Bug 6596

Summary:	Dark images from my webcam using gspca_zc3xx module
Product:	Mageia	Reporter:	Gegetel <geo.cherchetout>
Component:	RPM Packages	Assignee:	Thomas Backlund <tmb>
Status:	RESOLVED OLD	QA Contact:
Severity:	normal
Priority:	Normal	CC:	epistemepromeneur, geo.cherchetout, marja11
Version:	Cauldron
Target Milestone:	---
Hardware:	i586
OS:	Linux
Whiteboard:
Source RPM:	kernel	CVE:
Status comment:

Description Gegetel 2012-06-27 09:21:00 CEST

Description of problem:

I have a ZC305 webcam from Z-Star Microelectronics Corp. recognized as 0ac8:305b. This webcam never provided very bright pictures in any application on Mandriva 2010.2 and Mageia 1, but it was usable.
Since upgrade to Mageia 2, the pictures from webcam are dark in cheese and vlc, very dark in Linphone. Another webcam of same model doesn't work better.
To-day, I installed Cauldron's kernel-3.4.4.1 on Mageia 2 without improvement.

(I discovered that when gspca_zc3xx module is launched with option "force_sensor=0", the pictures are much more, but not enough, luminous.)

Comment 1 Gegetel 2012-06-27 18:45:09 CEST

This webcam works much better on Fedora 16 and perfectly on Debian Wheezy, both with vlc and Linphone, softwares and kernels versions provided by these distributions.

Comment 2 Gegetel 2012-06-28 11:07:20 CEST

Two complementary experiments: On one computer are installed Mageia 2 and Debian wheezy. Same Linphone 3.5.2 on the two OSes.

1) From Mageia I run Debian's Linphone :
$ LD_LIBRARY_PATH=/mnt/debrac/usr/lib /mnt/debrac/usr/bin/linphone
=> Very dark image from my webcam

2) From Debian I run Mageia's Linphone :
$ LD_LIBRARY_PATH=/mnt/magrac/usr/lib /mnt/magrac/usr/bin/linphone
=> Wonderful image from my webcam

Comment 3 Gegetel 2012-08-04 15:01:06 CEST

One complementary experiment: I did compile and install on Mageia 2 gspca modules from Debian Wheezy sources, without applying any more patch, and now my webcam provides beautiful images in Linphone, in VLC, in cheese. (When starting applications, the first images are dark, but they become lighter after a few steps.)
Lastly, I tried on Mageia 2 kernel 3.5 from cauldron. The issue is still present.

Gegetel 2012-08-04 17:39:38 CEST

CC: (none) => gerard.quequet

Comment 4 Manuel Hiebel 2012-11-17 14:47:28 CET

*** Bug 8058 has been marked as a duplicate of this bug. ***

CC: (none) => epistemepromeneur

Manuel Hiebel 2012-11-17 14:48:42 CET

Assignee: bugsquad => tmb
Source RPM: kernel-3.4.4-1.mga3.src.rpm => kernel

Comment 5 episteme promeneur 2012-11-17 16:13:01 CET

(In reply to comment #3)
> One complementary experiment: I did compile and install on Mageia 2 gspca
> modules from Debian Wheezy sources

i have same pb with my mandriva

where can i found source of the gspca modules according to compile and install them ?

thanks

Comment 6 episteme promeneur 2012-11-17 16:13:43 CET

i have same pb with gspca_stv06xx

Comment 7 Gegetel 2012-11-17 16:40:23 CET

> where can i found source of the gspca modules according to compile and install
> them ?
> 
> thanks

The only way I found was to install linux-source .deb package on my Debian 
Wheezy.

Comment 8 episteme promeneur 2012-11-17 18:14:45 CET

wh(In reply to comment #7)
> > where can i found source of the gspca modules according to compile and install
> > them ?
> > 
> > thanks
> 
> The only way I found was to install linux-source .deb package on my Debian 
> Wheezy.

what is the url of the packet of the source of gspca modules ?

thanks

Comment 9 episteme promeneur 2012-11-18 15:01:51 CET

i found the solution

see here comment 16 https://bugzilla.kernel.org/show_bug.cgi?id=49591

Comment 10 Gegetel 2012-12-04 15:00:16 CET

(In reply to comment #9)
> i found the solution
> 
> see here comment 16 https://bugzilla.kernel.org/show_bug.cgi?id=49591

I am very happy for you but this solution is not the solution for "my" bug I described. I downloaded and compiled easily JF.moine's gspca-2.15.19 on Mageia 2 (linux-3.3.8) and loaded the new gspca_main and gspca_zc3xx modules without any improvement.
Images from my webcam are too dark but they are displayed, my bug is not the same than your's.

(And it is not the same than 8058.)

Comment 11 Marja Van Waes 2015-04-18 20:51:49 CEST

Sorry, but this bug saw no action since over 2 yrs ago. 
No cauldron package has stayed the same since then.

Closing as OLD

Please reopen if this report is still valid for _current_ cauldron and/or fully
updated Mageia 4

Status: NEW => RESOLVED
CC: (none) => marja11
Resolution: (none) => OLD