[CCing stable list and Mario, who submitted this to 6.1.y] On 01.12.23 01:30, Bagas Sanjaya wrote: > > I notice a regression report on Bugzilla [1]. Quoting from it: > >> Since kernel version 6.1.57 I have problems with external monitor >> wakeup after suspend on Thinkpad X13 AMD Gen2 Notebook. >> >> Notebook is in docking station with closed lid. Suspend & Resume. >> The external monitor gets no signal. After randomly typing >> Ctrl+Alt+Fn for switchung consoles, the monitor at some point gets >> signal and is usable again. >> >> It worked with kernel 6.1.56. >> >> I managed to compile a 6.1.57 kernel and also a 6.1.64 kernel by >> reverting the changes from commit ec5fa9 "drm/amd/display: Adjust >> the MST resume flow" >> (https://github.com/torvalds/linux/commit/ec5fa9fcdeca69edf7dab5ca3b2e0ceb1c08fe9a?diff=split&w=1?diff=split&w=1) >> and with this suspend & resume worked like before without any >> problems. > [...] > [1]: https://bugzilla.kernel.org/show_bug.cgi?id=218211 We have a small problem here: that error might happen because ec5fa9fcdeca69 ("drm/amd/display: Adjust the MST resume flow") [v6.6-rc2] contains a bug or because something it needs was not backported to 6.1.y. Maybe one of the developers among the recipients has a idea. Oliver, but if none of them replies any time soon, it would be best if you'd check if 6.6 (and/or 6.7-rc) is affected as well; and if reverting it there fixes it, too. Ciao, Thorsten (wearing his 'the Linux kernel's regression tracker' hat) -- Everything you wanna know about Linux kernel regression tracking: https://linux-regtracking.leemhuis.info/about/#tldr If I did something stupid, please tell me, as explained on that page.