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[Bug 1585210] [NEW] Unstable Wifi Intel 7265

To: kernel-packages@xxxxxxxxxxxxxxxxxxx
From: Fernando Sclavo <fsclavo@xxxxxxxxx>
Date: Tue, 24 May 2016 13:36:14 -0000
Reply-to: Bug 1585210 <1585210@xxxxxxxxxxxxxxxxxx>
Sender: bounces@xxxxxxxxxxxxx
Public bug reported:

With some routers, my wifi connection drops and restarts with the
following error:

May 23 20:12:00 neftali kernel: [ 1262.463055] iwlwifi 0000:02:00.0: Queue 16 stuck for 10000 ms.
May 23 20:12:00 neftali kernel: [ 1262.463066] iwlwifi 0000:02:00.0: Current SW read_ptr 244 write_ptr 24
May 23 20:12:00 neftali kernel: [ 1262.463107] iwl data: 00000000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
May 23 20:12:00 neftali kernel: [ 1262.463131] iwlwifi 0000:02:00.0: FH TRBs(0) = 0x00000000
May 23 20:12:00 neftali kernel: [ 1262.463152] iwlwifi 0000:02:00.0: FH TRBs(1) = 0xc0110003
May 23 20:12:00 neftali kernel: [ 1262.463173] iwlwifi 0000:02:00.0: FH TRBs(2) = 0x00000000
May 23 20:12:00 neftali kernel: [ 1262.463193] iwlwifi 0000:02:00.0: FH TRBs(3) = 0x80300017
May 23 20:12:00 neftali kernel: [ 1262.463206] iwlwifi 0000:02:00.0: FH TRBs(4) = 0x00000000
May 23 20:12:00 neftali kernel: [ 1262.463231] iwlwifi 0000:02:00.0: FH TRBs(5) = 0x00000000
May 23 20:12:00 neftali kernel: [ 1262.463252] iwlwifi 0000:02:00.0: FH TRBs(6) = 0x00000000
May 23 20:12:00 neftali kernel: [ 1262.463273] iwlwifi 0000:02:00.0: FH TRBs(7) = 0x00709006
May 23 20:12:00 neftali kernel: [ 1262.463331] iwlwifi 0000:02:00.0: Q 0 is active and mapped to fifo 3 ra_tid 0x0000 [24,24]
May 23 20:12:00 neftali kernel: [ 1262.463394] iwlwifi 0000:02:00.0: Q 1 is active and mapped to fifo 2 ra_tid 0x0000 [0,0]
May 23 20:12:00 neftali kernel: [ 1262.463456] iwlwifi 0000:02:00.0: Q 2 is active and mapped to fifo 1 ra_tid 0x0000 [50,50]
May 23 20:12:00 neftali kernel: [ 1262.463518] iwlwifi 0000:02:00.0: Q 3 is active and mapped to fifo 0 ra_tid 0x0000 [0,0]
May 23 20:12:00 neftali kernel: [ 1262.463580] iwlwifi 0000:02:00.0: Q 4 is inactive and mapped to fifo 0 ra_tid 0x0000 [0,0]
May 23 20:12:00 neftali kernel: [ 1262.463642] iwlwifi 0000:02:00.0: Q 5 is inactive and mapped to fifo 0 ra_tid 0x0000 [0,0]
May 23 20:12:00 neftali kernel: [ 1262.463705] iwlwifi 0000:02:00.0: Q 6 is inactive and mapped to fifo 0 ra_tid 0x0000 [0,0]
May 23 20:12:00 neftali kernel: [ 1262.463767] iwlwifi 0000:02:00.0: Q 7 is inactive and mapped to fifo 0 ra_tid 0x0000 [0,0]
May 23 20:12:00 neftali kernel: [ 1262.463829] iwlwifi 0000:02:00.0: Q 8 is active and mapped to fifo 3 ra_tid 0x0000 [0,0]
May 23 20:12:00 neftali kernel: [ 1262.463891] iwlwifi 0000:02:00.0: Q 9 is active and mapped to fifo 7 ra_tid 0x0000 [7,7]
May 23 20:12:00 neftali kernel: [ 1262.463974] iwlwifi 0000:02:00.0: Q 10 is inactive and mapped to fifo 0 ra_tid 0x0000 [0,0]
May 23 20:12:00 neftali kernel: [ 1262.464036] iwlwifi 0000:02:00.0: Q 11 is inactive and mapped to fifo 0 ra_tid 0x0000 [0,0]
May 23 20:12:00 neftali kernel: [ 1262.464098] iwlwifi 0000:02:00.0: Q 12 is inactive and mapped to fifo 0 ra_tid 0x0000 [0,0]
May 23 20:12:00 neftali kernel: [ 1262.464160] iwlwifi 0000:02:00.0: Q 13 is inactive and mapped to fifo 0 ra_tid 0x0000 [0,0]
May 23 20:12:00 neftali kernel: [ 1262.464222] iwlwifi 0000:02:00.0: Q 14 is inactive and mapped to fifo 0 ra_tid 0x0000 [0,0]
May 23 20:12:00 neftali kernel: [ 1262.464284] iwlwifi 0000:02:00.0: Q 15 is active and mapped to fifo 5 ra_tid 0x0000 [0,0]
May 23 20:12:00 neftali kernel: [ 1262.464346] iwlwifi 0000:02:00.0: Q 16 is active and mapped to fifo 1 ra_tid 0x000f [244,24]
May 23 20:12:00 neftali kernel: [ 1262.464408] iwlwifi 0000:02:00.0: Q 17 is inactive and mapped to fifo 0 ra_tid 0x0000 [0,0]
May 23 20:12:00 neftali kernel: [ 1262.464470] iwlwifi 0000:02:00.0: Q 18 is inactive and mapped to fifo 0 ra_tid 0x0000 [0,0]
May 23 20:12:00 neftali kernel: [ 1262.464532] iwlwifi 0000:02:00.0: Q 19 is inactive and mapped to fifo 0 ra_tid 0x0000 [0,0]
May 23 20:12:00 neftali kernel: [ 1262.464594] iwlwifi 0000:02:00.0: Q 20 is inactive and mapped to fifo 0 ra_tid 0x0000 [0,0]
May 23 20:12:00 neftali kernel: [ 1262.464656] iwlwifi 0000:02:00.0: Q 21 is inactive and mapped to fifo 0 ra_tid 0xfff0 [0,0]
May 23 20:12:00 neftali kernel: [ 1262.464718] iwlwifi 0000:02:00.0: Q 22 is inactive and mapped to fifo 0 ra_tid 0x0000 [0,0]
May 23 20:12:00 neftali kernel: [ 1262.464780] iwlwifi 0000:02:00.0: Q 23 is inactive and mapped to fifo 0 ra_tid 0x0000 [0,0]
