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[Bug 1527444] Re: Intel 7260 Wifi not working on Ubuntu 15.10

To: kernel-packages@xxxxxxxxxxxxxxxxxxx
From: "Christopher M. Penalver" <christopher.m.penalver@xxxxxxxxx>
Date: Tue, 22 Dec 2015 00:53:36 -0000
Reply-to: Bug 1527444 <1527444@xxxxxxxxxxxxxxxxxx>
Sender: bounces@xxxxxxxxxxxxx
Rodrigo Primo, as per http://www.dell.com/support/home/us/en/19/product-
support/product/vostro-5470/drivers/advanced an update to your
computer's buggy and outdated BIOS is available (A12). If you update to
this following https://help.ubuntu.com/community/BIOSUpdate does it
change anything?

For more on BIOS updates and linux, please see
https://help.ubuntu.com/community/ReportingBugs#Bug_reporting_etiquette
.

Please note your current BIOS is already in the Bug Description, so
posting this on the old BIOS would not be helpful. As well, you don't
have to create a new bug report.

Once the BIOS is updated, if the problem is still reproducible:
1) Please provide the output of the following terminal command (not perform an apport-collect):
sudo dmidecode -s bios-version && sudo dmidecode -s bios-release-date
2) Please make a comment specifically advising on if there was an improvement or not.
3) Please mark this report Status Confirmed. If it's not reproducible, please mark this as Invalid.

Thank you for your understanding.

** Tags added: bios-outdated-a12

-- 
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https://bugs.launchpad.net/bugs/1527444

Title:
  Intel 7260 Wifi not working on Ubuntu 15.10

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  I'm unable to use my Intel 7260 Wifi card on a clean Ubuntu 15.10
  install. It is able to connect to my wifi network but after a few
  seconds the connection stop working. The same card on the same
  notebook used to work without problems on Ubuntu 15.04. I'm sending
  below the output of lspci and dmesg.

