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

bugzilla-daemon at freedesktop.org bugzilla-daemon at freedesktop.org
Mon Sep 9 14:21:28 UTC 2019


Jean Delvare <jdelvare at suse.de> changed:

           What    |Removed                     |Added
                 CC|                            |jdelvare at suse.de

--- Comment #28 from Jean Delvare <jdelvare at 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!)

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