[Bug 109246] HDMI connected monitors fail to sleep and instead turn back on when amdgpu.dc=1

https://bugs.freedesktop.org/show_bug.cgi?id=109246

Jean Delvare jdelvare@suse.de changed:

What |Removed |Added ---------------------------------------------------------------------------- CC| |jdelvare@suse.de

--- Comment #28 from Jean Delvare jdelvare@suse.de --- Same problem here. Radeon RX 550 with 2 identical Lenovo P27h-10 displays configured in side-by-side mode, one over DisplayPort and one over HDMI, kernel 5.2.11. When the displays go to sleep, the multi-display configuration is lost, displays are in mirror mode when waking up, and I must configure them again. Booting with amdgpu.dc=0 works around the problem (thanks Michel for the hint!)