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[Bug 1529497] Re: Frequent iwlwifi crashes


Did this issue start happening after an update/upgrade?  Was there a
prior kernel version where you were not having this particular problem?

Would it be possible for you to test the latest upstream kernel? Refer
to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest
v4.4 kernel[0].

If this bug is fixed in the mainline kernel, please add the following
tag 'kernel-fixed-upstream'.

If the mainline kernel does not fix this bug, please add the tag:

Once testing of the upstream kernel is complete, please mark this bug as

Thanks in advance.

[0] http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.4-rc7-wily

** Package changed: linux-firmware (Ubuntu) => linux (Ubuntu)

** Changed in: linux (Ubuntu)
   Importance: Undecided => Medium

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

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  Frequent iwlwifi crashes

Status in linux package in Ubuntu:

Bug description:
  I experience very frequent wireless network deconnections on my
  laptop.  A typical case is when I close the screen : when I open it
  again, the network is systematically gone.  Sometimes it's just that
  the wifi options won't show up in NetworkManager dropdown menu, but on
  other occasions the menu says that the wifi has been turned off with a
  hardware switch (there is no such switch on the laptop).

  Syslog shows crashes related to iwlwifi (search for "Trace" in the
  attached file).

  Sorry for the poor report, but I don't have much time to narrow down
  the issue.  Of course I can add whichever information is needed.

  fang@MiniFang:~$ LANG=en_US lsb_release -rd
  Description:	Ubuntu 14.04.3 LTS
  Release:	14.04
  fang@MiniFang:~$ LANG=en_US apt-cache policy linux-firmware
    Installed: 1.127.19
    Candidate: 1.127.19
    Version table:
   *** 1.127.19 0
          500 http://fr.archive.ubuntu.com/ubuntu/ trusty-updates/main amd64 Packages
          100 /var/lib/dpkg/status
       1.127.18 0
          500 http://security.ubuntu.com/ubuntu/ trusty-security/main amd64 Packages
       1.127 0
          500 http://fr.archive.ubuntu.com/ubuntu/ trusty/main amd64 Packages
  fang@MiniFang:~$ sudo LANG=en_US lshw -C network
         description: Wireless interface
         product: Wireless 7260
         vendor: Intel Corporation
         physical id: 0
         bus info: pci@0000:02:00.0
         logical name: wlan0
         version: c3
         serial: 48:51:b7:e1:26:b6
         width: 64 bits
         clock: 33MHz
         capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless
         configuration: broadcast=yes driver=iwlwifi driverversion=3.19.0-42-generic firmware= ip= latency=0 link=yes multicast=yes wireless=IEEE 802.11bgn
         resources: irq:52 memory:f7100000-f7101fff
         description: Ethernet interface
         product: RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller
         vendor: Realtek Semiconductor Co., Ltd.
         physical id: 0.1
         bus info: pci@0000:03:00.1
         logical name: eth0
         version: 12
         serial: 80:fa:5b:14:57:4b
         size: 10Mbit/s
         capacity: 1Gbit/s
         width: 64 bits
         clock: 33MHz
         capabilities: pm msi pciexpress msix vpd bus_master cap_list ethernet physical tp mii 10bt 10bt-fd 100bt 100bt-fd 1000bt 1000bt-fd autonegotiation
         configuration: autonegotiation=on broadcast=yes driver=r8169 driverversion=2.3LK-NAPI duplex=half firmware=rtl8411-2_0.0.1 07/08/13 latency=0 link=no multicast=yes port=MII speed=10Mbit/s
         resources: irq:48 ioport:e000(size=256) memory:f7014000-f7014fff memory:f7010000-f7013fff

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: linux-firmware 1.127.19
  ProcVersionSignature: Ubuntu 3.19.0-42.48~14.04.1-generic 3.19.8-ckt10
  Uname: Linux 3.19.0-42-generic x86_64
  ApportVersion: 2.14.1-0ubuntu3.19
  Architecture: amd64
  CurrentDesktop: Unity
  Date: Sun Dec 27 18:30:50 2015
  InstallationDate: Installed on 2015-08-20 (128 days ago)
  InstallationMedia: Ubuntu 14.04.3 LTS "Trusty Tahr" - Beta amd64 (20150805)
  PackageArchitecture: all
  SourcePackage: linux-firmware
  UpgradeStatus: No upgrade log present (probably fresh install)

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