[Bug 51921] Screen black, no action possible

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https://bugzilla.kernel.org/show_bug.cgi?id=51921





--- Comment #14 from stathis <stathis at npcglib.org>  2013-01-09 01:03:49 ---
Created an attachment (id=90821)
 --> (https://bugzilla.kernel.org/attachment.cgi?id=90821)
various dmesg files

I have enabled drm.debug=0xe (see the cmdline of the kernel for details on all
parameters)

- dmesg-3.6.11 is the log from the kernel configuration in which modesettings
works (but there are still some errors with the drm)

- dmesg-3.8.0-rc2 is the log when I boot with the 3.8.0-rc2
(drm-intel-901593f2bf221659a605bdc1dcb11376ea934163) which I have to modeset=0
to get my system to boot. 

- dmesg-3.8.0-rc2-igfx_off is the log from the above exact kernel only now run
with the kernel parameters "intel_iommu=igfx_off" and modeset=1. KMS works,
however I don't really know what are the consequences. I saw this hint at:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/911236

ok. I'm out of ideas. Just let me know if there is anything to do next.

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