Hi David.
I use the latest git tree as well as 2.6.35, 2.6.32 (both ubuntu lucid) and various 26-rc candidates with the same problem on Dell E4310 laptop: screen blanks when getting to X start. System works ok, but without screen (switch to text console does not help).
If I add 'i915.nomodeset xforcevese nomodeset' screen still blanks but kernel panics. Unfortunately I can not connect it to any other computer to get netconsole dump.
If I add 'i915.nomodeset xforcevese nomodeset single' kernel command line then X can be started 'manually' in a failsafe mode (there is a ncurses screen in ubuntu for that).
I read a lot of internets about this problem but neither solution helps in my case. I added a small debug to intel_dp_link_required(), which prints some params, namely whether device is edp/pch, pixel clocks and returned value for the case when both edp and pch are set, which is not the case for my hardware: pch is not set.
I attach dmesg and X log for successful failsafe start, hope it will help.
Thank you.
On Sat, 11 Sep 2010 22:46:46 +0400, Evgeniy Polyakov zbr@ioremap.net wrote:
I use the latest git tree as well as 2.6.35, 2.6.32 (both ubuntu lucid) and various 26-rc candidates with the same problem on Dell E4310 laptop: screen blanks when getting to X start. System works ok, but without screen (switch to text console does not help).
An eDP panel, yes we are indeed continuing to debug the link configuration on those machines.
The current set of patches we have for eDP are available at
git://git.kernel.org/pub/scm/linux/kernel/git/ickle/drm-intel.git
in the drm-intel-next branch. Jesse insists that he has a working eDP machine on his desk, so maybe there is hope yet. -Chris
Hi Chris.
On Sat, Sep 11, 2010 at 08:45:34PM +0100, Chris Wilson (chris@chris-wilson.co.uk) wrote:
An eDP panel, yes we are indeed continuing to debug the link configuration on those machines.
The current set of patches we have for eDP are available at
git://git.kernel.org/pub/scm/linux/kernel/git/ickle/drm-intel.git
in the drm-intel-next branch. Jesse insists that he has a working eDP machine on his desk, so maybe there is hope yet.
Nope, hope quickly dissapears in the dark - I installed this version and get blank screen after boot. nomodeset + vesa and failsafe X session work.
dmesg and X log during failed session attached.
On Sun, Sep 12, 2010 at 02:13:41AM +0400, Evgeniy Polyakov (zbr@ioremap.net) wrote:
git://git.kernel.org/pub/scm/linux/kernel/git/ickle/drm-intel.git
in the drm-intel-next branch. Jesse insists that he has a working eDP machine on his desk, so maybe there is hope yet.
Nope, hope quickly dissapears in the dark - I installed this version and get blank screen after boot. nomodeset + vesa and failsafe X session work.
It happend that previous ran was with 'drm-intel-fixes' branch. After I pulled 'drm-intel-next' to that tree behaviour changed, but still screen is blank. It blinked from previous black to dark black :) maybe it turned off and on, do not know, but there was no such blink previously. Also it blinks the same way when turning into fb console. But still no screens and kernel crashes with i915.modeset=0
dmesg and X log attached. Hope it helps.
dri-devel@lists.freedesktop.org
-
Chris Wilson -
Evgeniy Polyakov