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safemode safemode is offline
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Default GL perf boost in Xorg - 08-21-2009, 04:03 PM

After looking around and toying with various options (most of which are invalid), i came across this one that really works.

Option "Tiling" "FALSE"

In your xorg.conf obviously.

AccelMethod was left to default mode, and I'm using the xorg found in Debian Unstable. Composite is disabled, but only because i dont need it, not sure if it hurts GL perf.

Try it out before and after, it's like night and day.

Apparently this is caused by a tiling bug in either the intel hardware or drivers, disabling tiling allows you to function at the speed you're supposed to. I'm not sure if this has any effect on 2d performance, but others report that the composite extension benefits.

eg.
Super Tuxkart was barely responsive, very sluggish even with gmabooster working. It was playable, but not in any acceptable manner.

After the option was added, it was completely playable with no stuttering. Smooth play and responsive feel.


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reflex reflex is offline
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Default 08-21-2009, 04:34 PM

Thanks for the tip.

I'll share one of my own. If tearing during video playback is a problem, try:
Code:
Option "XvPreferOverlay" "true"


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weber72 weber72 is offline
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Default 08-21-2009, 05:34 PM

Thanks for the find(s), guys!
Is there any specific section in the xorg.conf these should go?


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safemode safemode is offline
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Default 08-21-2009, 05:47 PM

In the Device section you specify your video driver.


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weber72 weber72 is offline
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Default 08-21-2009, 06:34 PM

Thanks, safemode. I thought so but wasn't sure. Me = Linux newb. Looking forward to trying these out.


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safemode safemode is offline
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Default 08-31-2009, 12:47 AM

Ok, i got consistent glxgears framerates in the 600's. This is the fastest i've ever seen this mini 9 go.

Kernel mode setting is enabled and on by default, this is kernel 2.6.31-rc7
xorg driver version is intel 2.8.1

Xorg config is at http://signal-lost.homeip.net/files/xorg.conf

in /etc/environment i have
INTEL_BATCH=1


GMABooster is being used to set the gpu to 400Mhz prior to X starting.

Compositor is enabled and working during this test.

The other thing you need _NEED_ to look into is your acpi reported temperature when throttling your mini. If it is hitting 70C, you need to take your machine apart and make sure the thermal pads are correctly seated or replace them with higher quality ones. See this other thread i posted some pictures in to see why. replacing heat spreader


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