I have the same problem with fresh installation of Lucid and in my case it is caused probably by the DRI. I have ATI Radeon X1950Pro AGP card and I'm using 'radeon' open source driver. When I turn off DRI in xorg.conf, everything is fine, but video playback is extremely slow, because I cant use Xv acceleration without DRI. When I turn DRI on, X server freezes on login screen. I also can't use KMS, because with KMS on I see only garbled stripes on screen. I tried several combinations in Xorg.conf and anytime I turned on DRI the Xserver freezed at startup. I tried stable xserver-xorg-video-ati package and also the latest PPA directly from GIT (currently 1:6.13.99+git20100903.2b98ec1f-0u). I spent almost two days with this annoying bug and I have functional Lucid, but I can't watch movies. This is very upleasable experience, because I finaly decided to move from Windows to Linux/Ubuntu and now I have to turn back. In attachment is my Xorg configuration and log file.
** Attachment added: "xorg.tar.gz" https://bugs.launchpad.net/ubuntu/+source/xorg-server/+bug/567696/+attachment/1570457/+files/xorg.tar.gz -- [Radeon] [Lucid] [mi] EQ overflowing. The server is probably stuck in an infinite loop https://bugs.launchpad.net/bugs/567696 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