May 23 20:12:00 neftali kernel: [ 1262.464838] iwlwifi 0000:02:00.0: Q 24 is inactive and mapped to fifo 0 ra_tid 0x0000 [0,0]
May 23 20:12:00 neftali kernel: [ 1262.464900] iwlwifi 0000:02:00.0: Q 25 is inactive and mapped to fifo 0 ra_tid 0x0000 [0,0]
May 23 20:12:00 neftali kernel: [ 1262.464962] iwlwifi 0000:02:00.0: Q 26 is inactive and mapped to fifo 0 ra_tid 0x0000 [0,0]
May 23 20:12:00 neftali kernel: [ 1262.465045] iwlwifi 0000:02:00.0: Q 27 is inactive and mapped to fifo 0 ra_tid 0x0000 [0,0]
May 23 20:12:00 neftali kernel: [ 1262.465103] iwlwifi 0000:02:00.0: Q 28 is inactive and mapped to fifo 0 ra_tid 0x0000 [0,0]
May 23 20:12:00 neftali kernel: [ 1262.465161] iwlwifi 0000:02:00.0: Q 29 is inactive and mapped to fifo 0 ra_tid 0x0000 [0,0]
May 23 20:12:00 neftali kernel: [ 1262.465219] iwlwifi 0000:02:00.0: Q 30 is inactive and mapped to fifo 0 ra_tid 0x0000 [0,0]
May 23 20:12:00 neftali kernel: [ 1262.465298] iwlwifi 0000:02:00.0: Microcode SW error detected.  Restarting 0x2000000.
May 23 20:12:00 neftali kernel: [ 1262.465301] iwlwifi 0000:02:00.0: CSR values:
May 23 20:12:00 neftali kernel: [ 1262.465303] iwlwifi 0000:02:00.0: (2nd byte of CSR_INT_COALESCING is CSR_INT_PERIODIC_REG)
May 23 20:12:00 neftali kernel: [ 1262.465313] iwlwifi 0000:02:00.0:        CSR_HW_IF_CONFIG_REG: 0X00489200
May 23 20:12:00 neftali kernel: [ 1262.465330] iwlwifi 0000:02:00.0:          CSR_INT_COALESCING: 0X00000040
May 23 20:12:00 neftali kernel: [ 1262.465347] iwlwifi 0000:02:00.0:                     CSR_INT: 0X00000000
May 23 20:12:00 neftali kernel: [ 1262.465362] iwlwifi 0000:02:00.0:                CSR_INT_MASK: 0X00000000
May 23 20:12:00 neftali kernel: [ 1262.465374] iwlwifi 0000:02:00.0:           CSR_FH_INT_STATUS: 0X00000000
May 23 20:12:00 neftali kernel: [ 1262.465385] iwlwifi 0000:02:00.0:                 CSR_GPIO_IN: 0X00000000
May 23 20:12:00 neftali kernel: [ 1262.465397] iwlwifi 0000:02:00.0:                   CSR_RESET: 0X00000000
May 23 20:12:00 neftali kernel: [ 1262.465409] iwlwifi 0000:02:00.0:                CSR_GP_CNTRL: 0X080403c5
May 23 20:12:00 neftali kernel: [ 1262.465421] iwlwifi 0000:02:00.0:                  CSR_HW_REV: 0X00000210
May 23 20:12:00 neftali kernel: [ 1262.465433] iwlwifi 0000:02:00.0:              CSR_EEPROM_REG: 0Xd55555d5
May 23 20:12:00 neftali kernel: [ 1262.465445] iwlwifi 0000:02:00.0:               CSR_EEPROM_GP: 0X00000000
May 23 20:12:00 neftali kernel: [ 1262.465462] iwlwifi 0000:02:00.0:              CSR_OTP_GP_REG: 0Xd55555d5
May 23 20:12:00 neftali kernel: [ 1262.465477] iwlwifi 0000:02:00.0:                 CSR_GIO_REG: 0X001f0042
May 23 20:12:00 neftali kernel: [ 1262.465489] iwlwifi 0000:02:00.0:            CSR_GP_UCODE_REG: 0X00000000
May 23 20:12:00 neftali kernel: [ 1262.465500] iwlwifi 0000:02:00.0:           CSR_GP_DRIVER_REG: 0X00000000
May 23 20:12:00 neftali kernel: [ 1262.465512] iwlwifi 0000:02:00.0:           CSR_UCODE_DRV_GP1: 0X00000000
May 23 20:12:00 neftali kernel: [ 1262.465524] iwlwifi 0000:02:00.0:           CSR_UCODE_DRV_GP2: 0X00000000
May 23 20:12:00 neftali kernel: [ 1262.465535] iwlwifi 0000:02:00.0:                 CSR_LED_REG: 0X00000060
May 23 20:12:00 neftali kernel: [ 1262.465547] iwlwifi 0000:02:00.0:        CSR_DRAM_INT_TBL_REG: 0X8840600b
May 23 20:12:00 neftali kernel: [ 1262.465559] iwlwifi 0000:02:00.0:        CSR_GIO_CHICKEN_BITS: 0X27800200
May 23 20:12:00 neftali kernel: [ 1262.465570] iwlwifi 0000:02:00.0:             CSR_ANA_PLL_CFG: 0Xd55555d5
May 23 20:12:00 neftali kernel: [ 1262.465582] iwlwifi 0000:02:00.0:      CSR_MONITOR_STATUS_REG: 0Xebb7ff57
May 23 20:12:00 neftali kernel: [ 1262.465594] iwlwifi 0000:02:00.0:           CSR_HW_REV_WA_REG: 0X0001001a
May 23 20:12:00 neftali kernel: [ 1262.465609] iwlwifi 0000:02:00.0:        CSR_DBG_HPET_MEM_REG: 0Xffff0010
May 23 20:12:00 neftali kernel: [ 1262.465611] iwlwifi 0000:02:00.0: FH register values:
May 23 20:12:00 neftali kernel: [ 1262.465633] iwlwifi 0000:02:00.0:         FH_RSCSR_CHNL0_STTS_WPTR_REG: 0X40a4f300
May 23 20:12:00 neftali kernel: [ 1262.465645] iwlwifi 0000:02:00.0:        FH_RSCSR_CHNL0_RBDCB_BASE_REG: 0X040a4f20
May 23 20:12:00 neftali kernel: [ 1262.465657] iwlwifi 0000:02:00.0:                  FH_RSCSR_CHNL0_WPTR: 0X00000038
May 23 20:12:00 neftali kernel: [ 1262.465669] iwlwifi 0000:02:00.0:         FH_MEM_RCSR_CHNL0_CONFIG_REG: 0X00801114