  # lspci | grep Wireless
  08:00.0 Network controller: Intel Corporation Wireless 7260 (rev 93)

  # dmesg | grep iwl
  [   10.383735] iwlwifi 0000:08:00.0: Direct firmware load for iwlwifi-7260-15.ucode failed with error -2
  [   10.385170] iwlwifi 0000:08:00.0: Direct firmware load for iwlwifi-7260-14.ucode failed with error -2
  [   10.390440] iwlwifi 0000:08:00.0: loaded firmware version 25.30.13.0 op_mode iwlmvm
  [   10.418883] iwlwifi 0000:08:00.0: Detected Intel(R) Wireless N 7260, REV=0x144
  [   10.418958] iwlwifi 0000:08:00.0: L1 Enabled - LTR Enabled
  [   10.419195] iwlwifi 0000:08:00.0: L1 Enabled - LTR Enabled
  [   10.651196] ieee80211 phy0: Selected rate control algorithm 'iwl-mvm-rs'
  [   10.653379] iwlwifi 0000:08:00.0 wlp8s0: renamed from wlan0
  [   11.247868] iwlwifi 0000:08:00.0: L1 Enabled - LTR Enabled
  [   11.248149] iwlwifi 0000:08:00.0: L1 Enabled - LTR Enabled
  [   11.469207] iwlwifi 0000:08:00.0: L1 Enabled - LTR Enabled
  [   11.469447] iwlwifi 0000:08:00.0: L1 Enabled - LTR Enabled
  [   11.913946] Modules linked in: bnep arc4 drbg ansi_cprng nls_iso8859_1 dm_crypt dell_wmi sparse_keymap intel_rapl iosf_mbi x86_pkg_temp_thermal intel_powerclamp dell_laptop coretemp kvm_intel dcdbas dell_smm_hwmon kvm crct10dif_pclmul crc32_pclmul aesni_intel aes_x86_64 lrw gf128mul iwlmvm glue_helper ablk_helper cryptd mac80211 serio_raw snd_hda_codec_hdmi iwlwifi cfg80211 snd_hda_codec_realtek snd_hda_codec_generic lpc_ich rtsx_pci_ms snd_usb_audio memstick snd_seq_midi snd_usbmidi_lib snd_hda_intel snd_seq_midi_event snd_hda_codec shpchp mei_me snd_hda_core snd_hwdep mei snd_rawmidi btusb btrtl btbcm btintel snd_seq snd_pcm bluetooth uvcvideo videobuf2_vmalloc videobuf2_memops hid_multitouch videobuf2_core joydev v4l2_common videodev input_leds media snd_seq_device snd_timer snd soundcore intel_smartconnect
  [   13.284231] Modules linked in: rfcomm ctr ccm bnep arc4 drbg ansi_cprng nls_iso8859_1 dm_crypt dell_wmi sparse_keymap intel_rapl iosf_mbi x86_pkg_temp_thermal intel_powerclamp dell_laptop coretemp kvm_intel dcdbas dell_smm_hwmon kvm crct10dif_pclmul crc32_pclmul aesni_intel aes_x86_64 lrw gf128mul iwlmvm glue_helper ablk_helper cryptd mac80211 serio_raw snd_hda_codec_hdmi iwlwifi cfg80211 snd_hda_codec_realtek snd_hda_codec_generic lpc_ich rtsx_pci_ms snd_usb_audio memstick snd_seq_midi snd_usbmidi_lib snd_hda_intel snd_seq_midi_event snd_hda_codec shpchp mei_me snd_hda_core snd_hwdep mei snd_rawmidi btusb btrtl btbcm btintel snd_seq snd_pcm bluetooth uvcvideo videobuf2_vmalloc videobuf2_memops hid_multitouch videobuf2_core joydev v4l2_common videodev input_leds media snd_seq_device snd_timer snd
  [   13.312469] Modules linked in: rfcomm ctr ccm bnep arc4 drbg ansi_cprng nls_iso8859_1 dm_crypt dell_wmi sparse_keymap intel_rapl iosf_mbi x86_pkg_temp_thermal intel_powerclamp dell_laptop coretemp kvm_intel dcdbas dell_smm_hwmon kvm crct10dif_pclmul crc32_pclmul aesni_intel aes_x86_64 lrw gf128mul iwlmvm glue_helper ablk_helper cryptd mac80211 serio_raw snd_hda_codec_hdmi iwlwifi cfg80211 snd_hda_codec_realtek snd_hda_codec_generic lpc_ich rtsx_pci_ms snd_usb_audio memstick snd_seq_midi snd_usbmidi_lib snd_hda_intel snd_seq_midi_event snd_hda_codec shpchp mei_me snd_hda_core snd_hwdep mei snd_rawmidi btusb btrtl btbcm btintel snd_seq snd_pcm bluetooth uvcvideo videobuf2_vmalloc videobuf2_memops hid_multitouch videobuf2_core joydev v4l2_common videodev input_leds media snd_seq_device snd_timer snd
