[Bug 557458] [NEW] Unplugging homebrew LIRC receiver causes kernel malfunction

[Anton Eliasson]

Public bug reported:

I've built an IR receiver, emulating the LIRC-compatible Igor Cesko USB-receiver. After plugging it in, I can watch the incoming IR-commands in /dev/lirc0. But when I unplug it, I get this message about a "serious problem in the kernel, Your system might become unstable now and might need to be restarted", I don't know the exact message in English since my system uses Swedish. New USB-devices are not enumerated and does not appear in /dev until I reboot.
I wasn't able to report this after the kernel "crash" because Apport wouldn't run so I am sending this after a reboot using ubuntu-bug. dmesg seems to contain a lot of errors, I'll attach a log below. This occurs both with and without the "lirc" package installed. I can reproduce this anytime by just replugging the USB device. No idea if this is a regression, but if it helps, I can test it with any kernel after 2.6.32-11 (currently running Lucid beta, kernel 2.6.32-19)

ProblemType: Bug
DistroRelease: Ubuntu 10.04
Package: linux-image-2.6.32-19-generic-pae 2.6.32-19.28
Regression: No
Reproducible: Yes
ProcVersionSignature: Ubuntu 2.6.32-19.28-generic-pae 2.6.32.10+drm33.1
Uname: Linux 2.6.32-19-generic-pae i686
NonfreeKernelModules: nvidia
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.21.
Architecture: i386
ArecordDevices:
 **** List of CAPTURE Hardware Devices ****
 card 0: Intel [HDA Intel], device 0: STAC92xx Analog [STAC92xx Analog]
   Subdevices: 1/1
   Subdevice #0: subdevice #0
AudioDevicesInUse:
 USER        PID ACCESS COMMAND
 /dev/snd/controlC0:  anton      1866 F.... pulseaudio
CRDA: Error: [Errno 2] No such file or directory
Card0.Amixer.info:
 Card hw:0 'Intel'/'HDA Intel at 0xefffc000 irq 21'
   Mixer name	: 'SigmaTel STAC9200'
   Components	: 'HDA:83847690,102801cd,00102201'
   Controls      : 13
   Simple ctrls  : 7
Date: Wed Apr  7 19:10:21 2010
HibernationDevice: RESUME=UUID=da0d99f1-647c-4424-adf9-2498556ed4f8
InstallationMedia: Ubuntu 10.04 "Lucid Lynx" - Alpha i386 (20100113)
MachineType: Dell Inc. MP061
ProcCmdLine: BOOT_IMAGE=/vmlinuz-2.6.32-19-generic-pae root=UUID=58ab6876-1ac1-4010-bae8-2f10f614de71 ro quiet splash nomodeset
ProcEnviron:
 SHELL=/bin/bash
 LANG=sv_SE.utf8
 LANGUAGE=sv_SE:sv:en_GB:en
RelatedPackageVersions: linux-firmware 1.33
SourcePackage: linux
UserAsoundrc:
 pcm.pulse { type pulse }
 ctl.pulse { type pulse }
dmi.bios.date: 06/27/2007
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A09
dmi.board.name: 0YD479
dmi.board.vendor: Dell Inc.
dmi.chassis.type: 8
dmi.chassis.vendor: Dell Inc.
dmi.modalias: dmi:bvnDellInc.:bvrA09:bd06/27/2007:svnDellInc.:pnMP061:pvr:rvnDellInc.:rn0YD479:rvr:cvnDellInc.:ct8:cvr:
dmi.product.name: MP061
dmi.sys.vendor: Dell Inc.

** Affects: linux (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: apport-bug i386 lucid needs-upstream-testing

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Unplugging homebrew LIRC receiver causes kernel malfunction
https://bugs.launchpad.net/bugs/557458
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