May 23 20:12:00 neftali kernel: [ 1262.465681] iwlwifi 0000:02:00.0:          FH_MEM_RSSR_SHARED_CTRL_REG: 0X000000fc
May 23 20:12:00 neftali kernel: [ 1262.465692] iwlwifi 0000:02:00.0:            FH_MEM_RSSR_RX_STATUS_REG: 0X03030000
May 23 20:12:00 neftali kernel: [ 1262.465703] iwlwifi 0000:02:00.0:    FH_MEM_RSSR_RX_ENABLE_ERR_IRQ2DRV: 0X00000000
May 23 20:12:00 neftali kernel: [ 1262.465714] iwlwifi 0000:02:00.0:                FH_TSSR_TX_STATUS_REG: 0X07ff0001
May 23 20:12:00 neftali kernel: [ 1262.465725] iwlwifi 0000:02:00.0:                 FH_TSSR_TX_ERROR_REG: 0X00000000
May 23 20:12:00 neftali kernel: [ 1262.465830] iwlwifi 0000:02:00.0: Start IWL Error Log Dump:
May 23 20:12:00 neftali kernel: [ 1262.465831] iwlwifi 0000:02:00.0: Status: 0x00000000, count: 6
May 23 20:12:00 neftali kernel: [ 1262.465832] iwlwifi 0000:02:00.0: Loaded firmware version: 16.242414.0
May 23 20:12:00 neftali kernel: [ 1262.465834] iwlwifi 0000:02:00.0: 0x00000084 | NMI_INTERRUPT_UNKNOWN       
May 23 20:12:00 neftali kernel: [ 1262.465835] iwlwifi 0000:02:00.0: 0x008006F4 | uPc
May 23 20:12:00 neftali kernel: [ 1262.465836] iwlwifi 0000:02:00.0: 0x00000000 | branchlink1
May 23 20:12:00 neftali kernel: [ 1262.465837] iwlwifi 0000:02:00.0: 0x00042524 | branchlink2
May 23 20:12:00 neftali kernel: [ 1262.465837] iwlwifi 0000:02:00.0: 0x00042E68 | interruptlink1
May 23 20:12:00 neftali kernel: [ 1262.465838] iwlwifi 0000:02:00.0: 0x0004C852 | interruptlink2
May 23 20:12:00 neftali kernel: [ 1262.465839] iwlwifi 0000:02:00.0: 0x00000000 | data1
May 23 20:12:00 neftali kernel: [ 1262.465840] iwlwifi 0000:02:00.0: 0x00000080 | data2
May 23 20:12:00 neftali kernel: [ 1262.465841] iwlwifi 0000:02:00.0: 0x07030000 | data3
May 23 20:12:00 neftali kernel: [ 1262.465842] iwlwifi 0000:02:00.0: 0x114034F1 | beacon time
May 23 20:12:00 neftali kernel: [ 1262.465843] iwlwifi 0000:02:00.0: 0x05FC9AC7 | tsf low
May 23 20:12:00 neftali kernel: [ 1262.465844] iwlwifi 0000:02:00.0: 0x00000000 | tsf hi
May 23 20:12:00 neftali kernel: [ 1262.465845] iwlwifi 0000:02:00.0: 0x00000000 | time gp1
May 23 20:12:00 neftali kernel: [ 1262.465846] iwlwifi 0000:02:00.0: 0x14F1797D | time gp2
May 23 20:12:00 neftali kernel: [ 1262.465846] iwlwifi 0000:02:00.0: 0x00000000 | time gp3
May 23 20:12:00 neftali kernel: [ 1262.465847] iwlwifi 0000:02:00.0: 0x00000010 | uCode version major
May 23 20:12:00 neftali kernel: [ 1262.465848] iwlwifi 0000:02:00.0: 0x0003B2EE | uCode version minor
May 23 20:12:00 neftali kernel: [ 1262.465849] iwlwifi 0000:02:00.0: 0x00000210 | hw version
May 23 20:12:00 neftali kernel: [ 1262.465850] iwlwifi 0000:02:00.0: 0x00489200 | board version
May 23 20:12:00 neftali kernel: [ 1262.465851] iwlwifi 0000:02:00.0: 0x10F4001C | hcmd
May 23 20:12:00 neftali kernel: [ 1262.465852] iwlwifi 0000:02:00.0: 0x80022002 | isr0
May 23 20:12:00 neftali kernel: [ 1262.465853] iwlwifi 0000:02:00.0: 0x00800000 | isr1
May 23 20:12:00 neftali kernel: [ 1262.465854] iwlwifi 0000:02:00.0: 0x0000000A | isr2
May 23 20:12:00 neftali kernel: [ 1262.465854] iwlwifi 0000:02:00.0: 0x004028C5 | isr3
May 23 20:12:00 neftali kernel: [ 1262.465855] iwlwifi 0000:02:00.0: 0x00000000 | isr4
May 23 20:12:00 neftali kernel: [ 1262.465856] iwlwifi 0000:02:00.0: 0x00004110 | isr_pref
May 23 20:12:00 neftali kernel: [ 1262.465857] iwlwifi 0000:02:00.0: 0x00000000 | wait_event
May 23 20:12:00 neftali kernel: [ 1262.465858] iwlwifi 0000:02:00.0: 0x0000DAE8 | l2p_control
May 23 20:12:00 neftali kernel: [ 1262.465859] iwlwifi 0000:02:00.0: 0x00002020 | l2p_duration
May 23 20:12:00 neftali kernel: [ 1262.465860] iwlwifi 0000:02:00.0: 0x000001BF | l2p_mhvalid
May 23 20:12:00 neftali kernel: [ 1262.465861] iwlwifi 0000:02:00.0: 0x00000020 | l2p_addr_match
May 23 20:12:00 neftali kernel: [ 1262.465861] iwlwifi 0000:02:00.0: 0x00000005 | lmpm_pmg_sel
May 23 20:12:00 neftali kernel: [ 1262.465862] iwlwifi 0000:02:00.0: 0x17111915 | timestamp
May 23 20:12:00 neftali kernel: [ 1262.465863] iwlwifi 0000:02:00.0: 0x00343848 | flow_handler
May 23 20:12:00 neftali kernel: [ 1262.465866] ieee80211 phy0: Hardware restart was requested
May 23 20:12:00 neftali kernel: [ 1262.612457] iwlwifi 0000:02:00.0: L1 Enabled - LTR Enabled
May 23 20:12:00 neftali kernel: [ 1262.612867] iwlwifi 0000:02:00.0: L1 Enabled - LTR Enabled
May 23 20:12:00 neftali kernel: [ 1262.674083] iwlwifi 0000:02:00.0: L1 Enabled - LTR Enabled
May 23 20:12:00 neftali kernel: [ 1262.674531] iwlwifi 0000:02:00.0: L1 Enabled - LTR Enabled

