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-- You received this bug notification because you are a member of Desktop Packages, which is subscribed to xserver-xorg-video-ati in Ubuntu. https://bugs.launchpad.net/bugs/361060 Title: [X1400] Extra X sessions very slow because of EXA and no DRI Status in xserver-xorg-video-ati package in Ubuntu: Fix Released Status in xserver-xorg-video-ati source package in Karmic: Won't Fix Bug description: In Jaunty, EXA is enabled by default in the radeon driver. This works fine for the main login session (DISPLAY :0), provided that DRI is successfully initialized. However, DRI seems to only be available to the first X display instance, as the radeon driver fails to initialize DRI for extra sessions, like an additional "Guest session". This in combination with EXA being the default acceleration method makes for a very poor experience with extremely slow rendering for such sessions. I think EXA requires DRI to be able to perform OK (it certainly sucks without it on my machine). By using XAA acceleration for extra sessions that do not have DRI, the performance becomes acceptable. I don't know if Intel or Nvidia handle multiple X sessions and 3D acceleration/DRI, but it does not seem like the radeon driver does. I solved this by making sure any extra sessions use XAA instead of EXA. This is a quick hack I did, so extra sessions use XAA: 1) Added the following to /etc/gdm/gdm.conf-custom: ... [servers] [server-Standard] name=Standard server command=/etc/gdm/Xwrapper -br -audit 0 flexible=true 2) Xwrapper is a simple script which checks if DISLPLAY is ':0' or not. If display is not ':0', then X is started with a configuration file that sets the radeon driver to use XAA acceleration: #!/bin/sh if [ "$1" != :0 ]; then exec /usr/X11R6/bin/X "$@" -config /etc/X11/xorg-extra.conf fi exec /usr/X11R6/bin/X "$@" 3) /etc/X11/xorg-extra.conf is simply an Xorg config file that sets radeon driver to use XAA. The problem is that extra sessions in combination with the radeon driver become unusably slow because of the lack of DRI, so it should be solved in some way. Maybe the radeon-driver should select XAA instead of EXA when DRI fails to initialize ? Or is it perhaps possible to get EXA to perform OK without DRI ? I guess this won't be a problem when all the new DRI2/GEM/KMS stuff comes into place, but it certainly is a problem for current Ubuntu Jaunty. I have an ATI X1400 graphics card, and using of course radeon driver. Tracking Jaunty beta. I set the package hint in this bug to xserver- xorg-video-radeon, but I'm not sure that's appropriate. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-ati/+bug/361060/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
