[Bug 87521] i915 netbook boots into blank screen.

[bugzilla-daemon at bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=87521

--- Comment #9 from Chris Wilson <chris at chris-wilson.co.uk> ---
It's quite simple really. We try to use GEM inside intel_modeset_init() prior
to GEM itself being initialised, which stems from:

commit 7fad798e16fecddd41c6a91728a09f0b9507e40c
Author: Daniel Vetter <daniel.vetter at ffwll.ch>
Date:   Wed Jul 4 17:51:47 2012 +0200

    drm/i915: ensure the force pipe A quirk is actually followed

    Many BIOSen forget to turn on the pipe A after resume (because they
    actually don't turn on anything), so we have to do that ourselves when
    sanitizing the hw state.

    I've discovered this due to the recent addition of a pipe WARN that
    takes the force quirk into account.

    v2: Actually try to enable the pipe with a proper configuration instead
    of simpyl switching it on with whatever random state the bios left it
    in after resume.

    v3: Fixup rebase conflict - the load_detect functions have lost their
    encoder argument.

    Reviewed-by: Jesse Barnes <jbarnes at virtuousgeek.org>
    Signed-Off-by: Daniel Vetter <daniel.vetter at ffwll.ch>


That netbook should not be using the PIPE A quirk!, but 830/845 are still prone
to this issue.

-- 
You are receiving this mail because:
You are on the CC list for the bug.
You are the assignee for the bug.