Wifi card is:

02:00.0 Network controller: Intel Corporation Wireless 7265 (rev 59)
	Subsystem: Intel Corporation Dual Band Wireless-AC 7265
	Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx+
	Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
	Latency: 0, Cache Line Size: 64 bytes
	Interrupt: pin A routed to IRQ 52
	Region 0: Memory at f7000000 (64-bit, non-prefetchable) [size=8K]
	Capabilities: <access denied>
	Kernel driver in use: iwlwifi
	Kernel modules: iwlwifi

Please let me know if you need more information.

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: linux-image-4.4.0-22-generic 4.4.0-22.40
ProcVersionSignature: Ubuntu 4.4.0-22.40-generic 4.4.8
Uname: Linux 4.4.0-22-generic x86_64
ApportVersion: 2.20.1-0ubuntu2
Architecture: amd64
AudioDevicesInUse:
 USER        PID ACCESS COMMAND
 /dev/snd/pcmC1D0p:   fsclavo    2531 F...m pulseaudio
 /dev/snd/controlC1:  fsclavo    2531 F.... pulseaudio
 /dev/snd/controlC0:  fsclavo    2531 F.... pulseaudio
CurrentDesktop: Unity
Date: Tue May 24 10:31:07 2016
EcryptfsInUse: Yes
HibernationDevice: RESUME=UUID=610afe9e-69b0-474f-807e-9ab6fff3f5ce
InstallationDate: Installed on 2016-04-01 (52 days ago)
InstallationMedia: Ubuntu 15.10 "Wily Werewolf" - Release amd64 (20151021)
JournalErrors:
 Error: command ['journalctl', '-b', '--priority=warning', '--lines=1000'] failed with exit code 1: Hint: You are currently not seeing messages from other users and the system.
       Users in the 'systemd-journal' group can see all messages. Pass -q to
       turn off this notice.
 No journal files were opened due to insufficient permissions.
MachineType: Dell Inc. Latitude E7450
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.4.0-22-generic root=UUID=ab46b861-e6ad-46aa-824f-33e925cabf6c ro quiet splash vt.handoff=7
RelatedPackageVersions:
 linux-restricted-modules-4.4.0-22-generic N/A
 linux-backports-modules-4.4.0-22-generic  N/A
 linux-firmware                            1.157
SourcePackage: linux
UpgradeStatus: Upgraded to xenial on 2016-04-22 (31 days ago)
WifiSyslog:
 
dmi.bios.date: 03/29/2016
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A11
dmi.board.name: 06HN6G
dmi.board.vendor: Dell Inc.
dmi.board.version: A00
dmi.chassis.type: 9
dmi.chassis.vendor: Dell Inc.
dmi.modalias: dmi:bvnDellInc.:bvrA11:bd03/29/2016:svnDellInc.:pnLatitudeE7450:pvr:rvnDellInc.:rn06HN6G:rvrA00:cvnDellInc.:ct9:cvr:
dmi.product.name: Latitude E7450
dmi.sys.vendor: Dell Inc.

