This bug still exists in a supported release, namely 12.04.5, with the trusty backported xorg stack.
# lspci -nn -k | grep -A 2 VGA 00:01.0 VGA compatible controller [0300]: Advanced Micro Devices, Inc. [AMD/ATI] Kabini [Radeon HD 8400] [1002:9830] Subsystem: ASUSTeK Computer Inc. Device [1043:8623] Kernel driver in use: radeon I'll attach the Xorg.log as well, which shows the segfault. ** Package changed: xorg-lts-saucy (Ubuntu) => xorg-lts-trusty (Ubuntu) ** Changed in: xorg-lts-trusty (Ubuntu) Status: Won't Fix => Confirmed -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1298846 Title: AMD Radeon HD [1002:9834][1002:9830] Unable to boot to desktop without the nomodeset parameter To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg-lts-trusty/+bug/1298846/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs