[Bug 58111] [fbdev regression] surplus fbdev area on mutli-head systems not cleared.

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=58111

Daniel Vetter <daniel at ffwll.ch> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |ASSIGNED
           Assignee|intel-gfx-bugs at lists.freede |chris at chris-wilson.co.uk
                   |sktop.org                   |
            Summary|[SNB regression]Mimi-HDMI   |[fbdev regression] surplus
                   |screen mess                 |fbdev area on mutli-head
                   |                            |systems not cleared.

--- Comment #2 from Daniel Vetter <daniel at ffwll.ch> ---
Looks like the missing clear for stolen memory allocated framebuffers.
Reverting

commit 0ffb0ff283cca16f72caf29c44496d83b0c291fb
Author: Chris Wilson <chris at chris-wilson.co.uk>
Date:   Thu Nov 15 11:32:27 2012 +0000

    drm/i915: Allocate fbcon from stolen memory

should work around the issue. Note that this happens everywhere you have more
than 1 display connected when booting, and the native resolutions are
different. The surplus area on the higher-res screen which is not used by the
kernel fbdev console is not properly cleared and contains garbage (noise
usually for fresh boots, old screen contents sometimes when rebooting).

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