xorg: not setting MTRR range register [Was: Re: Recent poor DVD playback performance]

Philip Walden wrote:

Craig White wrote:

On Sun, 2006-11-26 at 21:07 -0800, Philip Walden wrote:


Craig White wrote:



On Sun, 2006-11-26 at 16:54 -0800, Philip Walden wrote:




I have FC5 and recently my DVD playback has tanked.

Both xine and mplayer (from livna and greysector repos respectively) act like they cannot read the dvd fast enough. Xine plays for about 10 seconds and then freezes for a a second or two, plays some more and then freezes again. Meanwhile the disk led is dark with minimal activity. The same thing happens with a mounted DVD in the DVD-ROM drive. So it is not my disk. Mplayer complains that "Your system is too SLOW to play this!"

It is a 800Mhz athlon with 256MB memory and a nvidia tnt2 AGP using the nv driver. Although it is older machine, this system was great at playing DVDs up until a couple of weeks ago. So I suspect a yum update might have done something. Before this, I have been playing DVDs on it happily for a couple of years from RH9, to FC4 and now FC5.

Anyone have some ideas for me to try oir areas to explore?

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Check November 19th (1 week ago)

Thread - DVD playback slow & choppy



Thanks for the tip. But I had already tried both avenues suggested: making sure to use xvideo and disk dma.

It must be something else.

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what does top tell you? Where is your cpu power getting sucked away?
beagled?


I have also been looking into MTRR settings. I was told that current X servers would set these automatically, but looking at mine, it does not seem to be working:
reg00: base=0x00100000 ( 1MB), size= 256MB: write-back, count=1

From Xorg.0.log I get:
PCI:*(1:5:0) nVidia Corporation NV5 [RIVA TNT2/TNT2 Pro] rev 21, Mem @ 0xf5000000/24, 0xfc000000/25

So the MTRR does not look right.

I ran across this in the debian buglist: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=362755

"xorg: not setting MTRR range register...Starting with Xorg 7.0, X server is not setting MTRR range register
for framebuffer to write-combining which means that display output is twice slower than before (or using twice as much CPU, depending on the view)...These bugs should be fixed in the X server and drivers from X.Org 7.1"

Could this be happening in FC5 too?

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