linux-kernel - Re: [REGRESSION BISECTED] 6.8-rc1 - Wayland hangs when connecting via VNC or RDP

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Message-ID: <CADBGO7-V40=pw+UjAptYu4fAQiDoGequbZLmpO=HoAyXs3hYaQ@mail.gmail.com>
Date: Wed, 24 Jan 2024 14:57:57 -0700
From: Paul Zimmerman <pauldzim@...il.com>
To: Luben Tuikov <ltuikov89@...il.com>
Cc: Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>, Maxime Ripard <mripard@...nel.org>, 
	Thomas Zimmermann <tzimmermann@...e.de>, David Airlie <airlied@...il.com>, Daniel Vetter <daniel@...ll.ch>, 
	dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org
Subject: Re: [REGRESSION BISECTED] 6.8-rc1 - Wayland hangs when connecting via
 VNC or RDP

Ah, I see that Mario already posted a patch for a "frozen desktop" problem here:

https://lore.kernel.org/lkml/CAOVeLGSczkyhj61T8SZc2cK1Cjy2izV6URVa2422kcfy8ONYFw@mail.gmail.com/T/#t

and I can confirm that patch fixes my problem as well. Sorry for the noise.

Thanks,
Paul

On Wed, Jan 24, 2024 at 1:21 PM Paul Zimmerman <pauldzim@...il.com> wrote:
>
> I forgot to say what graphics driver I'm using. It is amdgpu.
>
> p.s. Sorry for the bad formatting in my previous email, it has been a while
> since I posted to LKML.
>
> Thanks,
> Paul
>
> On Wed, Jan 24, 2024 at 12:47 PM Paul Zimmerman <pauldzim@...il.com> wrote:
> >
> > When I attempt to connect via VNC or RDP to my Ubuntu desktop, the Wayland
> > server seems to hang. The desktop GUI no longer works either locally or
> > remotely. I can still log in via ssh, so the system is still alive,
> > but the GUI is
> > frozen. If I boot into Xorg instead, everything works fine. Kernel 6.7
> > works fine
> > also.
> >
> > I bisected this to commit f7fe64ad0f22 "drm/sched: Split free_job into
> > own work item".
> > That commit does not revert cleanly however.
> >
> > I don't see anything in dmesg when this happens. Here is a snippet from
> > journalctl when it happens:
> > Jan 23 16:14:30 paulz-Precision-5820-Tower systemd[2826]: Started
> > Tracker metadata extractor.
> > Jan 23 16:14:55 paulz-Precision-5820-Tower systemd[2826]: Started
> > Application launched by gnome-session-binary.
> > Jan 23 16:16:47 paulz-Precision-5820-Tower
> > gnome-remote-desktop-daemon[4158]: [16:16:47:810] [4158:4896]
> > [ERROR][com.freerdp.core.peer] - Incorrect RDP header.
> > Jan 23 16:16:47 paulz-Precision-5820-Tower
> > gnome-remote-desktop-daemon[4158]: [16:16:47:810] [4158:4896]
> > [ERROR][com.freerdp.core.peer] - peer_recv_callback:
> > CONNECTION_STATE_ACTIVE - peer_recv_pdu() fail
> > Jan 23 16:16:47 paulz-Precision-5820-Tower
> > gnome-remote-desktop-daemon[4158]: [16:16:47:810] [4158:4896]
> > [ERROR][com.freerdp.core.transport] - transport_check_fds:
> > transport->ReceiveCallback() - -1
> > Jan 23 16:16:47 paulz-Precision-5820-Tower gnome-remote-de[4158]:
> > Unable to check file descriptor, closing connection
> > Jan 23 16:16:47 paulz-Precision-5820-Tower systemd[1]:
> > run-user-1001-gnome\x2dremote\x2ddesktop-cliprdr\x2d9Tp4LD.mount:
> > Deactivated successfully.
> >
> > This is on an x86_64 Xeon system running Ubuntu 22.04.3.  Any hints on how to
> > debug this further? Is there a way to turn on additional debug prints for this?
> >
> > Thanks,
> > Paul