[gentoo-kernel] gspca_zc3xx module

[gentoo-kernel] gspca_zc3xx module

[Hasan SAHIN]

Hi All,

I was using the gspca_zc3xx module with kernel 2.6.32-r7 without any 
problem but webcam does not work since I upgrade to 2.6.34-r1(x 86 stable)
My webcam is : A4 tech PK-635M and I am using wxcam (my own ebuild)
Also I have tried with kopete and cheese but result is same.

I have tried with ubuntu 10.04 (kernel 2.6.32.xxx) and it is working as 
good. I guess there is a bug in the 2.6.34.xx series?

When I run the wxcam with command line I am getting some errors and 
blank screen(same with kopete and cheese) :

Determining video4linux API version...
Using video4linux 2 API
VIDIOC_ENUM_FRAMESIZES: Invalid argument
V4L2_CID_SATURATION is not supported
Determining pixel format...
pixel format: JPEG
Found V4L2_PIX_FMT_JPEG pixel format
VIDIOC_DQBUF: Input/output error


#emerge --info

Portage 2.1.8.3 (default/linux/x86/10.0/desktop, gcc-4.4.3, 
glibc-2.11.2-r0, 2.6.34-gentoo-r1 i686)
=================================================================
System uname: 
Linux-2.6.34-gentoo-r1-i686-AMD_Athlon-tm-_64_X2_Dual_Core_Processor_3800+-with-gentoo-1.12.13
Timestamp of tree: Fri, 23 Jul 2010 11:45:03 +0000
app-shells/bash:     4.0_p37
dev-java/java-config: 2.1.11
dev-lang/python:     2.6.5-r2, 3.1.2-r3
dev-util/cmake:      2.6.4-r3
sys-apps/baselayout: 1.12.13
sys-apps/sandbox:    1.6-r2
sys-devel/autoconf:  2.13, 2.65
sys-devel/automake:  1.9.6-r3, 1.10.3, 1.11.1
sys-devel/binutils:  2.20.1-r1
sys-devel/gcc:       4.4.3-r2
sys-devel/gcc-config: 1.4.1
sys-devel/libtool:   2.2.6b
virtual/os-headers:  2.6.30-r1
ACCEPT_KEYWORDS="x86"
ACCEPT_LICENSE="*"
CBUILD="i686-pc-linux-gnu"
CFLAGS="-O2 -march=native -pipe -fomit-frame-pointer"
CHOST="i686-pc-linux-gnu"
CONFIG_PROTECT="/etc /usr/share/X11/xkb"
CONFIG_PROTECT_MASK="/etc/ca-certificates.conf /etc/env.d 
/etc/env.d/java/ /etc/fonts/fonts.conf /etc/gconf /etc/revdep-rebuild 
/etc/sandbox.d /etc/terminfo"
CXXFLAGS="-O2 -march=native -pipe -fomit-frame-pointer"
DISTDIR="/usr/portage/distfiles"
FEATURES="assume-digests distlocks fixpackages news parallel-fetch 
protect-owned sandbox sfperms strict unmerge-logs unmerge-orphans userfetch"
GENTOO_MIRRORS="rsync://gentoo.mirrors.tds.net/gentoo 
http://gentoo.mirrors.tds.net/gentoo"
LANG="tr_TR.UTF-8"
LDFLAGS="-Wl,-O1"
LINGUAS="tr"
MAKEOPTS="-j3"
PKGDIR="/usr/portage/packages"
PORTAGE_CONFIGROOT="/"
PORTAGE_RSYNC_OPTS="--recursive --links --safe-links --perms --times 
--compress --force --whole-file --delete --stats --timeout=180 
--exclude=/distfiles --exclude=/local --exclude=/packages"
PORTAGE_TMPDIR="/var/tmp"
PORTDIR="/usr/portage"
PORTDIR_OVERLAY="/var/lib/layman/roslin /var/lib/layman/gentoo-china 
/var/lib/layman/steev /var/lib/layman/sunrise /var/lib/layman/jasiu 
/usr/local/portage"
SYNC="rsync://rsync.europe.gentoo.org/gentoo-portage"

Re: [gentoo-kernel] gspca_zc3xx module

[Peter Volkov]

Hi Hasan.

В Сбт, 24/07/2010 в 00:15 +0000, Hasan SAHIN пишет:
> I was using the gspca_zc3xx module with kernel 2.6.32-r7 without any 
> problem but webcam does not work since I upgrade to 2.6.34-r1(x 86 stable)
> My webcam is : A4 tech PK-635M and I am using wxcam (my own ebuild)
> Also I have tried with kopete and cheese but result is same.
> 
> I have tried with ubuntu 10.04 (kernel 2.6.32.xxx) and it is working as 
> good. I guess there is a bug in the 2.6.34.xx series?

Have you tried 2.6.32 kernel in Gentoo? In case yes, and if webcam works
in 2.6.32 and fails in 2.6.34, the best way to resolve this issue is to
find commit that broke it. Please, download sources with git and check
that webcam really works with 2.6.32 and fails with 2.6.34. After that
go through bisect (`git help bisect` or google has a good explanation on
how to do that) to find excact commit that broke webcam. Try to apply
that commit and revert it to check that webcam really works before and
fails after. After that just mail to authors of commit and subsystem
maintainers (you can find them in /usr/src/linux/MAINTAINERS file. After
fix found, please, open bug report so we could apply fix in Gentoo as
soon as possible.

-- 
Peter.