https://bugs.freedesktop.org/show_bug.cgi?id=107082
--- Comment #6 from mikhail.v.gavrilov@gmail.com --- (In reply to Michel Dänzer from comment #5)
Sounds like a GNOME issue. The kernel driver doesn't do any implicit scaling, it's all up to userspace.
I don't believe that sshd can hang because of gnome-shell bug.