[mythtv-users] fps drops with DRM sync and bob
doug at parkercat.org
Sat Jun 9 14:30:30 UTC 2007
Hamish Moffatt wrote:
> I've just noticed that when using bob and the problem is occuring, the X
> server process is using 100% of CPU. mythfrontend is using ~15% (on the
> other core). I suspect this is highly relevant!
> When using kerneldeint, or disabling bob by forcing video scan to
> progressive, mythfrontend uses about the same and the X server does
> not appear in "top" at all.
I think you may be on to something there :-)
If you were to install & use oprofile (including the relevant kernel
module) I think it would show the culprit.
Relevant versions on my system:
> Do you have anything special in your xorg.conf? Or in your kernel
> configuration? dmesg for me reports:
> agpgart: Detected an Intel 945GM Chipset.
> agpgart: Detected 7932K stolen memory.
> agpgart: AGP aperture is 256M @ 0xd0000000
Note that my chipset is 965G (this is a desktop system):
Linux agpgart interface v0.101 (c) Dave Jones
agpgart: Detected an Intel 965G Chipset.
agpgart: Unknown page table size, assuming 512KB
agpgart: Detected 7676K stolen memory.
agpgart: AGP aperture is 256M @ 0x80000000
The 965G does not have video overlay hardware and instead uses OpenGL
textured video; if you can find a driver option for this on your
hardware it may be worth trying.
> I've included my xorg.conf below.
I have sent my xorg.conf and /proc/config.gz by private email. I didn't
see anything obviously wrong in your xorg.conf.
Like I said above, I suspect oprofile is your best bet.
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