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[Bug 1421366] Status changed to Confirmed

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** Changed in: linux (Ubuntu)
       Status: New => Confirmed

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https://bugs.launchpad.net/bugs/1421366

Title:
  wifi works unstable

Status in linux package in Ubuntu:
  Confirmed

Bug description:
  Hello!
  My wifi works unstable. It means network goes down time to time. And it makes me crazy. I am not sure where to find a cause but I found strange errors in dmesg
  [   16.264702] iwlwifi 0000:05:00.0: can't disable ASPM; OS doesn't have ASPM control
  [   16.265640] iwlwifi 0000:05:00.0: irq 48 for MSI/MSI-X
  [   16.598809] iwlwifi 0000:05:00.0: loaded firmware version 8.24.2.2 op_mode iwldvm
  [   16.628704] iwlwifi 0000:05:00.0: CONFIG_IWLWIFI_DEBUG disabled
  [   16.628706] iwlwifi 0000:05:00.0: CONFIG_IWLWIFI_DEBUGFS enabled
  [   16.628707] iwlwifi 0000:05:00.0: CONFIG_IWLWIFI_DEVICE_TRACING enabled
  [   16.628709] iwlwifi 0000:05:00.0: Detected Intel(R) WiMAX/WiFi Link 5150 ABG, REV=0x44
  [   16.629218] iwlwifi 0000:05:00.0: L1 Enabled - LTR Disabled
  [   22.416806] iwlwifi 0000:05:00.0: L1 Enabled - LTR Disabled
  [   22.419871] iwlwifi 0000:05:00.0: Radio type=0x1-0x1-0x0
  [   22.542892] iwlwifi 0000:05:00.0: L1 Enabled - LTR Disabled
  [   22.546075] iwlwifi 0000:05:00.0: Radio type=0x1-0x1-0x0
  [   48.073232] iwlwifi 0000:05:00.0: Microcode SW error detected.  Restarting 0x2000000.
  [   48.073308] iwlwifi 0000:05:00.0: CSR values:
  [   48.073310] iwlwifi 0000:05:00.0: (2nd byte of CSR_INT_COALESCING is CSR_INT_PERIODIC_REG)
  [   48.073335] iwlwifi 0000:05:00.0:        CSR_HW_IF_CONFIG_REG: 0X00484704
  [   48.073360] iwlwifi 0000:05:00.0:          CSR_INT_COALESCING: 0X00000040
  [   48.073369] iwlwifi 0000:05:00.0:                     CSR_INT: 0X00000000
  [   48.073377] iwlwifi 0000:05:00.0:                CSR_INT_MASK: 0X00000000
  [   48.073386] iwlwifi 0000:05:00.0:           CSR_FH_INT_STATUS: 0X00000000
  [   48.073394] iwlwifi 0000:05:00.0:                 CSR_GPIO_IN: 0X00000000
  [   48.073403] iwlwifi 0000:05:00.0:                   CSR_RESET: 0X00000000
  [   48.073412] iwlwifi 0000:05:00.0:                CSR_GP_CNTRL: 0X080403c5
  [   48.073420] iwlwifi 0000:05:00.0:                  CSR_HW_REV: 0X00000044
  [   48.073429] iwlwifi 0000:05:00.0:              CSR_EEPROM_REG: 0X00000000
  [   48.073438] iwlwifi 0000:05:00.0:               CSR_EEPROM_GP: 0X90000804
  [   48.073446] iwlwifi 0000:05:00.0:              CSR_OTP_GP_REG: 0X00020000
  [   48.073455] iwlwifi 0000:05:00.0:                 CSR_GIO_REG: 0X00080042
  [   48.073464] iwlwifi 0000:05:00.0:            CSR_GP_UCODE_REG: 0X0000199b
  [   48.073472] iwlwifi 0000:05:00.0:           CSR_GP_DRIVER_REG: 0X00000000
  [   48.073481] iwlwifi 0000:05:00.0:           CSR_UCODE_DRV_GP1: 0X00000000
  [   48.073506] iwlwifi 0000:05:00.0:           CSR_UCODE_DRV_GP2: 0X00000000
  [   48.073514] iwlwifi 0000:05:00.0:                 CSR_LED_REG: 0X00000040
  [   48.073523] iwlwifi 0000:05:00.0:        CSR_DRAM_INT_TBL_REG: 0X88070876
  [   48.073531] iwlwifi 0000:05:00.0:        CSR_GIO_CHICKEN_BITS: 0X27800200
  [   48.073540] iwlwifi 0000:05:00.0:             CSR_ANA_PLL_CFG: 0X00880300
  [   48.073549] iwlwifi 0000:05:00.0:           CSR_HW_REV_WA_REG: 0X0001001a
  [   48.073573] iwlwifi 0000:05:00.0:        CSR_DBG_HPET_MEM_REG: 0Xffff0000
  [   48.073576] iwlwifi 0000:05:00.0: FH register values:
  [   48.073628] iwlwifi 0000:05:00.0:         FH_RSCSR_CHNL0_STTS_WPTR_REG: 0X07242000
  [   48.073675] iwlwifi 0000:05:00.0:        FH_RSCSR_CHNL0_RBDCB_BASE_REG: 0X0071b6c0
  [   48.073694] iwlwifi 0000:05:00.0:                  FH_RSCSR_CHNL0_WPTR: 0X00000080
  [   48.073713] iwlwifi 0000:05:00.0:         FH_MEM_RCSR_CHNL0_CONFIG_REG: 0X80801114
  [   48.073733] iwlwifi 0000:05:00.0:          FH_MEM_RSSR_SHARED_CTRL_REG: 0X000000fc
  [   48.073752] iwlwifi 0000:05:00.0:            FH_MEM_RSSR_RX_STATUS_REG: 0X07030000
  [   48.073765] iwlwifi 0000:05:00.0:    FH_MEM_RSSR_RX_ENABLE_ERR_IRQ2DRV: 0X00000000
  [   48.073779] iwlwifi 0000:05:00.0:                FH_TSSR_TX_STATUS_REG: 0X07ff0001
  [   48.073798] iwlwifi 0000:05:00.0:                 FH_TSSR_TX_ERROR_REG: 0X00000000
  [   48.073802] iwlwifi 0000:05:00.0: Loaded firmware version: 8.24.2.2
  [   48.073937] iwlwifi 0000:05:00.0: Start IWL Error Log Dump:
  [   48.073939] iwlwifi 0000:05:00.0: Status: 0x0000004C, count: 5
  [   48.073942] iwlwifi 0000:05:00.0: 0x00000004 | NMI_INTERRUPT_WDG           
  [   48.073944] iwlwifi 0000:05:00.0: 0x000006F4 | uPc
  [   48.073946] iwlwifi 0000:05:00.0: 0x000005BA | branchlink1
  [   48.073949] iwlwifi 0000:05:00.0: 0x000006F8 | branchlink2
  [   48.073951] iwlwifi 0000:05:00.0: 0x000008C2 | interruptlink1
  [   48.073953] iwlwifi 0000:05:00.0: 0x00005B02 | interruptlink2
  [   48.073955] iwlwifi 0000:05:00.0: 0x00000002 | data1
  [   48.073957] iwlwifi 0000:05:00.0: 0x07030000 | data2
  [   48.073959] iwlwifi 0000:05:00.0: 0x00000068 | line
  [   48.073961] iwlwifi 0000:05:00.0: 0x35C02C5A | beacon time
  [   48.073963] iwlwifi 0000:05:00.0: 0x8BCA63A6 | tsf low
  [   48.073965] iwlwifi 0000:05:00.0: 0x0000005A | tsf hi
  [   48.073967] iwlwifi 0000:05:00.0: 0x00000000 | time gp1
  [   48.073970] iwlwifi 0000:05:00.0: 0x01855040 | time gp2
  [   48.073972] iwlwifi 0000:05:00.0: 0x00000000 | time gp3
  [   48.073974] iwlwifi 0000:05:00.0: 0x00010818 | uCode version
  [   48.073976] iwlwifi 0000:05:00.0: 0x00000000 | hw version
  [   48.073978] iwlwifi 0000:05:00.0: 0x00484704 | board version
  [   48.073980] iwlwifi 0000:05:00.0: 0x00000002 | hcmd

