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). ** Attachment added: "output of `lspci -vvnn`" http://launchpadlibrarian.net/18562865/lspci -- [intrepid] 1.4 -> 1.5.1 bad performance regression https://bugs.launchpad.net/bugs/280671 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs