[Bug 108462] two external screens permanently go blank on HP EliteBook Folio G1

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=108462

--- Comment #83 from Lakshmi <lakshminarayana.vudum at intel.com> ---
(In reply to Johannes Berg from comment #82)
> Created attachment 145261 [details]
> requested dmesg from new drm-tip commit
> 244c5c8116c0042d61455697a9d85e899e2d9267 (with drm.debug=0x1e)

Thanks for gathering the logs from drmtip. There are some underruns here

7.734338] [drm:gen8_de_irq_handler [i915]] hotplug event received, stat
0x00200000, dig 0x10101011, pins 0x00000020, long 0x00000000
[    7.734378] [drm:intel_hpd_irq_handler [i915]] digital hpd port B - short
[    7.734437] [drm:intel_dp_hpd_pulse [i915]] got hpd irq on port B - short
[    7.736611] [drm:intel_dp_hpd_pulse [i915]] got esi 01 10 00
[    7.744269] [drm:intel_dp_hpd_pulse [i915]] got esi2 01 00 00
[    7.744307] [drm:intel_dp_hpd_pulse [i915]] got esi 01 00 00
[    7.750579] [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU
pipe A FIFO underrun
[    7.750676] [drm:intel_fbc_underrun_work_fn [i915]] Disabling FBC due to
FIFO underrun.

@Ville, help here?

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