[Bug 90468] [IVB Bisected] Both DVI/DP monitors are black after X rotation + S3

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=90468

--- Comment #22 from ye.tian <yex.tian at intel.com> ---
(In reply to Ander Conselvan de Oliveira from comment #20)
> Could you test the following branch:
> 
> https://github.com/anderco/linux/tree/fdo/90468
> 
> It has three patches on top of drm-intel-next-fixes that should fix this
> issue.

Test it on fdo/90468 branch, this problem does not exists.

BTW, Boot up causes dmesg WARNING.

output:
-------------------------

[    2.477493] [drm:intel_set_pch_fifo_underrun_reporting [i915]] *ERROR*
uncleared pch fifo underrun on pch transcoder A
[    2.477515] [drm:cpt_irq_handler [i915]] *ERROR* PCH transcoder A FIFO
underrun
[    2.477921] [drm:cpt_set_fdi_bc_bifurcation] enabling fdi C rx

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