[mythtv-users] X Freezes blank on 'watch tv'

Doug Larrick doug at ties.org
Sat Oct 9 00:47:08 UTC 2004

Kevin Clayton wrote:
> 2004-10-08 16:46:09 Using deinterlace method linearblend
> 2004-10-08 16:46:10 nVidiaVideoSync: VBlank ioctl did not work,
> unimplemented in this driver?
> 2004-10-08 16:46:10 DRMVideoSync: Could not open device
> /dev/dri/card0, Permission denied
> 2004-10-08 16:46:10 RTCVideoSync: Could not set RTC frequency,
> Permission denied.
> 2004-10-08 16:46:10 Using audio as timebase
> 2004-10-08 16:46:10 Video timing method: USleep with busy wait

You'll get a little bit of CPU time back if you make sure /dev/rtc is 
readable & writeable by your Myth user, and arrange to 'echo 1024 > 
/proc/sys/dev/rtc/max-user-freq' at boot time.

> 2004-10-08 16:46:10 Refresh rate: 11761, frame interval: 33366
> waiting for free video buffers timed out
> waiting for free video buffers timed out
> waiting for free video buffers timed out  <----- this message
> continues to be repeated
> I did get a myth display about /dev/dsp being busy. I sometimes get that and
> sometimes don't. I'm more concerned with the X freeze -- cpu usage issue
> at the moment.

It's trying to synchronize the video stream to the audio stream.  If it 
can't play audio, I can see that causing problems.  You're probably 
running artsd or esound and it's grabbed /dev/dsp.

I agree, though... something is screwy if your X server is freezing. 
Have you tried playing with the NvAGP option (selects whether to use 
your kernel's agp driver or nVidia's)?

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