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Double buffering slow on 13.37

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bolta...@boltar.world

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May 25, 2011, 12:30:01 PM5/25/11
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Hello

I've written a number of games that use the X windows DOUBLE-BUFFER
extension and they've all run fine on every version of slackware up until
13.37. Now unless their window is small they all run likes dogs on both the
32 and 64 bit versions of slackware even with compiz switched off. Its like
going back to using an old matrox card on a P3.

Does anyone have any idea what extension or some other aspect of the version
of X.org shipped with 13.37 that may be causing this issue or has the double
buffer extension been deprecated without telling anyone?

B2003

Peter Matthías

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May 25, 2011, 3:56:48 PM5/25/11
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bolta...@boltar.world skribis:

> Does anyone have any idea what extension or some other aspect of the
> version of X.org shipped with 13.37 that may be causing this issue or has
> the double buffer extension been deprecated without telling anyone?

Have you checked /proc/mtrr?

Peter

King Beowulf

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May 28, 2011, 1:41:49 PM5/28/11
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Just an off the top thought after 2 cups of coffee. The double buffer
extension will still depend on what X loads as the video driver module.
For whichever card you are using, there may have been a regression. For
example, if before you used nv and now X loads nouveau....

Have you checked other video chipsets or tried on a simple VESA
framebuffer driver?

I tend to stick with the Nvidia Binary blob on my boxes. Faster that a
scalded cat on a hot tin roof. But even so, configuration of X is
critical to proper performance.


--
Linux Counter #230211

bolta...@boltar.world

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May 28, 2011, 2:25:32 PM5/28/11
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On Sat, 28 May 2011 17:41:49 +0000 (UTC)
King Beowulf <kingb...@nomail.com> wrote:
>Just an off the top thought after 2 cups of coffee. The double buffer
>extension will still depend on what X loads as the video driver module.
>For whichever card you are using, there may have been a regression. For
>example, if before you used nv and now X loads nouveau....

It seems to be running the intel i810 driver which I'd have thought would be
pretty standard.

>Have you checked other video chipsets or tried on a simple VESA
>framebuffer driver?

Yes, it works ok with VESA if I boot with nomodeset but the screen res
is pretty limited. The intel driver doesn't want to work in with no
framebuffer.

B2003


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