https://bugzilla.kernel.org/show_bug.cgi?id=210429
Bug ID: 210429 Summary: AMDGPU - DRM connector force-probe after DPMS causes monitor to reconnect Product: Drivers Version: 2.5 Kernel Version: 5.4.80 Hardware: All OS: Linux Tree: Mainline Status: NEW Severity: normal Priority: P1 Component: Video(DRI - non Intel) Assignee: drivers_video-dri@kernel-bugs.osdl.org Reporter: jordanleppert@gmail.com Regression: No
This is with a Vega64 card, connected to two monitors via DisplayPort 1.2.
When the connector is force-probed with a call to drmModeGetConnector, this is causing the connection to the monitor to disconnect, and reconnect.
I'm seeing this issue using Wayland, specifically a wlroots based compositor. This patch to wlroots (which unfortunately needs to be reverted) stopped the problem happening: https://github.com/swaywm/wlroots/pull/2482/files