[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 #25 from ye.tian <yex.tian at intel.com> ---
output info with drm-intel-next-fixes.
-------------------------------
[root at x-ivb6 ~]# dmesg  | grep ERROR
[    2.468569] [drm:intel_set_cpu_fifo_underrun_reporting [i915]] *ERROR*
uncleared fifo underrun on pipe A
[    2.468590] [drm:ironlake_irq_handler [i915]] *ERROR* CPU pipe A FIFO
underrun
[    2.470690] [drm:intel_set_pch_fifo_underrun_reporting [i915]] *ERROR*
uncleared pch fifo underrun on pch transcoder A
[    2.470709] [drm:cpt_irq_handler [i915]] *ERROR* PCH transcoder A FIFO
underrun

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