  [   22.109657] Modules linked in: rfcomm ctr ccm bnep arc4 drbg ansi_cprng nls_iso8859_1 dm_crypt dell_wmi sparse_keymap intel_rapl iosf_mbi x86_pkg_temp_thermal intel_powerclamp dell_laptop coretemp kvm_intel dcdbas dell_smm_hwmon kvm crct10dif_pclmul crc32_pclmul aesni_intel aes_x86_64 lrw gf128mul iwlmvm glue_helper ablk_helper cryptd mac80211 serio_raw snd_hda_codec_hdmi iwlwifi cfg80211 snd_hda_codec_realtek snd_hda_codec_generic lpc_ich rtsx_pci_ms snd_usb_audio memstick snd_seq_midi snd_usbmidi_lib snd_hda_intel snd_seq_midi_event snd_hda_codec shpchp mei_me snd_hda_core snd_hwdep mei snd_rawmidi btusb btrtl btbcm btintel snd_seq snd_pcm bluetooth uvcvideo videobuf2_vmalloc videobuf2_memops hid_multitouch videobuf2_core joydev v4l2_common videodev input_leds media snd_seq_device snd_timer snd
  [   22.138468] Modules linked in: rfcomm ctr ccm bnep arc4 drbg ansi_cprng nls_iso8859_1 dm_crypt dell_wmi sparse_keymap intel_rapl iosf_mbi x86_pkg_temp_thermal intel_powerclamp dell_laptop coretemp kvm_intel dcdbas dell_smm_hwmon kvm crct10dif_pclmul crc32_pclmul aesni_intel aes_x86_64 lrw gf128mul iwlmvm glue_helper ablk_helper cryptd mac80211 serio_raw snd_hda_codec_hdmi iwlwifi cfg80211 snd_hda_codec_realtek snd_hda_codec_generic lpc_ich rtsx_pci_ms snd_usb_audio memstick snd_seq_midi snd_usbmidi_lib snd_hda_intel snd_seq_midi_event snd_hda_codec shpchp mei_me snd_hda_core snd_hwdep mei snd_rawmidi btusb btrtl btbcm btintel snd_seq snd_pcm bluetooth uvcvideo videobuf2_vmalloc videobuf2_memops hid_multitouch videobuf2_core joydev v4l2_common videodev input_leds media snd_seq_device snd_timer snd
  [   23.420925] Modules linked in: rfcomm ctr ccm bnep arc4 drbg ansi_cprng nls_iso8859_1 dm_crypt dell_wmi sparse_keymap intel_rapl iosf_mbi x86_pkg_temp_thermal intel_powerclamp dell_laptop coretemp kvm_intel dcdbas dell_smm_hwmon kvm crct10dif_pclmul crc32_pclmul aesni_intel aes_x86_64 lrw gf128mul iwlmvm glue_helper ablk_helper cryptd mac80211 serio_raw snd_hda_codec_hdmi iwlwifi cfg80211 snd_hda_codec_realtek snd_hda_codec_generic lpc_ich rtsx_pci_ms snd_usb_audio memstick snd_seq_midi snd_usbmidi_lib snd_hda_intel snd_seq_midi_event snd_hda_codec shpchp mei_me snd_hda_core snd_hwdep mei snd_rawmidi btusb btrtl btbcm btintel snd_seq snd_pcm bluetooth uvcvideo videobuf2_vmalloc videobuf2_memops hid_multitouch videobuf2_core joydev v4l2_common videodev input_leds media snd_seq_device snd_timer snd
  [   23.450028] Modules linked in: rfcomm ctr ccm bnep arc4 drbg ansi_cprng nls_iso8859_1 dm_crypt dell_wmi sparse_keymap intel_rapl iosf_mbi x86_pkg_temp_thermal intel_powerclamp dell_laptop coretemp kvm_intel dcdbas dell_smm_hwmon kvm crct10dif_pclmul crc32_pclmul aesni_intel aes_x86_64 lrw gf128mul iwlmvm glue_helper ablk_helper cryptd mac80211 serio_raw snd_hda_codec_hdmi iwlwifi cfg80211 snd_hda_codec_realtek snd_hda_codec_generic lpc_ich rtsx_pci_ms snd_usb_audio memstick snd_seq_midi snd_usbmidi_lib snd_hda_intel snd_seq_midi_event snd_hda_codec shpchp mei_me snd_hda_core snd_hwdep mei snd_rawmidi btusb btrtl btbcm btintel snd_seq snd_pcm bluetooth uvcvideo videobuf2_vmalloc videobuf2_memops hid_multitouch videobuf2_core joydev v4l2_common videodev input_leds media snd_seq_device snd_timer snd
