mayushii: External monitor via USB-C/DP Alt Mode does not support hotplug #69
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Reference: simon/nixos-config#69
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This has been occuring for at least a few days, if not weeks.
What happens
After connecting mayushii to the ThinkPad USB-C Dock Gen 2, which has an acer B277K connected via DP, sway shows the display as connected, though the monitor never wakes up.
This does not happen directly after a reboot
How to reproduce
Differential diagnosis
References
Logs
Does not happen reproducibly, so might be irrelevant:
Also happens on working kernel versions:
I just now discovered the issue tracker of freedesktop’s
drm/amd
repo, which helped me quite a bit.There is a huge amound of (mostly duplicate, but also varying) reports on the same/a similar issue starting with kernel 6.1. It should be fixed with kernel 6.1.9, but some users complain that it is not fixed. It might be fixed in 6.2-rc6.
A list of issues:
Fixed with 6.1.12 (maybe also older versions, I didn’t test it with them).
This isn’t fully solved yet, today I faced a similar issue, though not with re-plugging, but after changing the scale of one display, after which it went dark.
This occurs after an update, when sway gets reloaded.
Happened again, on reload. Trace:
This now happened twice in a row, after disabling scaling on external monitor while in clammshell mode. I needed to reboot for the external monitor to work again: