Ok, So I fiddled with kernel boot parameters and enable_mtrr_cleanup seems to do fix the MTRR mess like in:
$ cat /proc/cmdline BOOT_IMAGE=/boot/vmlinuz-3.16.0-24-generic root=UUID=35910738-c8fc-48e5-8b80-5c7766a720fc ro enable_mtrr_cleanup So I'll close the bug ** Changed in: xorg (Ubuntu) Status: New => Invalid -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xorg in Ubuntu. https://bugs.launchpad.net/bugs/1390961 Title: bug at initializing a radeon graphics card on pci-e To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1390961/+subscriptions _______________________________________________ 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