kernel-packages team mailing list archive

[Sergio Callegari <sergio.callegari@xxxxxxxxx>]

Actually, there should be no need to ask for the ubuntu-bug report to
users that are merely confirming a bug for which everything is already
known and everyone is merely waiting for Gianluca Anzolin's patches to
land on the stable update kernel channels.

BTW, ubuntu-bug is quite buggy itself. I guess this is why many people
do not use it.  See
https://bugs.launchpad.net/ubuntu/+source/apport/+bug/642631 and
https://bugs.launchpad.net/ubuntu/+source/apport/+bug/1200124. Having
ubuntu-bug fixed would be the best incentive to push people to use it.
No one likes using a tool that evidently has issues and at the same time
asks you for the root password.

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https://bugs.launchpad.net/bugs/1165433

Title:
  Kernel 3.8.x panics on bluetooth DUN disconnect

Status in “linux” package in Ubuntu:
  Incomplete

Bug description:
  Issue is obviously in the kernel that should not panic in any circumnstances.
  This bug is seen on quantal using the kernel from PPA mainline. Tested with 3.8.0 to 3.8.6.
  Since 3.8.x is going to be the raring kernel I believe that this should definitely be fixed before raring is shipped.

  Seen on:

  DELL E6500 with kubuntu quantal 12.10 64 bit and as said, kernel 3.8.6 from the mainline ppa.
  The machine has a Dell Computer Corp. Wireless 370 Bluetooth Mini-card (connected via an internal usb connection).

  The issue is shown when connecting to the internet via a Samsung Galaxy S plus phone, using a bluetooth DUN connection.
  It is reproducible every time.

  How to reproduce:

  1) Use the bluetooth applet to discover the phone and associate to it.
  2) Use network manager to setup a DUN connection with the phone through your APN
  3) Connect to the internet via bluetooth DUN (connection works perfectly)
  4) Disconnect from the network manager.

  At the same time you disconnect, the GUI session is terminated and the
  kernel panics, briefly showing a panic log on the screen.

  Note that:

  a) The issue is not present using the standard ubuntu quantal kernel
  b) The issue is not present using kernels from the mainline ppa before 3.8 (e.g., 3.7.x is fine for all x)
  c) The issue is not present when connecting to the internet using a USB mobile dongle (e.g. Huawei usb key)

  This looks pretty serious to me: kernel does not sync when panicing
  and there is a serious risk of data loss; connecting to the internet
  via a smart phone using bluetooth DUN seems to be something that one
  should take for granted on any modern OS. Furthermore, points a) and
  b) above show that this is a *regression* over previous kernels.

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