> The protocol should be RDP - Remote Desktop Protocol. Indeed in Gnome
settings panel it's called Remote Login.

Both "Desktop Sharing" and "Remote Login" use RDP. Only the latter
presents the log-in screen, which according to the upstream maintainer
is the only place where you'd see these graphical artifacts.

> there is actually another bug somewhat close that you're involved in
already (https://bugs.launchpad.net/ubuntu/+source/gnome-remote-
desktop/+bug/2077538?comments=all). Because of this one (I think) we
have to add the user we setup in the "Remote Login" to both the video
and render groups

The credentials set in "Login Details" are for an RDP user, not a linux
user. The log-in screen **in plucky and older** is always presented by
the "gdm" user, which is why I proposed `usermod -a -G render gdm`.
Alternatively, if you don't want to guess the user then chmod 666 would
achieve the same result. Whether this is necessary for triggering this
bug, I don't know.

> otherwise it crashes. What do you think?

I'm not aware of bug 2077538 causing crashes. At most, it should prevent
GNOME Shell from doing hardware accelerated rendering and fall-back to
software rendering. But that is without NVIDIA remote desktop in the
mix: does it crash remote desktop on NVIDIA?

> The monitor: actually this fix is about headless sessions. But testing
with AND without a monitor would be safer. Adding to the test plan.

The upstream maintainer commented:
"""
CUDA seems to only work, when the application or service using it, runs as a 
user that has physical access to a monitor. In headless sessions, there is no 
physical monitor. Thus CUDA and NVENC should fail to initialize, and the 
session falls back to software encoding.
"""

which doesn't make a whole lot of sense to me, but maybe it's true at
least in this case?

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https://bugs.launchpad.net/bugs/2127792

Title:
  Images are corrupted on blackwell GPUs

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