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[Bug 1490551] Re: Wily: hidinput_disconnect BUG: unable to handle kernel NULL pointer derefernce at (null)


Would it be possible for you to test the latest upstream kernel? Refer
to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest
v4.2 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/v4.2-unstable/

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

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  Wily: hidinput_disconnect BUG: unable to handle kernel NULL pointer
  derefernce at (null)

Status in linux package in Ubuntu:

Bug description:
  15.10 amd64, kernel BUG when a Bluetooth mouse disconnected due to
  battery failure - in other words, an uncommanded disconnect.

  $ uname -a
  Linux hephaestion.lan.iam.tj 4.1.0-3-lowlatency #3-Ubuntu SMP PREEMPT Tue Jul 28 13:11:08 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux

  Log attached:

  $ journalctl  -n 48 | awk '{$1="";$2="";$4="";print $0}'
  ApportVersion: 2.18-0ubuntu7
  Architecture: amd64
   /dev/snd/controlC0:  tj         1733 F.... pulseaudio
  CurrentDesktop: LXDE
  DistroRelease: Ubuntu 15.10
  EcryptfsInUse: Yes
  MachineType: Dell Inc. XPS M1530
  NonfreeKernelModules: nvidia
  Package: linux (not installed)
  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.1.0-3-lowlatency root=/dev/mapper/VG_OS-ubuntu_14.04_rootfs ro debug
  ProcVersionSignature: Ubuntu 4.1.0-3.3-lowlatency 4.1.3
   linux-restricted-modules-4.1.0-3-lowlatency N/A
   linux-backports-modules-4.1.0-3-lowlatency  N/A
   linux-firmware                              1.147
  Tags:  wily
  UdevLog: Error: [Errno 2] No such file or directory: '/var/log/udev'
  Uname: Linux 4.1.0-3-lowlatency x86_64
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups: adm sudo
  _MarkForUpload: True
  dmi.bios.date: 11/19/2008
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: A12
  dmi.board.vendor: Dell Inc.
  dmi.chassis.type: 8
  dmi.chassis.vendor: Dell Inc.
  dmi.modalias: dmi:bvnDellInc.:bvrA12:bd11/19/2008:svnDellInc.:pnXPSM1530:pvr:rvnDellInc.:rn:rvr:cvnDellInc.:ct8:cvr:
  dmi.product.name: XPS M1530
  dmi.sys.vendor: Dell Inc.

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