[Bug 84682] [i945GM] Just black screen and mouse cursor with `i915.fastboot=1`

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=84682

Daniel Vetter <daniel at ffwll.ch> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|---                         |WONTFIX

--- Comment #1 from Daniel Vetter <daniel at ffwll.ch> ---
commit 382dbe16b7b6b88ad064833d330f95828dbb4d7e
Author: Daniel Vetter <daniel.vetter at ffwll.ch>
Date:   Tue Nov 4 14:48:02 2014 +0100

    drm/i915: Mark fastboot as unsafe

    Fastboot in its current incarnation assumes that the pfit isn't
    relevatn for the state and that it can be disabled without restarting
    the crtc. Unfortunately that's not the case on gen2/3 - it upsets the
    hw and results in a black screen.

    Worse, the way the current fastboot hack is structure we can't detect
    and work around this in the code, since the fastboot smashes the
    adjusted mode into crtc->mode. Which means the higher levels can't
    correctly figure out that this is a lie and act accordingly.

    Since fastboot is just a tech demo let's mark the module option as
    experimental and close the coresponding reports as wontfix.

    Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=84682
    Signed-off-by: Daniel Vetter <daniel.vetter at intel.com>

We have a long-term plan to fix fastboot and properly integrate it and enable
it by default. That should stop gen2/3 from falling over, too.

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