  [   25.359725] iwlwifi 0000:08:00.0: Queue 2 stuck for 10000 ms.
  [   25.359732] iwlwifi 0000:08:00.0: Current SW read_ptr 51 write_ptr 121
  [   25.359765] iwl data: 00000000: 07 00 00 00 00 00 00 00 00 00 f8 ff 00 00 00 00  ................
  [   25.359786] iwlwifi 0000:08:00.0: FH TRBs(0) = 0x00000000
  [   25.359799] iwlwifi 0000:08:00.0: FH TRBs(1) = 0x80102042
  [   25.359812] iwlwifi 0000:08:00.0: FH TRBs(2) = 0x00000000
  [   25.359825] iwlwifi 0000:08:00.0: FH TRBs(3) = 0x80300006
  [   25.359838] iwlwifi 0000:08:00.0: FH TRBs(4) = 0x00000000
  [   25.359851] iwlwifi 0000:08:00.0: FH TRBs(5) = 0x00000000
  [   25.359864] iwlwifi 0000:08:00.0: FH TRBs(6) = 0x00000000
  [   25.359877] iwlwifi 0000:08:00.0: FH TRBs(7) = 0x00709062
  [   25.359929] iwlwifi 0000:08:00.0: Q 0 is active and mapped to fifo 3 ra_tid 0x0000 [7,7]
  [   25.359987] iwlwifi 0000:08:00.0: Q 1 is active and mapped to fifo 2 ra_tid 0x0000 [0,0]
  [   25.360038] iwlwifi 0000:08:00.0: Q 2 is active and mapped to fifo 1 ra_tid 0x0000 [51,121]
  [   25.360090] iwlwifi 0000:08:00.0: Q 3 is active and mapped to fifo 0 ra_tid 0x0000 [0,0]
  [   25.360142] iwlwifi 0000:08:00.0: Q 4 is inactive and mapped to fifo 0 ra_tid 0x0000 [0,0]
  [   25.360193] iwlwifi 0000:08:00.0: Q 5 is inactive and mapped to fifo 0 ra_tid 0x0000 [0,0]
  [   25.360245] iwlwifi 0000:08:00.0: Q 6 is inactive and mapped to fifo 0 ra_tid 0x0000 [0,0]
  [   25.360296] iwlwifi 0000:08:00.0: Q 7 is inactive and mapped to fifo 0 ra_tid 0x0000 [0,0]
  [   25.360347] iwlwifi 0000:08:00.0: Q 8 is active and mapped to fifo 3 ra_tid 0x0000 [0,0]
  [   25.360399] iwlwifi 0000:08:00.0: Q 9 is active and mapped to fifo 7 ra_tid 0x0000 [99,99]
  [   25.360450] iwlwifi 0000:08:00.0: Q 10 is inactive and mapped to fifo 0 ra_tid 0x0000 [0,0]
  [   25.360502] iwlwifi 0000:08:00.0: Q 11 is inactive and mapped to fifo 0 ra_tid 0x0000 [0,0]
  [   25.360554] iwlwifi 0000:08:00.0: Q 12 is inactive and mapped to fifo 0 ra_tid 0x0000 [0,0]
  [   25.360605] iwlwifi 0000:08:00.0: Q 13 is inactive and mapped to fifo 0 ra_tid 0x0000 [0,0]
  [   25.360656] iwlwifi 0000:08:00.0: Q 14 is inactive and mapped to fifo 0 ra_tid 0x0000 [0,0]
  [   25.360708] iwlwifi 0000:08:00.0: Q 15 is active and mapped to fifo 5 ra_tid 0x0000 [0,0]
  [   25.360759] iwlwifi 0000:08:00.0: Q 16 is inactive and mapped to fifo 0 ra_tid 0x0000 [0,0]
  [   25.360811] iwlwifi 0000:08:00.0: Q 17 is inactive and mapped to fifo 0 ra_tid 0x0000 [0,0]
  [   25.360862] iwlwifi 0000:08:00.0: Q 18 is inactive and mapped to fifo 0 ra_tid 0x0000 [0,0]
  [   25.360914] iwlwifi 0000:08:00.0: Q 19 is inactive and mapped to fifo 0 ra_tid 0x0000 [0,0]
  [   25.360966] iwlwifi 0000:08:00.0: Microcode SW error detected.  Restarting 0x2000000.
  [   25.360970] iwlwifi 0000:08:00.0: CSR values:
  [   25.360972] iwlwifi 0000:08:00.0: (2nd byte of CSR_INT_COALESCING is CSR_INT_PERIODIC_REG)
  [   25.360986] iwlwifi 0000:08:00.0:        CSR_HW_IF_CONFIG_REG: 0X40489204
  [   25.361000] iwlwifi 0000:08:00.0:          CSR_INT_COALESCING: 0X80000040
  [   25.361013] iwlwifi 0000:08:00.0:                     CSR_INT: 0X00000000
  [   25.361027] iwlwifi 0000:08:00.0:                CSR_INT_MASK: 0X00000000