** Affects: linux (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug xenial

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https://bugs.launchpad.net/bugs/1585210

Title:
  Unstable Wifi Intel 7265

Status in linux package in Ubuntu:
  New

Bug description:
  With some routers, my wifi connection drops and restarts with the
  following error:

  May 23 20:12:00 neftali kernel: [ 1262.463055] iwlwifi 0000:02:00.0: Queue 16 stuck for 10000 ms.
  May 23 20:12:00 neftali kernel: [ 1262.463066] iwlwifi 0000:02:00.0: Current SW read_ptr 244 write_ptr 24
  May 23 20:12:00 neftali kernel: [ 1262.463107] iwl data: 00000000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
  May 23 20:12:00 neftali kernel: [ 1262.463131] iwlwifi 0000:02:00.0: FH TRBs(0) = 0x00000000
  May 23 20:12:00 neftali kernel: [ 1262.463152] iwlwifi 0000:02:00.0: FH TRBs(1) = 0xc0110003
  May 23 20:12:00 neftali kernel: [ 1262.463173] iwlwifi 0000:02:00.0: FH TRBs(2) = 0x00000000
  May 23 20:12:00 neftali kernel: [ 1262.463193] iwlwifi 0000:02:00.0: FH TRBs(3) = 0x80300017
  May 23 20:12:00 neftali kernel: [ 1262.463206] iwlwifi 0000:02:00.0: FH TRBs(4) = 0x00000000
  May 23 20:12:00 neftali kernel: [ 1262.463231] iwlwifi 0000:02:00.0: FH TRBs(5) = 0x00000000
  May 23 20:12:00 neftali kernel: [ 1262.463252] iwlwifi 0000:02:00.0: FH TRBs(6) = 0x00000000
  May 23 20:12:00 neftali kernel: [ 1262.463273] iwlwifi 0000:02:00.0: FH TRBs(7) = 0x00709006
  May 23 20:12:00 neftali kernel: [ 1262.463331] iwlwifi 0000:02:00.0: Q 0 is active and mapped to fifo 3 ra_tid 0x0000 [24,24]
  May 23 20:12:00 neftali kernel: [ 1262.463394] iwlwifi 0000:02:00.0: Q 1 is active and mapped to fifo 2 ra_tid 0x0000 [0,0]
  May 23 20:12:00 neftali kernel: [ 1262.463456] iwlwifi 0000:02:00.0: Q 2 is active and mapped to fifo 1 ra_tid 0x0000 [50,50]
  May 23 20:12:00 neftali kernel: [ 1262.463518] iwlwifi 0000:02:00.0: Q 3 is active and mapped to fifo 0 ra_tid 0x0000 [0,0]
  May 23 20:12:00 neftali kernel: [ 1262.463580] iwlwifi 0000:02:00.0: Q 4 is inactive and mapped to fifo 0 ra_tid 0x0000 [0,0]
  May 23 20:12:00 neftali kernel: [ 1262.463642] iwlwifi 0000:02:00.0: Q 5 is inactive and mapped to fifo 0 ra_tid 0x0000 [0,0]
  May 23 20:12:00 neftali kernel: [ 1262.463705] iwlwifi 0000:02:00.0: Q 6 is inactive and mapped to fifo 0 ra_tid 0x0000 [0,0]
  May 23 20:12:00 neftali kernel: [ 1262.463767] iwlwifi 0000:02:00.0: Q 7 is inactive and mapped to fifo 0 ra_tid 0x0000 [0,0]
  May 23 20:12:00 neftali kernel: [ 1262.463829] iwlwifi 0000:02:00.0: Q 8 is active and mapped to fifo 3 ra_tid 0x0000 [0,0]
  May 23 20:12:00 neftali kernel: [ 1262.463891] iwlwifi 0000:02:00.0: Q 9 is active and mapped to fifo 7 ra_tid 0x0000 [7,7]
  May 23 20:12:00 neftali kernel: [ 1262.463974] iwlwifi 0000:02:00.0: Q 10 is inactive and mapped to fifo 0 ra_tid 0x0000 [0,0]
  May 23 20:12:00 neftali kernel: [ 1262.464036] iwlwifi 0000:02:00.0: Q 11 is inactive and mapped to fifo 0 ra_tid 0x0000 [0,0]
  May 23 20:12:00 neftali kernel: [ 1262.464098] iwlwifi 0000:02:00.0: Q 12 is inactive and mapped to fifo 0 ra_tid 0x0000 [0,0]
  May 23 20:12:00 neftali kernel: [ 1262.464160] iwlwifi 0000:02:00.0: Q 13 is inactive and mapped to fifo 0 ra_tid 0x0000 [0,0]
  May 23 20:12:00 neftali kernel: [ 1262.464222] iwlwifi 0000:02:00.0: Q 14 is inactive and mapped to fifo 0 ra_tid 0x0000 [0,0]
  May 23 20:12:00 neftali kernel: [ 1262.464284] iwlwifi 0000:02:00.0: Q 15 is active and mapped to fifo 5 ra_tid 0x0000 [0,0]
  May 23 20:12:00 neftali kernel: [ 1262.464346] iwlwifi 0000:02:00.0: Q 16 is active and mapped to fifo 1 ra_tid 0x000f [244,24]
  May 23 20:12:00 neftali kernel: [ 1262.464408] iwlwifi 0000:02:00.0: Q 17 is inactive and mapped to fifo 0 ra_tid 0x0000 [0,0]
  May 23 20:12:00 neftali kernel: [ 1262.464470] iwlwifi 0000:02:00.0: Q 18 is inactive and mapped to fifo 0 ra_tid 0x0000 [0,0]
  May 23 20:12:00 neftali kernel: [ 1262.464532] iwlwifi 0000:02:00.0: Q 19 is inactive and mapped to fifo 0 ra_tid 0x0000 [0,0]
  May 23 20:12:00 neftali kernel: [ 1262.464594] iwlwifi 0000:02:00.0: Q 20 is inactive and mapped to fifo 0 ra_tid 0x0000 [0,0]
  May 23 20:12:00 neftali kernel: [ 1262.464656] iwlwifi 0000:02:00.0: Q 21 is inactive and mapped to fifo 0 ra_tid 0xfff0 [0,0]
  May 23 20:12:00 neftali kernel: [ 1262.464718] iwlwifi 0000:02:00.0: Q 22 is inactive and mapped to fifo 0 ra_tid 0x0000 [0,0]
  May 23 20:12:00 neftali kernel: [ 1262.464780] iwlwifi 0000:02:00.0: Q 23 is inactive and mapped to fifo 0 ra_tid 0x0000 [0,0]
