Created attachment 35424 [details] /var/log/messages; options drm debug=255 System environment: -- chipset: GM45 -- system architecture: x86_64 -- xf86-video-intel: xorg-x11-driver-video 7.5 -- xserver: 7.5 -- mesa: 7.8.1 -- libdrm: 2.4.20 -- kernel: suse flavour 2.6.34-rc5-6-desktop -- Linux distribution: openSUSE 11.3 MS6 Linux vaio 2.6.34-rc5-6-desktop -- Machine or mobo model: Sony Vaio VGN-Z540 -- Display connector: Reproducing steps: start X Additional info: When I started X the screen was black and neither graphic not text console was working. Attached messages revealed: May 4 16:29:07 vaio kernel: [ 4812.258631] intel drm LVDSDDC_C: SDA stuck low! May 4 16:29:07 vaio kernel: [ 4812.258708] i915 0000:00:02.0: DDC bus registration failed. May 4 16:29:07 vaio kernel: [ 4812.258711] [drm:intel_lvds_init], No LVDS modes found, disabling.
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added mhopf@suse.de to CC
added sndirsch@suse.de to CC
commit f0217c42c9ab3d772e543f635ce628b9478f70b6 Author: Eric Anholt <eric@anholt.net> Date: Tue Dec 1 11:56:30 2009 -0800 drm/i915: Fix DDC on some systems by clearing BIOS GMBUS setup. This is a sync of a fix I made in the old UMS code. If the BIOS uses the GMBUS and doesn't clear that setup, then our bit-banging I2C can fail, leading to monitors not being detected. Signed-off-by: Eric Anholt <eric@anholt.net>
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