[DC] amd-staging-4.7: problems with unblanking displays when monitors are switched off
Submitted by Darren Salt
Assigned to Default DRI bug account
Description
Created attachment 127405
Kernel log extract, showing the unblanking failure.
Setup: RX 470 with two monitors attached – one via DVI-and one via HDMI. (Both are AOC monitors.)
- Ensure that outputs are blanked (via xset, time-out or similar).
- Switch off the monitors.
- Unblank the outputs.
- Switch on the monitors.
Invariably, in this situation, the DVI-connected monitor is unblanked and displaying what it should be, but the HDMI-connected monitor is receiving no signal (or at least nothing to display) and is therefore displaying nothing.
The HDMI-connected monitor can be restored by using xrandr to change mode or by blanking and unblanking – so long as it's switched on while doing so.
~~**Attachment 127405**~~, "Kernel log extract, showing the unblanking failure.":
log-extract.txt