  [   25.361041] iwlwifi 0000:08:00.0:           CSR_FH_INT_STATUS: 0X00000000
  [   25.361055] iwlwifi 0000:08:00.0:                 CSR_GPIO_IN: 0X00000000
  [   25.361069] iwlwifi 0000:08:00.0:                   CSR_RESET: 0X00000000
  [   25.361082] iwlwifi 0000:08:00.0:                CSR_GP_CNTRL: 0X080403c5
  [   25.361096] iwlwifi 0000:08:00.0:                  CSR_HW_REV: 0X00000144
  [   25.361110] iwlwifi 0000:08:00.0:              CSR_EEPROM_REG: 0X00000000
  [   25.361124] iwlwifi 0000:08:00.0:               CSR_EEPROM_GP: 0X80000000
  [   25.361137] iwlwifi 0000:08:00.0:              CSR_OTP_GP_REG: 0X803a0000
  [   25.361151] iwlwifi 0000:08:00.0:                 CSR_GIO_REG: 0X001f0042
  [   25.361165] iwlwifi 0000:08:00.0:            CSR_GP_UCODE_REG: 0X00000000
  [   25.361179] iwlwifi 0000:08:00.0:           CSR_GP_DRIVER_REG: 0X00000000
  [   25.361192] iwlwifi 0000:08:00.0:           CSR_UCODE_DRV_GP1: 0X00000000
  [   25.361206] iwlwifi 0000:08:00.0:           CSR_UCODE_DRV_GP2: 0X00000000
  [   25.361220] iwlwifi 0000:08:00.0:                 CSR_LED_REG: 0X00000060
  [   25.361234] iwlwifi 0000:08:00.0:        CSR_DRAM_INT_TBL_REG: 0X880b8dba
  [   25.361248] iwlwifi 0000:08:00.0:        CSR_GIO_CHICKEN_BITS: 0X27800200
  [   25.361262] iwlwifi 0000:08:00.0:             CSR_ANA_PLL_CFG: 0Xd55555d5
  [   25.361275] iwlwifi 0000:08:00.0:      CSR_MONITOR_STATUS_REG: 0X3d0801bd
  [   25.361289] iwlwifi 0000:08:00.0:           CSR_HW_REV_WA_REG: 0X0001001a
  [   25.361303] iwlwifi 0000:08:00.0:        CSR_DBG_HPET_MEM_REG: 0Xffff0000
  [   25.361305] iwlwifi 0000:08:00.0: FH register values:
  [   25.361326] iwlwifi 0000:08:00.0:         FH_RSCSR_CHNL0_STTS_WPTR_REG: 0X230fe700
  [   25.361339] iwlwifi 0000:08:00.0:        FH_RSCSR_CHNL0_RBDCB_BASE_REG: 0X0230fe60
  [   25.361351] iwlwifi 0000:08:00.0:                  FH_RSCSR_CHNL0_WPTR: 0X000000f0
  [   25.361364] iwlwifi 0000:08:00.0:         FH_MEM_RCSR_CHNL0_CONFIG_REG: 0X00801114
  [   25.361377] iwlwifi 0000:08:00.0:          FH_MEM_RSSR_SHARED_CTRL_REG: 0X000000fc
  [   25.361390] iwlwifi 0000:08:00.0:            FH_MEM_RSSR_RX_STATUS_REG: 0X03030000
  [   25.361403] iwlwifi 0000:08:00.0:    FH_MEM_RSSR_RX_ENABLE_ERR_IRQ2DRV: 0X00000000
  [   25.361416] iwlwifi 0000:08:00.0:                FH_TSSR_TX_STATUS_REG: 0X07ff0001
  [   25.361429] iwlwifi 0000:08:00.0:                 FH_TSSR_TX_ERROR_REG: 0X00000000
  [   25.361541] iwlwifi 0000:08:00.0: Start IWL Error Log Dump:
  [   25.361544] iwlwifi 0000:08:00.0: Status: 0x00000000, count: 6
  [   25.361547] iwlwifi 0000:08:00.0: Loaded firmware version: 25.30.13.0
  [   25.361550] iwlwifi 0000:08:00.0: 0x00000084 | NMI_INTERRUPT_UNKNOWN       
  [   25.361552] iwlwifi 0000:08:00.0: 0x00800634 | uPc
  [   25.361555] iwlwifi 0000:08:00.0: 0x00000000 | branchlink1
  [   25.361557] iwlwifi 0000:08:00.0: 0x00000B2E | branchlink2
  [   25.361559] iwlwifi 0000:08:00.0: 0x0001623C | interruptlink1
  [   25.361562] iwlwifi 0000:08:00.0: 0x000094F2 | interruptlink2
  [   25.361564] iwlwifi 0000:08:00.0: 0x00000000 | data1
  [   25.361566] iwlwifi 0000:08:00.0: 0x00000080 | data2
  [   25.361569] iwlwifi 0000:08:00.0: 0x07030000 | data3
  [   25.361571] iwlwifi 0000:08:00.0: 0xFFFBB960 | beacon time
  [   25.361573] iwlwifi 0000:08:00.0: 0x4E52984C | tsf low
  [   25.361575] iwlwifi 0000:08:00.0: 0x00000009 | tsf hi
