Can you please replace your /lib/modules/2.6.38-8-generic/kernel/drivers/gpu/drm/radeon/radeon.ko with the attached one (take a backup of the original). The difference is that it will print out a message when the GART is initialized. Please attach the dmesg output after booting with it.
** Attachment added: "radeon.ko for 2.6.38-8" https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-ati/+bug/755715/+attachment/2037788/+files/radeon.ko -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xserver-xorg-video-ati in Ubuntu. https://bugs.launchpad.net/bugs/755715 Title: [RV670] radeon 3870 X2 gives black screen if using extended desktop _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp
