I can confirm this behavior on kernel 2.6.31-10 and -11. For my machine (z11) it is the bug #430694, where a race condition between the kernel modules agpgart-intel and drm exists and randomly disables hardware acceleration from the intel chip. Then X falls back to the awfully slow software rendering (you can see this by calling glxinfo).
An update to 2.6.31-13 solved the problem, since a workaround is implemented there. Cheers, Philipp Am Sonntag, den 11.10.2009, 16:20 +0200 schrieb Wayde: > I've never had this prob when i upgraded from jaunty, but when i did a > fresh install it appears. > > -- > Wayde. > > > On Sun, Oct 11, 2009 at 3:22 PM, Mike <michael.huettem...@gmail.com> > wrote: > Hi Wayde, > > hmm. I did upgrade from Jaunty a while ago. While X did crash > 3 or 4 > times since then, there was never a situation yet where Xorg > consumed > all CPU cycles. I did mess with the X configuration alongside > the > attempts to get the Intel/Nvidia switching going. Perhaps > that makes > a difference. (Not to mention we are on Vaios instead of > Macbooks, of > course). > > Mike > > > 2009/10/11 Wayde <didi...@gmail.com>: > > Hi Mike, > > > > I don't know but i searched for this prob and found that > this is a confirmed > > karmic bug : > > https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/447231 > > > > -- > > Wayde. > > > > > > On Sun, Oct 11, 2009 at 3:01 PM, Mike > <michael.huettem...@gmail.com> wrote: > >> > >> I only have about 1% CPU for the Xorg process on intel > graphics with just > >> > >> (...) > >> Section "Device" > >> Identifier "Configured Video Device" > >> Option "AccelMethod" "uxa" > >> EndSection > >> (...) > >> > >> in xorg.conf. > >> > >> 2009/10/11 Wayde <didi...@gmail.com>: > >> > Adding this line to xorg.conf seems to fix the problem ! > >> > > >> > Section "Device" > >> > Identifier "Configured Video Device" > >> > Driver "intel" > >> > Option "AccelMethod" "uxa" > >> > EndSection > >> > > >> > Thanks. > >> > -- > >> > Wayde. > >> > > >> > > >> > On Sun, Oct 11, 2009 at 1:31 PM, Wayde > <didi...@gmail.com> wrote: > >> >> > >> >> Hello All, > >> >> > >> >> I have an xorg process which take all the time 99% of my > processor time > >> >> ! > >> >> 1441 root 20 0 99.7m 25m 9668 R 99 0.9 > 3:10.29 Xorg > >> >> > >> >> Do you have the same prob or is this normal ? > >> >> > >> >> Best regards, > >> >> -- > >> >> Wayde. > >> > > >> > > >> > _______________________________________________ > >> > Mailing list: https://launchpad.net/~sony-vaio-z-series > >> > Post to : sony-vaio-z-series@lists.launchpad.net > >> > Unsubscribe : https://launchpad.net/~sony-vaio-z-series > >> > More help : https://help.launchpad.net/ListHelp > >> > > >> > > > > > > > _______________________________________________ > Mailing list: https://launchpad.net/~sony-vaio-z-series > Post to : sony-vaio-z-series@lists.launchpad.net > Unsubscribe : https://launchpad.net/~sony-vaio-z-series > More help : https://help.launchpad.net/ListHelp > > > _______________________________________________ > Mailing list: https://launchpad.net/~sony-vaio-z-series > Post to : sony-vaio-z-series@lists.launchpad.net > Unsubscribe : https://launchpad.net/~sony-vaio-z-series > More help : https://help.launchpad.net/ListHelp _______________________________________________ Mailing list: https://launchpad.net/~sony-vaio-z-series Post to : sony-vaio-z-series@lists.launchpad.net Unsubscribe : https://launchpad.net/~sony-vaio-z-series More help : https://help.launchpad.net/ListHelp
