0a5c:2148 [Dell Studio XPS 8100] Bluetooth Adapter causes battery level to show on desktop and leads to crash.

[Vince Manapat]

This is happening every few minutes now. A (perhaps) related anomaly is that I am on a desktop computer but my system shows a battery percentage icon.

As I am typing suddenly the input stops and the battery percentage indicator goes to 0. Then I see the kern.log output on my screen. Then the computer reboots. I am using an apple bluetooth keyboard. The last time the problem occurred I quickly plugged in another keyboard and hit CTRL-ALT F1 to file this report. This time I did not have to reboot.

ProblemType: Bug
DistroRelease: Ubuntu 12.10
Package: linux-image-3.5.0-17-generic 3.5.0-17.28
ProcVersionSignature: Ubuntu 3.5.0-17.28-generic 3.5.5
Uname: Linux 3.5.0-17-generic x86_64
ApportVersion: 2.6.1-0ubuntu6
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC1: vince 2116 F.... pulseaudio
 /dev/snd/controlC0: vince 2116 F.... pulseaudio
Date: Sat Nov 3 22:56:25 2012
HibernationDevice: RESUME=UUID=ddbd60a7-0a0c-4889-ad90-81bf85f9062b
InstallationDate: Installed on 2012-10-27 (7 days ago)
InstallationMedia: Ubuntu GNOME Remix 12.10 "Quantal Quetzal" - Release amd64(20121023)
MachineType: Dell Inc. Studio XPS 8100
MarkForUpload: True
ProcEnviron:
 LANGUAGE=en_US:en
 TERM=linux
 PATH=(custom, no user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
ProcFB: 0 nouveaufb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.5.0-17-generic root=UUID=479ebcb2-b79c-4921-ba92-8575844d24a2 ro quiet splash vt.handoff=7
RelatedPackageVersions:
 linux-restricted-modules-3.5.0-17-generic N/A
 linux-backports-modules-3.5.0-17-generic N/A
 linux-firmware 1.95
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 07/08/2010
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A05
dmi.board.name: 0T568R
dmi.board.vendor: Dell Inc.
dmi.board.version: A00
dmi.chassis.type: 3
dmi.chassis.vendor: Dell Inc.
dmi.modalias: dmi:bvnDellInc.:bvrA05:bd07/08/2010:svnDellInc.:pnStudioXPS8100:pvr:rvnDellInc.:rn0T568R:rvrA00:cvnDellInc.:ct3:cvr:
dmi.product.name: Studio XPS 8100
dmi.sys.vendor: Dell Inc.

[Vince Manapat (vmanapat)]

I took out the bluetooth adapter (IOGEAR GBU421) and the battery level no longer shows on my desktop, so the problems are likely related. I used this adapter for months with 12.04 without issue.

[Joseph Salisbury (jsalisbury)]

Would it be possible for you to test the latest upstream kernel? Refer to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest v3.7 kernel[0] (Not a kernel in the daily directory) and install both the linux-image and linux-image-extra .deb packages.

Once you've tested the upstream kernel, please remove the 'needs-upstream-testing' tag. Please only remove that one tag and leave the other tags. This can be done by clicking on the yellow pencil icon next to the tag located at the bottom of the bug description and deleting the 'needs-upstream-testing' text.

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: 'kernel-bug-exists-upstream'.

If you are unable to test the mainline kernel, for example it will not boot, please add the tag: 'kernel-unable-to-test-upstream'.
Once testing of the upstream kernel is complete, please mark this bug as "Confirmed".

Thanks in advance.

[0] http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.7-rc4-raring/

[Vince Manapat (vmanapat)]

Sure, I can test the upstream kernel.

Also, I was able to reproduce the bug using an entirely different bluetooth adapter on a different computer (Macbook Pro 1,1), so the problem isn't that specific to that adapter. Once again the battery level stopped responding and then the computer crashed.

[Vince Manapat (vmanapat)]

This bug is fixed in the v3.7-rc2-quantal kernel and 3.6.3-030603-generic (which I am running right now). It was probably caused by the kernel trying to report the battery health of my keyboard, but in any event it has been fixed upstream.

[KarlRelton (karllinuxtest-relton)]

Vince

Do you know what the actual fix was upstream? As far as I can tell, 3.7 kernels still had this problem (in fact still a problem using 3.8).

The failed battery report is not necessarily a problem per se, but under certain situations (e.g. resume from suspend) can cause a kernel OOPS

[penalvch (penalvch)]

Vince Manapat, could you please confirm this issue exists with the latest development release of Ubuntu? ISO images are available from http://cdimage.ubuntu.com/daily-live/current/ . If the issue remains, could you please run the following command in the development release from a Terminal (Applications->Accessories->Terminal), as it will automatically gather and attach updated debug information to this report:

apport-collect -p linux <replace-with-bug-number>

Also, could you please test the latest upstream kernel available following https://wiki.ubuntu.com/KernelMainlineBuilds ? It will allow additional upstream developers to examine the issue. Please do not test the daily folder, but the one all the way at the bottom. Once you've tested the upstream kernel, please comment on which kernel version specifically you tested. If this bug is fixed in the mainline kernel, please add the following tags:
kernel-fixed-upstream
kernel-fixed-upstream-VERSION-NUMBER

where VERSION-NUMBER is the version number of the kernel you tested. For example:
kernel-fixed-upstream-v3.11-rc4

This can be done by clicking on the yellow circle with a black pencil icon next to the word Tags located at the bottom of the bug description. As well, please remove the tag:
needs-upstream-testing

If the mainline kernel does not fix this bug, please add the following tags:
kernel-bug-exists-upstream
kernel-bug-exists-upstream-VERSION-NUMBER

As well, please remove the tag:
needs-upstream-testing

If you are unable to test the mainline kernel, please comment as to why specifically you were unable to test it and add the following tags:
kernel-unable-to-test-upstream
kernel-unable-to-test-upstream-VERSION-NUMBER

Once testing of the upstream kernel is complete, please mark this bug's Status as Confirmed. Please let us know your results. Thank you for your understanding.

[Launchpad Janitor (janitor)]

[Expired for linux (Ubuntu) because there has been no activity for 60 days.]