[Bug 107978] [amdgpu] Switching to tty fails with DisplayPort monitor going to sleep (REG_WAIT timeout / dce110_stream_encoder_dp_blank)

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Comment # 10 on bug 107978 from
I just found something. My monitor - Dell U2413 has a setting for toggling
DisplayPort 1.2. It was enabled until now. When I disable that setting, tty
starts working!

My cable is supposed to support DP 1.2 and be Vesa compliant. It's Accel
UltraAV DP 1.2 cable.

I hope this can help narrow down the problem.


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