I downgraded xserver-xorg-video-ati and xserver-xorg-video-radeon manually from /var/cache/apt/archives, and X11 is still not starting (the error remains the same). The problem occurred sometime on Apr 15, and 1:6.13.0-1ubuntu2 is from the 12th. Here is the list of installed video drivers (note the versions of the two packages mentioned above):
ii xserver-xorg-video-all 1:7.5+5ubuntu1 the X.Org X server -- output driver metapack ii xserver-xorg-video-apm 1:1.2.2-1 X.Org X server -- APM display driver ii xserver-xorg-video-ark 1:0.7.2-1 X.Org X server -- ark display driver ii xserver-xorg-video-ati 1:6.13.0-1ubuntu2 X.Org X server -- AMD/ATI display driver wra ii xserver-xorg-video-chips 1:1.2.2-1 X.Org X server -- Chips display driver ii xserver-xorg-video-cirrus 1:1.3.2-1ubuntu1 X.Org X server -- Cirrus display driver ii xserver-xorg-video-dummy 1:0.3.2-1 X.Org X server -- dummy display driver ii xserver-xorg-video-fbdev 1:0.4.1-1ubuntu1 X.Org X server -- fbdev display driver ii xserver-xorg-video-glint 1:1.2.4-1 X.Org X server -- Glint display driver ii xserver-xorg-video-i128 1:1.3.3-1 X.Org X server -- i128 display driver ii xserver-xorg-video-intel 2:2.9.1-3ubuntu4 X.Org X server -- Intel i8xx, i9xx display d ii xserver-xorg-video-mach64 6.8.2-2 X.Org X server -- ATI Mach64 display driver ii xserver-xorg-video-mga 1:1.4.11.dfsg-2ubuntu1 X.Org X server -- MGA display driver ii xserver-xorg-video-neomagic 1:1.2.4-2 X.Org X server -- Neomagic display driver ii xserver-xorg-video-nouveau 1:0.0.15+git20100219+9b4118d-0ubuntu5 X.Org X server -- Nouveau display driver (ex ii xserver-xorg-video-nv 1:2.1.15-1ubuntu3 X.Org X server -- NV display driver ii xserver-xorg-video-openchrome 1:0.2.904+svn827-1 X.Org X server -- VIA display driver ii xserver-xorg-video-r128 6.8.1-2ubuntu1 X.Org X server -- ATI r128 display driver ii xserver-xorg-video-radeon 1:6.13.0-1ubuntu2 X.Org X server -- AMD/ATI Radeon display dri ii xserver-xorg-video-radeonhd 1.3.0-2 X.Org X server -- AMD/ATI r5xx, r6xx display ii xserver-xorg-video-rendition 1:4.2.3-1 X.Org X server -- Rendition display driver ii xserver-xorg-video-s3 1:0.6.3-1 X.Org X server -- legacy S3 display driver ii xserver-xorg-video-s3virge 1:1.10.4-1 X.Org X server -- S3 ViRGE display driver ii xserver-xorg-video-savage 1:2.3.1-1ubuntu1 X.Org X server -- Savage display driver ii xserver-xorg-video-siliconmotion 1:1.7.3-1 X.Org X server -- SiliconMotion display driv ii xserver-xorg-video-sis 1:0.10.2-2 X.Org X server -- SiS display driver ii xserver-xorg-video-sisusb 1:0.9.3-1 X.Org X server -- SiS USB display driver ii xserver-xorg-video-tdfx 1:1.4.3-1 X.Org X server -- tdfx display driver ii xserver-xorg-video-trident 1:1.3.3-1 X.Org X server -- Trident display driver ii xserver-xorg-video-tseng 1:1.2.3-1 X.Org X server -- Tseng display driver ii xserver-xorg-video-v4l 1:0.2.0-4 X.Org X server -- Video 4 Linux display driv ii xserver-xorg-video-vesa 1:2.3.0-1ubuntu1 X.Org X server -- VESA display driver rc xserver-xorg-video-via 1:0.2.2-5 X.Org X server -- VIA display driver ii xserver-xorg-video-vmware 1:10.16.9-1 X.Org X server -- VMware display driver ii xserver-xorg-video-voodoo 1:1.2.3-1 X.Org X server -- Voodoo display driver -- Xserver does not start due to drm problem https://bugs.launchpad.net/bugs/565643 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