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).
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: lists.freedeskt op.org/ archives/ xorg/2008- October/ 039277. html cgit.freedeskto p.org/xorg/ xserver/ commit/ ?h=server- 1.5-branch& id=8ef37c194fa0 8d3911095299413 a42a01162b078
http://
appears that this pacth could fix the performance problem:
http://
The fix was applied to the 1.5 branch but was later reverted. It appears that the fix also require another patch: lists.freedeskt op.org/ archives/ xorg/2008- October/ 039285. html cgit.freedeskto p.org/xorg/ xserver/ commit/ ?id=ebea78cdba0 ff14a397239ee19 36bd254c181e1b
http://
commit http://
(and maybe also rebuilt drivers).