Comment 25 for bug 280671

I am now using xserver-xorg-core 2:1.5.1-1ubuntu3 and having this problem.

Xorg log and output of `lspci -vvnn` are attached. My /etc/X11/xorg.conf is the default (except the EXA option when testing EXA).

Note that reading the suggestions from the thread at:
http://lists.freedesktop.org/archives/xorg/2008-October/039277.html
appears that this pacth could fix the performance problem:
http://cgit.freedesktop.org/xorg/xserver/commit/?h=server-1.5-branch&id=8ef37c194fa08d3911095299413a42a01162b078

The fix was applied to the 1.5 branch but was later reverted. It appears that the fix also require another patch:
http://lists.freedesktop.org/archives/xorg/2008-October/039285.html
commit http://cgit.freedesktop.org/xorg/xserver/commit/?id=ebea78cdba0ff14a397239ee1936bd254c181e1b
(and maybe also rebuilt drivers).