  May 23 20:12:00 neftali kernel: [ 1262.464838] iwlwifi 0000:02:00.0: Q 24 is inactive and mapped to fifo 0 ra_tid 0x0000 [0,0]
  May 23 20:12:00 neftali kernel: [ 1262.464900] iwlwifi 0000:02:00.0: Q 25 is inactive and mapped to fifo 0 ra_tid 0x0000 [0,0]
  May 23 20:12:00 neftali kernel: [ 1262.464962] iwlwifi 0000:02:00.0: Q 26 is inactive and mapped to fifo 0 ra_tid 0x0000 [0,0]
  May 23 20:12:00 neftali kernel: [ 1262.465045] iwlwifi 0000:02:00.0: Q 27 is inactive and mapped to fifo 0 ra_tid 0x0000 [0,0]
  May 23 20:12:00 neftali kernel: [ 1262.465103] iwlwifi 0000:02:00.0: Q 28 is inactive and mapped to fifo 0 ra_tid 0x0000 [0,0]
  May 23 20:12:00 neftali kernel: [ 1262.465161] iwlwifi 0000:02:00.0: Q 29 is inactive and mapped to fifo 0 ra_tid 0x0000 [0,0]
  May 23 20:12:00 neftali kernel: [ 1262.465219] iwlwifi 0000:02:00.0: Q 30 is inactive and mapped to fifo 0 ra_tid 0x0000 [0,0]
  May 23 20:12:00 neftali kernel: [ 1262.465298] iwlwifi 0000:02:00.0: Microcode SW error detected.  Restarting 0x2000000.
  May 23 20:12:00 neftali kernel: [ 1262.465301] iwlwifi 0000:02:00.0: CSR values:
  May 23 20:12:00 neftali kernel: [ 1262.465303] iwlwifi 0000:02:00.0: (2nd byte of CSR_INT_COALESCING is CSR_INT_PERIODIC_REG)
  May 23 20:12:00 neftali kernel: [ 1262.465313] iwlwifi 0000:02:00.0:        CSR_HW_IF_CONFIG_REG: 0X00489200
  May 23 20:12:00 neftali kernel: [ 1262.465330] iwlwifi 0000:02:00.0:          CSR_INT_COALESCING: 0X00000040
  May 23 20:12:00 neftali kernel: [ 1262.465347] iwlwifi 0000:02:00.0:                     CSR_INT: 0X00000000
  May 23 20:12:00 neftali kernel: [ 1262.465362] iwlwifi 0000:02:00.0:                CSR_INT_MASK: 0X00000000
  May 23 20:12:00 neftali kernel: [ 1262.465374] iwlwifi 0000:02:00.0:           CSR_FH_INT_STATUS: 0X00000000
  May 23 20:12:00 neftali kernel: [ 1262.465385] iwlwifi 0000:02:00.0:                 CSR_GPIO_IN: 0X00000000
  May 23 20:12:00 neftali kernel: [ 1262.465397] iwlwifi 0000:02:00.0:                   CSR_RESET: 0X00000000
  May 23 20:12:00 neftali kernel: [ 1262.465409] iwlwifi 0000:02:00.0:                CSR_GP_CNTRL: 0X080403c5
  May 23 20:12:00 neftali kernel: [ 1262.465421] iwlwifi 0000:02:00.0:                  CSR_HW_REV: 0X00000210
  May 23 20:12:00 neftali kernel: [ 1262.465433] iwlwifi 0000:02:00.0:              CSR_EEPROM_REG: 0Xd55555d5
  May 23 20:12:00 neftali kernel: [ 1262.465445] iwlwifi 0000:02:00.0:               CSR_EEPROM_GP: 0X00000000
  May 23 20:12:00 neftali kernel: [ 1262.465462] iwlwifi 0000:02:00.0:              CSR_OTP_GP_REG: 0Xd55555d5
  May 23 20:12:00 neftali kernel: [ 1262.465477] iwlwifi 0000:02:00.0:                 CSR_GIO_REG: 0X001f0042
  May 23 20:12:00 neftali kernel: [ 1262.465489] iwlwifi 0000:02:00.0:            CSR_GP_UCODE_REG: 0X00000000
  May 23 20:12:00 neftali kernel: [ 1262.465500] iwlwifi 0000:02:00.0:           CSR_GP_DRIVER_REG: 0X00000000
  May 23 20:12:00 neftali kernel: [ 1262.465512] iwlwifi 0000:02:00.0:           CSR_UCODE_DRV_GP1: 0X00000000
  May 23 20:12:00 neftali kernel: [ 1262.465524] iwlwifi 0000:02:00.0:           CSR_UCODE_DRV_GP2: 0X00000000
  May 23 20:12:00 neftali kernel: [ 1262.465535] iwlwifi 0000:02:00.0:                 CSR_LED_REG: 0X00000060
  May 23 20:12:00 neftali kernel: [ 1262.465547] iwlwifi 0000:02:00.0:        CSR_DRAM_INT_TBL_REG: 0X8840600b
  May 23 20:12:00 neftali kernel: [ 1262.465559] iwlwifi 0000:02:00.0:        CSR_GIO_CHICKEN_BITS: 0X27800200
  May 23 20:12:00 neftali kernel: [ 1262.465570] iwlwifi 0000:02:00.0:             CSR_ANA_PLL_CFG: 0Xd55555d5
  May 23 20:12:00 neftali kernel: [ 1262.465582] iwlwifi 0000:02:00.0:      CSR_MONITOR_STATUS_REG: 0Xebb7ff57
  May 23 20:12:00 neftali kernel: [ 1262.465594] iwlwifi 0000:02:00.0:           CSR_HW_REV_WA_REG: 0X0001001a
  May 23 20:12:00 neftali kernel: [ 1262.465609] iwlwifi 0000:02:00.0:        CSR_DBG_HPET_MEM_REG: 0Xffff0010
  May 23 20:12:00 neftali kernel: [ 1262.465611] iwlwifi 0000:02:00.0: FH register values:
  May 23 20:12:00 neftali kernel: [ 1262.465633] iwlwifi 0000:02:00.0:         FH_RSCSR_CHNL0_STTS_WPTR_REG: 0X40a4f300
  May 23 20:12:00 neftali kernel: [ 1262.465645] iwlwifi 0000:02:00.0:        FH_RSCSR_CHNL0_RBDCB_BASE_REG: 0X040a4f20
  May 23 20:12:00 neftali kernel: [ 1262.465657] iwlwifi 0000:02:00.0:                  FH_RSCSR_CHNL0_WPTR: 0X00000038
  May 23 20:12:00 neftali kernel: [ 1262.465669] iwlwifi 0000:02:00.0:         FH_MEM_RCSR_CHNL0_CONFIG_REG: 0X00801114
  May 23 20:12:00 neftali kernel: [ 1262.465681] iwlwifi 0000:02:00.0:          FH_MEM_RSSR_SHARED_CTRL_REG: 0X000000fc
