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From: matthieu castet <castet.matthieu@free.fr>
To: video4linux-list@redhat.com
Subject: v4l1 doesn't work anymore with bttv on 2.6.26
Date: Sat, 03 Jan 2009 21:28:16 +0100	[thread overview]
Message-ID: <495FCA60.5060008@free.fr> (raw)

Hi,

This is a copy of the bugreport i did on debian bugtracker : 
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=510621


I got a v4l1 application that worked for years.
With the current kernel, it hangs in a state where VIDIOCMCAPTURE always
return -EBUSY.

After some debug, it seems that VIDIOCMCAPTURE fails the first time
because of videobuf_queue_is_busy 'vbuf: busy: buffer #0 mapped'.

Then after that error it does a VIDIOCSYNC on all buffer.
Then every call of VIDIOCMCAPTURE failed because of check_btres
returning -EBUSY.

I don't know what cause the first videobuf_queue_is_busy error.
But for all the other errors I suppose one of the problem is that
VIDIOCSYNC does a STREAMON but never does a STREAMOFF...


Regards,

Matthieu

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             reply	other threads:[~2009-01-03 20:28 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2009-01-03 20:28 matthieu castet [this message]
2009-01-04 20:32 ` v4l1 doesn't work anymore with bttv on 2.6.26 Trent Piepho

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