Repeatable divide error: 0000 [#1] SMP using v4l-info (odd configuration?)

[Dave Gilbert]

Hi,
  Steps to reproduce:

sudo modprobe v4l2-mem2mem
sudo modprobe videobuf-vmalloc
sudo modprobe mem2mem_testdev

v4l-info

OK so that's an unusual set of devices - I was really looking to test v4l on a machine with no camera/tv card.

Fails on both 2.6.36-1-generic #7-Ubuntu natty and 2.6.35-22-generic #35-Ubuntu SMP maverick.

ProblemType: Bug
DistroRelease: Ubuntu 11.04
Package: linux-image-2.6.36-1-generic 2.6.36-1.7
Regression: No
Reproducible: Yes
ProcVersionSignature: Ubuntu 2.6.36-1.7-generic 2.6.36
Uname: Linux 2.6.36-1-generic x86_64
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.23.
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: dg 2068 F.... pulseaudio
 /dev/snd/pcmC0D0p: dg 2068 F...m pulseaudio
CRDA: Error: [Errno 2] No such file or directory
Card0.Amixer.info:
 Card hw:0 'Intel'/'HDA Intel at 0xdc240000 irq 41'
   Mixer name : 'Realtek ALC861'
   Components : 'HDA:10ec0861,11791205,00100300 HDA:11c13026,11790001,00100700'
   Controls : 11
   Simple ctrls : 8
Date: Sun Oct 24 15:18:35 2010
HibernationDevice: RESUME=UUID=babe3fc2-f612-4961-aa7c-de028b6b883a
Lsusb:
 Bus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
 Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
 Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
 Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
 Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
MachineType: TOSHIBA Equium A100
PccardctlIdent:
 Socket 0:
   no product info available
PccardctlStatus:
 Socket 0:
   no card
ProcCmdLine: root=UUID=031a90fc-7cc9-4daf-bb3f-4bb3f68653ac ro quiet splash crashkernel=384M-2G:64M,2G-:128M
ProcEnviron:
 SHELL=/bin/bash
 PATH=(custom, no user)
 LANG=en_GB.UTF-8
RelatedPackageVersions: linux-firmware 1.39
RfKill:
 0: phy0: Wireless LAN
  Soft blocked: no
  Hard blocked: yes
SourcePackage: linux
WpaSupplicantLog:

dmi.bios.date: 10/23/2006
dmi.bios.vendor: Phoenix Technologies LTD
dmi.bios.version: 2.10
dmi.board.name: MPAD-MSAE Customer Reference Boards
dmi.board.vendor: Intel Corporation
dmi.board.version: Not Applicable
dmi.chassis.asset.tag: No Asset Tag
dmi.chassis.type: 1
dmi.chassis.vendor: No Enclosure
dmi.chassis.version: N/A
dmi.modalias: dmi:bvnPhoenixTechnologiesLTD:bvr2.10:bd10/23/2006:svnTOSHIBA:pnEquiumA100:pvrPSAABE-00J008EN:rvnIntelCorporation:rnMPAD-MSAECustomerReferenceBoards:rvrNotApplicable:cvnNoEnclosure:ct1:cvrN/A:
dmi.product.name: Equium A100
dmi.product.version: PSAABE-00J008EN
dmi.sys.vendor: TOSHIBA

[Dave Gilbert (ubuntu-treblig)]

Patch that guards the divide - note not tested on a machine with video capture hardware

[Jeremy Foshee (jeremyfoshee)]

Hi Dave,

This bug was reported a while ago and there hasn't been any activity in it recently. We were wondering if this is still an issue? Can you try with the latest development release of Ubuntu? ISO CD images are available from http://cdimage.ubuntu.com/releases/ .

If it remains an issue, could you run the following command from a Terminal (Applications->Accessories->Terminal). It will automatically gather and attach updated debug information to this report.

apport-collect -p linux 665910

Also, if you could test the latest upstream kernel available that would be great. It will allow additional upstream developers to examine the issue. Refer to https://wiki.ubuntu.com/KernelMainlineBuilds . Once you've tested the upstream kernel, please remove the 'needs-upstream-testing' tag. 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. Please let us know your results.

Thanks in advance.

    [This is an automated message. Apologies if it has reached you inappropriately; please just reply to this message indicating so.]

[Dave Gilbert (ubuntu-treblig)]

My patch went in upstream at some point and this no longer happens.
It's commit 910f5f05f99c1ffbb484c4e6eb2a460e7a08e2d7.

Dave