Hello I'm a friend of Ghislain Bugnicourt, and after a few tests here is what we understood :
While reading BootDmesg.txt [ 8.246609] [drm:init_ring_common] *ERROR* failed to set render ring head to zero ctl ffffffff head ffffffff tail ffffffff start ffffffff [ 8.246624] [drm:init_ring_common] *ERROR* render ring initialization failed ctl ffffffff head ffffffff tail ffffffff start ffffffff [ 8.246736] [drm:i915_driver_load] *ERROR* failed to init modeset [ 8.285242] i915 0000:00:02.0: PCI INT A disabled [ 8.285266] i915: probe of 0000:00:02.0 failed with error -5 it seems to me that : - i915 fails to load with KMS (Kernel Mode Setting), but somehow i915 is not unloaded - so for Xorg the "intel" driver does not work, it fallbacks to "vesa" If modesetting is the culprit why not deactivate it ? - the workaround to deactivate the modesetting through the start option i915.modeset=0, removes the errors in dmesg - But since recent Xorg requires modesetting, Xorg then fails to start I think is that: - the bug is either related to the BIOS or drm or i915 - at this point we should make a bug report on freedesktop ( http://intellinuxgraphics.org/how_to_report_bug.html ) FYI: similar bug on bugzilla https://bugzilla.redhat.com/show_bug.cgi?id=727455 PS: the kernel module "intelfb" does work. ** Bug watch added: Red Hat Bugzilla #727455 https://bugzilla.redhat.com/show_bug.cgi?id=727455 -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xserver-xorg-video-intel in Ubuntu. https://bugs.launchpad.net/bugs/805700 Title: Natty&Oneiric - intel 82945G/GZ graphics card - Intel driver fails To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-intel/+bug/805700/+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