  May 23 20:12:00 neftali kernel: [ 1262.465692] iwlwifi 0000:02:00.0:            FH_MEM_RSSR_RX_STATUS_REG: 0X03030000
  May 23 20:12:00 neftali kernel: [ 1262.465703] iwlwifi 0000:02:00.0:    FH_MEM_RSSR_RX_ENABLE_ERR_IRQ2DRV: 0X00000000
  May 23 20:12:00 neftali kernel: [ 1262.465714] iwlwifi 0000:02:00.0:                FH_TSSR_TX_STATUS_REG: 0X07ff0001
  May 23 20:12:00 neftali kernel: [ 1262.465725] iwlwifi 0000:02:00.0:                 FH_TSSR_TX_ERROR_REG: 0X00000000
  May 23 20:12:00 neftali kernel: [ 1262.465830] iwlwifi 0000:02:00.0: Start IWL Error Log Dump:
  May 23 20:12:00 neftali kernel: [ 1262.465831] iwlwifi 0000:02:00.0: Status: 0x00000000, count: 6
  May 23 20:12:00 neftali kernel: [ 1262.465832] iwlwifi 0000:02:00.0: Loaded firmware version: 16.242414.0
  May 23 20:12:00 neftali kernel: [ 1262.465834] iwlwifi 0000:02:00.0: 0x00000084 | NMI_INTERRUPT_UNKNOWN       
  May 23 20:12:00 neftali kernel: [ 1262.465835] iwlwifi 0000:02:00.0: 0x008006F4 | uPc
  May 23 20:12:00 neftali kernel: [ 1262.465836] iwlwifi 0000:02:00.0: 0x00000000 | branchlink1
  May 23 20:12:00 neftali kernel: [ 1262.465837] iwlwifi 0000:02:00.0: 0x00042524 | branchlink2
  May 23 20:12:00 neftali kernel: [ 1262.465837] iwlwifi 0000:02:00.0: 0x00042E68 | interruptlink1
  May 23 20:12:00 neftali kernel: [ 1262.465838] iwlwifi 0000:02:00.0: 0x0004C852 | interruptlink2
  May 23 20:12:00 neftali kernel: [ 1262.465839] iwlwifi 0000:02:00.0: 0x00000000 | data1
  May 23 20:12:00 neftali kernel: [ 1262.465840] iwlwifi 0000:02:00.0: 0x00000080 | data2
  May 23 20:12:00 neftali kernel: [ 1262.465841] iwlwifi 0000:02:00.0: 0x07030000 | data3
  May 23 20:12:00 neftali kernel: [ 1262.465842] iwlwifi 0000:02:00.0: 0x114034F1 | beacon time
  May 23 20:12:00 neftali kernel: [ 1262.465843] iwlwifi 0000:02:00.0: 0x05FC9AC7 | tsf low
  May 23 20:12:00 neftali kernel: [ 1262.465844] iwlwifi 0000:02:00.0: 0x00000000 | tsf hi
  May 23 20:12:00 neftali kernel: [ 1262.465845] iwlwifi 0000:02:00.0: 0x00000000 | time gp1
  May 23 20:12:00 neftali kernel: [ 1262.465846] iwlwifi 0000:02:00.0: 0x14F1797D | time gp2
  May 23 20:12:00 neftali kernel: [ 1262.465846] iwlwifi 0000:02:00.0: 0x00000000 | time gp3
  May 23 20:12:00 neftali kernel: [ 1262.465847] iwlwifi 0000:02:00.0: 0x00000010 | uCode version major
  May 23 20:12:00 neftali kernel: [ 1262.465848] iwlwifi 0000:02:00.0: 0x0003B2EE | uCode version minor
  May 23 20:12:00 neftali kernel: [ 1262.465849] iwlwifi 0000:02:00.0: 0x00000210 | hw version
  May 23 20:12:00 neftali kernel: [ 1262.465850] iwlwifi 0000:02:00.0: 0x00489200 | board version
  May 23 20:12:00 neftali kernel: [ 1262.465851] iwlwifi 0000:02:00.0: 0x10F4001C | hcmd
  May 23 20:12:00 neftali kernel: [ 1262.465852] iwlwifi 0000:02:00.0: 0x80022002 | isr0
  May 23 20:12:00 neftali kernel: [ 1262.465853] iwlwifi 0000:02:00.0: 0x00800000 | isr1
  May 23 20:12:00 neftali kernel: [ 1262.465854] iwlwifi 0000:02:00.0: 0x0000000A | isr2
  May 23 20:12:00 neftali kernel: [ 1262.465854] iwlwifi 0000:02:00.0: 0x004028C5 | isr3
  May 23 20:12:00 neftali kernel: [ 1262.465855] iwlwifi 0000:02:00.0: 0x00000000 | isr4
  May 23 20:12:00 neftali kernel: [ 1262.465856] iwlwifi 0000:02:00.0: 0x00004110 | isr_pref
  May 23 20:12:00 neftali kernel: [ 1262.465857] iwlwifi 0000:02:00.0: 0x00000000 | wait_event
  May 23 20:12:00 neftali kernel: [ 1262.465858] iwlwifi 0000:02:00.0: 0x0000DAE8 | l2p_control
  May 23 20:12:00 neftali kernel: [ 1262.465859] iwlwifi 0000:02:00.0: 0x00002020 | l2p_duration
  May 23 20:12:00 neftali kernel: [ 1262.465860] iwlwifi 0000:02:00.0: 0x000001BF | l2p_mhvalid
  May 23 20:12:00 neftali kernel: [ 1262.465861] iwlwifi 0000:02:00.0: 0x00000020 | l2p_addr_match
  May 23 20:12:00 neftali kernel: [ 1262.465861] iwlwifi 0000:02:00.0: 0x00000005 | lmpm_pmg_sel
  May 23 20:12:00 neftali kernel: [ 1262.465862] iwlwifi 0000:02:00.0: 0x17111915 | timestamp
  May 23 20:12:00 neftali kernel: [ 1262.465863] iwlwifi 0000:02:00.0: 0x00343848 | flow_handler
  May 23 20:12:00 neftali kernel: [ 1262.465866] ieee80211 phy0: Hardware restart was requested
  May 23 20:12:00 neftali kernel: [ 1262.612457] iwlwifi 0000:02:00.0: L1 Enabled - LTR Enabled
  May 23 20:12:00 neftali kernel: [ 1262.612867] iwlwifi 0000:02:00.0: L1 Enabled - LTR Enabled
  May 23 20:12:00 neftali kernel: [ 1262.674083] iwlwifi 0000:02:00.0: L1 Enabled - LTR Enabled
  May 23 20:12:00 neftali kernel: [ 1262.674531] iwlwifi 0000:02:00.0: L1 Enabled - LTR Enabled