  [   25.361577] iwlwifi 0000:08:00.0: 0x00000000 | time gp1
  [   25.361579] iwlwifi 0000:08:00.0: 0x00D3F64C | time gp2
  [   25.361581] iwlwifi 0000:08:00.0: 0x00000000 | time gp3
  [   25.361583] iwlwifi 0000:08:00.0: 0x0004191E | uCode version
  [   25.361585] iwlwifi 0000:08:00.0: 0x00000144 | hw version
  [   25.361587] iwlwifi 0000:08:00.0: 0x40489204 | board version
  [   25.361590] iwlwifi 0000:08:00.0: 0x0233001C | hcmd
  [   25.361592] iwlwifi 0000:08:00.0: 0xA4022002 | isr0
  [   25.361594] iwlwifi 0000:08:00.0: 0x00800000 | isr1
  [   25.361596] iwlwifi 0000:08:00.0: 0x00000002 | isr2
  [   25.361598] iwlwifi 0000:08:00.0: 0x004120C4 | isr3
  [   25.361600] iwlwifi 0000:08:00.0: 0x00000000 | isr4
  [   25.361602] iwlwifi 0000:08:00.0: 0x00000110 | isr_pref
  [   25.361604] iwlwifi 0000:08:00.0: 0x00000000 | wait_event
  [   25.361606] iwlwifi 0000:08:00.0: 0x00000080 | l2p_control
  [   25.361609] iwlwifi 0000:08:00.0: 0x00012030 | l2p_duration
  [   25.361611] iwlwifi 0000:08:00.0: 0x0000003F | l2p_mhvalid
  [   25.361613] iwlwifi 0000:08:00.0: 0x00000080 | l2p_addr_match
  [   25.361615] iwlwifi 0000:08:00.0: 0x00000005 | lmpm_pmg_sel
  [   25.361618] iwlwifi 0000:08:00.0: 0x17061509 | timestamp
  [   25.361620] iwlwifi 0000:08:00.0: 0x0034F000 | flow_handler
  [   25.497461] iwlwifi 0000:08:00.0: L1 Enabled - LTR Enabled
  [   25.497702] iwlwifi 0000:08:00.0: L1 Enabled - LTR Enabled
  [   25.716368] iwlwifi 0000:08:00.0: L1 Enabled - LTR Enabled
  [   25.716609] iwlwifi 0000:08:00.0: L1 Enabled - LTR Enabled
  --- 
  ApportVersion: 2.19.1-0ubuntu5
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC1:  rodrigo    2535 F.... pulseaudio
   /dev/snd/controlC0:  rodrigo    2535 F.... pulseaudio
  CurrentDesktop: Unity
  DistroRelease: Ubuntu 15.10
  EcryptfsInUse: Yes
  HibernationDevice: RESUME=UUID=f2fa2c1b-b0a9-4280-b27b-82d0a3eade29
  InstallationDate: Installed on 2015-11-30 (21 days ago)
  InstallationMedia: Ubuntu 15.10 "Wily Werewolf" - Release amd64 (20151021)
  MachineType: Dell Inc. Vostro 5470
  Package: linux (not installed)
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.2.0-21-generic.efi.signed root=UUID=5f70df59-af6d-49a7-a20c-9b80ea3fe672 ro noprompt persistent quiet splash vt.handoff=7
  ProcVersionSignature: Ubuntu 4.2.0-21.25-generic 4.2.6
  RelatedPackageVersions:
   linux-restricted-modules-4.2.0-21-generic N/A
   linux-backports-modules-4.2.0-21-generic  N/A
   linux-firmware                            1.149.3
  Tags:  wily
  UdevLog: Error: [Errno 2] No such file or directory: '/var/log/udev'
  Uname: Linux 4.2.0-21-generic x86_64
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo
  _MarkForUpload: True
  dmi.bios.date: 04/24/2014
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: A08
  dmi.board.name: 0DW7DY
  dmi.board.vendor: Dell Inc.
  dmi.board.version: A00
  dmi.chassis.type: 8
  dmi.chassis.vendor: Dell Inc.
  dmi.chassis.version: 0.1
  dmi.modalias: dmi:bvnDellInc.:bvrA08:bd04/24/2014:svnDellInc.:pnVostro5470:pvr:rvnDellInc.:rn0DW7DY:rvrA00:cvnDellInc.:ct8:cvr0.1:
  dmi.product.name: Vostro 5470
  dmi.sys.vendor: Dell Inc.

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References

[Bug 1527444] [NEW] Intel 7260 Wifi not working on Ubuntu 15.10
From: Rodrigo Primo, 2015-12-18