I was thinking of reinstalling Ubuntu 9.10 and was wondering if the no-backfill X-server patch was still needed for "a lag free experience with Compiz" if I use Catalyst 10.1 together with my HD4870?
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No-backfill still needed?
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Originally posted by d2kx View PostNot the backfill, but the newer backclear patch is needed.
I hear this problem is going to get fixed in a future Catalyst driver release
A new 2D acceleration mechanism has gone into the 10.2 and 10.3 betas and is in testing. Supposedly it improves performance under composite window managers, but I haven't been able to test it due to unrelated issues in the drivers. They seem to be targeting Compiz, but I expect kwin will also see improvements. Hopefully everything pans out in the end.
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It is still needed unless you enable this new 2D acceleration method. It's called 'Direct2D'
1. Kill the x server
2. Open /etc/ati/amdpcsdb, and under the section [AMDPCSROOT/SYSTEM/DDX]
add:
Direct2DAccel=STRUE
3. Reboot (just in case)
It's still on testing, but its getting pretty stable, at least for me.
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