[mythtv-users] X high cpu usage

Steven Adeff adeffs.mythtv at gmail.com
Mon Dec 18 13:53:53 UTC 2006

On 12/13/06, jim.herold at comcast.net <jim.herold at comcast.net> wrote:
> I'm running Myth .20 (the official release, not SVN) compiled from source on OpenSuSE 10.1.  It's on an Asus A8N-VM CSM with an Athlon 64 X2 3800+.  I'm outputting to a Sharp LCD via DVI to HDMI cable.  Audio is ALSA via SPDIF to my surround sound receiver.  I've got both a pcHDTV-3000 and a PVR350 in it.  I'm not using XvMC, as I had it working but had tearing of the output with 1080i content.
> All seems well, except anytime I'm watching anything X shows > 98% CPU usage.  It doesn't matter whether it's SD , 720P, or 1080i.  It's the same whether it's recorded content from either tuner, or a DVD.
> So, I've tried a number of versions of the nVidia drivers.  I've tried switching the Sync method (normally I use OpenGL, but tried RTC just to see if it'd make a difference).  I tried adding noapic to the Kernel boot parameters (read somewhere that someone fixed high CPU utilization that way).  I've recompiled with and without the --enable-proc-opt option.
> I've searched the Inet, and Myth lists, but found nothing helpful.  I see other places where people mention this behavior but no solutions.  Seems everyone agrees it shouldn't happen though.
> Here's what playback logging looks like when starting livetv.  What does the "Refresh rate: 16646, frame interval: 16683" mean?  I've tried tweaking my modeline but it doesn't seem to affect what this reports as the "Refresh rate".

first, run nvidia-settings and disable the two Xv sync options, then
make sure that your modeline is using a proper frequency for your
display (which looks like it should be 60hz).

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