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Message #12635
[Bug 404428] Re: Mesa 7.5 low perfomance with ATI Radeon HD 2600 (RV 630)
There is no regression, r600_dri.so was never provided in any version of
mesa in ubuntu ever. You have always been using swrast if you use the
free drivers for 3D operations. Composite and 3D are not exactly the
same thing, xrender based compositing via metacity or kwin or xcompmgr
will work fine with r600 using -ati or -radeonhd (the latter requires
forcing DRI in your xorg.conf) but compiz only provides GL compositing
so it uses software rendering and will always be slow in that situation.
The bug reporter posted glxgears performance numbers saying it was low,
and glxgears is a 3D application. DRI will work for 2D acceleration, but
AIGLX for hardware accelerated GL compositing will not work. I marked it
invalid because this is a "will not fix" bug in karmic, there is no
r600_dri.so outside of mesa 7.6 and it requires a very specific libdrm
and only works on 2.6.28 kernels right now (not to mention it is about
as buggy as it can get). They are looking to integrate the kernel
specific things in 2.6.32, but unfortunately karmic will ship with
2.6.31. deadspider187, if you have low performance in 2D then you should
file a seperate bug report regarding that because it is a different
issue entirely.
The propriatary drivers do work fine with xserver 1.6, you want to
install them through the package manager via the fglrx-installer package
and not straight from ATI though. Unfortunately fglrx is not working at
the moment on the 2.6.31 kernels in karmic, so you will have to go back
to 2.6.30-10.12 if you want to use it until it is updated.
--
Mesa 7.5 low perfomance with ATI Radeon HD 2600 (RV 630)
https://bugs.launchpad.net/bugs/404428
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References