  Wifi card is:

  02:00.0 Network controller: Intel Corporation Wireless 7265 (rev 59)
  	Subsystem: Intel Corporation Dual Band Wireless-AC 7265
  	Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx+
  	Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
  	Latency: 0, Cache Line Size: 64 bytes
  	Interrupt: pin A routed to IRQ 52
  	Region 0: Memory at f7000000 (64-bit, non-prefetchable) [size=8K]
  	Capabilities: <access denied>
  	Kernel driver in use: iwlwifi
  	Kernel modules: iwlwifi

  Please let me know if you need more information.

  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: linux-image-4.4.0-22-generic 4.4.0-22.40
  ProcVersionSignature: Ubuntu 4.4.0-22.40-generic 4.4.8
  Uname: Linux 4.4.0-22-generic x86_64
  ApportVersion: 2.20.1-0ubuntu2
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/pcmC1D0p:   fsclavo    2531 F...m pulseaudio
   /dev/snd/controlC1:  fsclavo    2531 F.... pulseaudio
   /dev/snd/controlC0:  fsclavo    2531 F.... pulseaudio
  CurrentDesktop: Unity
  Date: Tue May 24 10:31:07 2016
  EcryptfsInUse: Yes
  HibernationDevice: RESUME=UUID=610afe9e-69b0-474f-807e-9ab6fff3f5ce
  InstallationDate: Installed on 2016-04-01 (52 days ago)
  InstallationMedia: Ubuntu 15.10 "Wily Werewolf" - Release amd64 (20151021)
  JournalErrors:
   Error: command ['journalctl', '-b', '--priority=warning', '--lines=1000'] failed with exit code 1: Hint: You are currently not seeing messages from other users and the system.
         Users in the 'systemd-journal' group can see all messages. Pass -q to
         turn off this notice.
   No journal files were opened due to insufficient permissions.
  MachineType: Dell Inc. Latitude E7450
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.4.0-22-generic root=UUID=ab46b861-e6ad-46aa-824f-33e925cabf6c ro quiet splash vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-4.4.0-22-generic N/A
   linux-backports-modules-4.4.0-22-generic  N/A
   linux-firmware                            1.157
  SourcePackage: linux
  UpgradeStatus: Upgraded to xenial on 2016-04-22 (31 days ago)
  WifiSyslog:
   
  dmi.bios.date: 03/29/2016
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: A11
  dmi.board.name: 06HN6G
  dmi.board.vendor: Dell Inc.
  dmi.board.version: A00
  dmi.chassis.type: 9
  dmi.chassis.vendor: Dell Inc.
  dmi.modalias: dmi:bvnDellInc.:bvrA11:bd03/29/2016:svnDellInc.:pnLatitudeE7450:pvr:rvnDellInc.:rn06HN6G:rvrA00:cvnDellInc.:ct9:cvr:
  dmi.product.name: Latitude E7450
  dmi.sys.vendor: Dell Inc.

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Follow ups

[Bug 1585210] Re: Unstable Wifi Intel 7265
From: Christopher M. Penalver, 2016-06-07
[Bug 1585210] Re: Unstable Wifi Intel 7265
From: Fernando Sclavo, 2016-06-07
[Bug 1585210] Re: Unstable Wifi Intel 7265
From: Christopher M. Penalver, 2016-06-06
[Bug 1585210] Re: Unstable Wifi Intel 7265
From: Joseph Salisbury, 2016-05-24
[Bug 1585210] Status changed to Confirmed
From: Brad Figg, 2016-05-24