[Expired for linux (Ubuntu) because there has been no activity for 60
days.]
** Changed in: linux (Ubuntu)
Status: Incomplete => Expired
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https://bugs.launchpad.net/bugs/1019574
Title:
0471:0311 BUG: unable to handle kernel NULL pointer dereference at
0000000000000050; RIP: 0010:[<ffffffffa0112d6e>] [<ffffffffa0112d6e>]
v4l2_ctrl_s_ctrl+0xe/0x50 [videodev]
Status in “linux” package in Ubuntu:
Expired
Bug description:
Since Ubuntu 12.04,
I get a kernel oops when trying to use the Toucam Pro 2 Philips USB
webcam with Qastrocam-g2 (not part of Ubuntu repos) an astronomy
program that use advanced functions of Philips webcam. Basic usage of
the webcam with cheese is still possible.
It used to work well before.
On AMD64x2 desktop/Ubuntu 12.04 Desktop x86-64, I installed:
- libqwtplot3d-qt3-0_0.2.7+svn191-4_amd64.deb (http://pkgs.org/debian-sid)
- qastrocam-g2_4.8_amd64.deb (sourceforge)
I plug in the Philips Toucam Pro 2 USB webcam.
I run qastrocam-g2, configure it to use the V4L2 device associated with the
Philips Toucam Pro 2 USB webcam in the setting tabs and restart the program. I
get a oops and the system hangs.
Maybe this is the fix (?):
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=ceede9fa8939e40ad0ddb4ad1355f45c6f1d3478
UNAME A for AMD64x2 desktop
Linux saturn 3.2.0-24-generic #39-Ubuntu SMP Mon May 21 16:52:17 UTC 2012
x86_64 x86_64 x86_64 GNU/Linux
I have tested the latest mainline kernel packaged for precise:
linux-image-3.4.0-030400rc6-generic_3.4.0-030400rc6.201205061835_amd64.deb
Note that this package is dated 06-May-2012 and this git commit
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=ceede9fa8939e40ad0ddb4ad1355f45c6f1d3478
is from 09-May-2012, so this kernel doesn't contain the latest fix(es)
on the PWC driver.
With this kernel, I don't get a OOPS with qastrocam-g2 and qastrocam-g2 can
acquire pictures from the Toucam Pro 2.
However, most IOCTL commands used by qastrocam-g2 to set camera parameters
such as the gain are not recognized (see attached console output). This was not
the case in older version of Ubuntu such as 11.10. Interestingly the file
drivers/media/video/pwc/pwc-ioctl.h was removed after kernel 3.0 (
http://git.kernel.org/?p=linux%2Fkernel%2Fgit%2Ftorvalds%2Flinux-2.6.git&a=search&h=HEAD&st=commit&s=pwc-ioctl
) because it was redundant? with include/media/pwc-ioctl.h.
ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: linux-image-3.2.0-24-generic 3.2.0-24.39
ProcVersionSignature: Ubuntu 3.2.0-24.39-generic 3.2.16
Uname: Linux 3.2.0-24-generic x86_64
NonfreeKernelModules: nvidia
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
ApportVersion: 2.0.1-0ubuntu8
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC2: astro 2096 F.... pulseaudio
/dev/snd/controlC0: astro 2096 F.... pulseaudio
/dev/snd/controlC1: astro 2096 F.... pulseaudio
CRDA: Error: command ['iw', 'reg', 'get'] failed with exit code 1: nl80211
not found.
Card0.Amixer.info:
Card hw:0 'NVidia'/'HDA NVidia at 0xfe020000 irq 20'
Mixer name : 'Realtek ALC883'
Components : 'HDA:10ec0883,147b8e01,00100002'
Controls : 48
Simple ctrls : 23
Card1.Amixer.info:
Card hw:1 'CX8811'/'Conexant CX8811 at 0xfa000000'
Mixer name : 'CX88'
Components : ''
Controls : 4
Simple ctrls : 3
Card2.Amixer.info:
Card hw:2 'U0x4710x311'/'USB Device 0x471:0x311 at usb-0000:00:02.1-2.2,
full speed'
Mixer name : 'USB Mixer'
Components : 'USB0471:0311'
Controls : 2
Simple ctrls : 1
Card2.Amixer.values:
Simple mixer control 'Mic',0
Capabilities: cvolume cvolume-joined cswitch cswitch-joined penum
Capture channels: Mono
Limits: Capture 0 - 3
Mono: Capture 1 [33%] [40.00dB] [on]
Date: Thu Jun 7 13:21:09 2012
HibernationDevice: RESUME=UUID=7b300250-5947-480e-ae81-cbd4ae320b01
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release amd64
(20120425)
IwConfig:
lo no wireless extensions.
eth1 no wireless extensions.
eth0 no wireless extensions.
ProcEnviron:
TERM=xterm
SHELL=/bin/bash
PATH=(custom, no user)
LANG=en_US.UTF-8
ProcFB: 0 VESA VGA
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.2.0-24-generic
root=UUID=bb81248b-bffa-45bc-b89f-17801018eb28 ro quiet splash vt.handoff=7
RelatedPackageVersions:
linux-restricted-modules-3.2.0-24-generic N/A
linux-backports-modules-3.2.0-24-generic N/A
linux-firmware 1.79
RfKill:
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 07/13/2006
dmi.bios.vendor: Phoenix Technologies, LTD
dmi.bios.version: 6.00 PG
dmi.board.name: KN9(NF-MCP55 series)
dmi.board.vendor: http://www.abit.com.tw/
dmi.board.version: 1.x
dmi.chassis.type: 3
dmi.modalias:
dmi:bvnPhoenixTechnologies,LTD:bvr6.00PG:bd07/13/2006:svn:pn:pvr:rvnhttp//www.abit.com.tw/:rnKN9(NF-MCP55series):rvr1.x:cvn:ct3:cvr:
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