[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

Paul Menzel <paulepanter at users.sourceforge.net> changed:

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                 CC|                            |paulepanter at users.sourcefor
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--- Comment #2 from Paul Menzel <paulepanter at users.sourceforge.net> ---
(In reply to Daniel Vetter from comment #1)
> 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

releva*nt*

>     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

structure*d*

>     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.

Sorry, what do you mean by “falling over”? Accidently use fastboot?

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