linux-kernel - Re: [git pull] drm for 6.8

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Message-ID: <CAOVeLGRxXfs4wxSmB2ULZS72NvJkWQvZyPRz0rAmQyFtL39ekw@mail.gmail.com>
Date: Wed, 24 Jan 2024 07:31:10 -0800
From: Donald Carr <sirspudd@...il.com>
To: Vlastimil Babka <vbabka@...e.cz>
Cc: Dave Airlie <airlied@...il.com>, Linus Torvalds <torvalds@...ux-foundation.org>, 
	Daniel Vetter <daniel.vetter@...ll.ch>, dri-devel <dri-devel@...ts.freedesktop.org>, 
	LKML <linux-kernel@...r.kernel.org>, 
	Linux regressions mailing list <regressions@...ts.linux.dev>
Subject: Re: [git pull] drm for 6.8

On Wed, Jan 24, 2024 at 7:06 AM Vlastimil Babka <vbabka@...e.cz> wrote:
> When testing the rc1 on my openSUSE Tumbleweed desktop, I've started
> experiencing "frozen desktop" (KDE/Wayland) issues. The symptoms are that
> everything freezes including mouse cursor. After a while it either resolves,
> or e.g. firefox crashes (if it was actively used when it froze) or it's
> frozen for too long and I reboot with alt-sysrq-b. When it's frozen I can
> still ssh to the machine, and there's nothing happening in dmesg.
> The machine is based on Amd Ryzen 7 2700 and Radeon RX7600.
>
> I've bisected the merge commits so far and now will try to dig into this
> one. I've noticed there was also a drm fixes PR later in the merge window but
> since it was also merged into rc1 and thus didn't prevent the issue for me,
> I guess it's not relevant here?
>
> Because the reproduction wasn't very deterministic I considered a commit bad
> even if it didn't lead to completely frozen desktop and a forced reboot.
> Even the multi-second hangs that resolved were a regression compared to 67
> anyway.
>
> If there are known issues and perhaps candidate fixes already, please do tell.

I am experiencing the exact same symptoms; sddm (on weston) starts
perfectly, launching a KDE wayland session freezes at various points
(leading to plenty of premature celebration), but normally on the
handoff from sddm to kde (replete with terminal cursor on screen)

Working perfectly as of the end of 6.7 final release, broken as of 6.8 rc1.
Sometimes sddm can be successfully restarted via ssh, other times
restarting sddm is slow and fails to complete.

Yours sincerely,
Donald