[linux-dvb] videobuf changes broke analog capture with saa7134/-46 (DQBUF -EIO), WAS: budget_av 'plus' cards saa7113 capture broken by CI code or incomplete

thomas schorpp thomas.schorpp at googlemail.com
Mon Dec 24 11:20:09 CET 2007

thomas schorpp wrote:
> thomas schorpp wrote:
>> thomas schorpp wrote:
>>> http://linuxtv.org/hg/v4l-dvb/rev/698119141230 and other CI-stuff 
>>> seems to break saa7113 capture with xawtv (says driver refuses to 
>>> capture) on at least KNC1 dvb-c plus, can anyone confirm this?
> cannot find the fault in budget_av.c.
> guys, it is confirmed, that Your videobuf refactoring broke the saa7134 
> analog capture between release kernels 2.6.22..23 time:
> #linux-dvb IRC log:
> Dec 02 23:24:53 <Md>    after (I think) upgrading the X server (to 7.3), 
> anything which tries to access my saa7134 analog card (I tried xawtv, 
> tvtime and even mplayer) fails with VIDIOC_DQBUF. any clues?
> Dec 03 00:09:31 <Md>    buggy kernel, not X. upgrading to 2.6.23 fixed it
> by one of those commits:
> http://git.kernel.org/?p=linux/kernel/git/mchehab/v4l-dvb.git;a=history;f=drivers/media/video/saa7134/saa7134-video.c;h=6396d9b5c0636ced4538fc47460078b54ec0c6d3;hb=HEAD 
> and fixed for 2.6.23 by later commit.
> for the saa7164_video.c analog capture is still incomplete or broken in 
> linux-dvb mercurial and releases kernels by one of those commits:
> http://git.kernel.org/?p=linux/kernel/git/mchehab/v4l-dvb.git;a=history;f=drivers/media/common/saa7146_video.c;h=ae36d101006b6d0600898b76af319b95d90c1c31;hb=HEAD 
> could the authors pls give a hint which commit for the saa7134 could 
> have fixed it for saa7134 analog cards?
> I'll correct the saa7146_video.c code, then, otherwise it will take more 
> weeks or 4E4 to find the bug.
> thx
> y
> tom

driver debug log attached from mencoder try, many nopage errors, maybe helps.

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