  May be it is a dublicate of https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1099487
  And wifi does not work after waking up at all. I do not know any work arounds. Please feel free to contact me. I love ubuntu and ready to help.

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: linux-image-3.13.0-45-generic 3.13.0-45.74
  ProcVersionSignature: Ubuntu 3.13.0-45.74-generic 3.13.11-ckt13
  Uname: Linux 3.13.0-45-generic x86_64
  ApportVersion: 2.14.1-0ubuntu3.6
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  ts         1475 F.... pulseaudio
  CRDA:
   country RU:
   	(2402 - 2482 @ 40), (N/A, 20)
   	(5735 - 5835 @ 20), (N/A, 30)
  CurrentDesktop: Unity
  Date: Thu Feb 12 22:22:48 2015
  HibernationDevice: RESUME=UUID=0b240f70-b31e-4a9c-a34d-1de66cf1d394
  InstallationDate: Installed on 2015-02-08 (3 days ago)
  InstallationMedia: Ubuntu 14.04.1 LTS "Trusty Tahr" - Release amd64 (20140722.2)
  MachineType: LENOVO 2874RV4
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-45-generic root=UUID=6cb89af7-7e1c-4430-b5d7-1a1e4a6a1675 ro quiet splash vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-3.13.0-45-generic N/A
   linux-backports-modules-3.13.0-45-generic  N/A
   linux-firmware                             1.127.11
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 04/30/2010
  dmi.bios.vendor: LENOVO
  dmi.bios.version: 6JET77WW (1.35 )
  dmi.board.name: 2874RV4
  dmi.board.vendor: LENOVO
  dmi.board.version: Not Available
  dmi.chassis.asset.tag: No Asset Information
  dmi.chassis.type: 10
  dmi.chassis.vendor: LENOVO
  dmi.chassis.version: Not Available
  dmi.modalias: dmi:bvnLENOVO:bvr6JET77WW(1.35):bd04/30/2010:svnLENOVO:pn2874RV4:pvrThinkPadSL410:rvnLENOVO:rn2874RV4:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable:
  dmi.product.name: 2874RV4
  dmi.product.version: ThinkPad SL410
  dmi.sys.vendor: LENOVO

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References

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