[Nouveau] [Bug 56615] [NVD9] Unable to start X on ThinkPad T420s laptop

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=56615

--- Comment #18 from Mark Cave-Ayland <mark.cave-ayland at ilande.co.uk> ---
Hi Ilia,

I've just done a build and test against 3.11-rc3+ from nouveau/linux-2.6 git
master which shows as the following commit:

commit 68ea5eed7ca275434468edff36b3b49e5f129213
Author: Ben Skeggs <bskeggs at redhat.com>
Date:   Tue Jul 30 11:47:47 2013 +1000

    drm/nouveau/vm: make vm refcount into a kref

The result in terms of the hang are the same as before. Unfortunately I haven't
had a chance to do the network test yet whilst in the hung state since my
desktop switch is currently broken. If after reviewing the logs you still want
me to try this, let me know and I'll try to work something out.

The nouveau module was given the parameter debug=PGRAPH=debug and I did two
attempts: the first file 3.11-rc3-dmesg.plugged is a boot with the DP connector
plugged in (bad, hangs) whilst the second file 3.11-rc3-dmesg.unplug is a boot
without the DP connector plugged in (good, but standalone mode only).

I see there are some mentions of switcheroo in the logs which is interesting
given that I'm currently running it in Discrete Graphics (nVidia mode) without
Optimus enabled in the BIOS.


Many thanks,

Mark.

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