Ubuntu
libv4l package

Webcam did not work on natty du to the non initialisation of LD_PRELOAD

Bug #784887 reported by Abdelmonam Kouka
10
This bug affects 2 people
Affects Status Importance Assigned to Milestone
libv4l (Ubuntu)
Confirmed
Undecided
Unassigned

Bug Description

Hi,

My webcam is not working on natty (even before it wasn't working), I verify if it is detected or not and I find that it is detected well and it is supported by ubuntu, hereafter my diagnostic:
http://sabi.ly/p/t2P7W
http://sabi.ly/p/Nf84G
http://sabi.ly/p/Wf5i7
http://sabi.ly/p/Ks9f4
http://sabi.ly/p/b2Y5X
http://sabi.ly/p/Fp6b5 and the output of this last command was a green screen!

Revision history for this message
Abdelmonam Kouka (abdelmonam-kouka) wrote :

Finally the solution I find is to use the following prefix (after verifying that the package/library v4l1 exists) when launching the program that we want use our webcam "LD_PRELOAD=/usr/lib32/libv4l/v4l1compat.so", example with skype:
LD_PRELOAD=/usr/lib32/libv4l/v4l1compat.so skype
I tested it and it is working well, with skype, mplayer and guvcview.

And to use normally my programs I add this line "LD_PRELOAD=/usr/lib32/libv4l/v4l1compat.so" at the end of this file: /etc/environment and now I use my programs without this prefix and they my webcam is working well :)

Changed in libv4l (Ubuntu):
assignee: nobody → Abdelmonam Kouka (abdelmonam-kouka)
status: New → Confirmed
status: Confirmed → Fix Committed
Mohamed IKBEL Boulabiar (boulabiar)
Changed in libv4l (Ubuntu):
status: Fix Committed → New
Abdelmonam Kouka (abdelmonam-kouka)
Changed in libv4l (Ubuntu):
assignee: Abdelmonam Kouka (abdelmonam-kouka) → nobody
Revision history for this message
Joseph Chereshnovsky (joseph.chereshnovsky) wrote :

Hi, I have the same issue on my Ubuntu 11.04 on ASUS U31F laptop
The problem is that my Ubuntu is 32bit and I don't have a /usr/lib32 directory

Launchpad Janitor (janitor)
Changed in libv4l (Ubuntu):
status: New → Confirmed
Revision history for this message
Joseph Chereshnovsky (joseph.chereshnovsky) wrote :

OK, I've fired the new report because I have a slightly different situation and think that both bugs can be not related
See details here: https://bugs.launchpad.net/ubuntu/+source/v4l-utils/+bug/826265

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