[Bug 59431] [snb efi gmux] imac 12,1 blank screen upon booting

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=59431

--- Comment #33 from William <kc at cobradevil.org> ---
(In reply to comment #32)
> (In reply to comment #29)
> > 
> > When i start this kernel i do see some kernel output before the screen
> > flashes black, then after some seconds i see the login prompt. on the 64bit
> > kernel i also see the output from the init scripts but not on the 32bit
> > kernel. The screen is also distorted because the screen starts almost in the
> > middle and the output on the most right side is displayed at the left side
> > of the screen. I attached a picture which shows this. 
> > 
> > X can be started but has the same issue. a part of the right side of the
> > display is showed on the left side.
> 
> Which kernel exhibits the shifted display?
With the 32bit kernel i get the shifted display.
> 
> 
> (In reply to comment #31)
> > When removing the gfxpayload=keep option the 64bit kernel boots fine but the
> > 32bit kernel does not give me a console.
> 
> Does removing that option fix the shifted display?
Not really fix it. The screen turns black no console at all. With the patch
with the gfxpayload=keep option i atleast get a console but shifted.

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