Can't move windows by dragging title bar; can't resize windows

[Rocko]

After a recent update in 21.04, I can no longer move windows with integrated title bars (eg nautilus, firefox, gnome-terminal) by clicking on the taskbar and dragging. I can't resize them either - although the mouse icon changes, when I click and move the mouse the window doesn't resize.

I can move a window holding the Super key and clicking near the window, but it's a bit hit-and-miss - sometimes it moves a different window.

Windows without an integrated titlebar seem to be fine (eg thunderbird, synaptic).

ProblemType: Bug
DistroRelease: Ubuntu 21.04
Package: gnome-shell 3.38.3-3ubuntu1
ProcVersionSignature: Ubuntu 5.10.0-14.15-generic 5.10.11
Uname: Linux 5.10.0-14-generic x86_64
NonfreeKernelModules: nvidia_modeset nvidia
ApportVersion: 2.20.11-0ubuntu59
Architecture: amd64
CasperMD5CheckResult: unknown
CurrentDesktop: ubuntu:GNOME
Date: Tue Mar 9 09:10:45 2021
DisplayManager: gdm3
RelatedPackageVersions: mutter-common 3.38.3-3ubuntu1
SourcePackage: gnome-shell
UpgradeStatus: Upgraded to hirsute on 2021-02-24 (12 days ago)

[Daniel van Vugt (vanvugt)]

From what I've seen, this is just one of the symptoms of bug 1917926.

[Rocko (rockorequin)]

Yep, I'd say it's that bug. It's fine under Wayland.

In 21.04 will it be possible to select a Wayland session from the login screen without commenting out the gdm rule that disables Wayland if the nvidia module is loaded? I've got prime-select set to on-demand, so nvidia is loaded even though intel is the main driver, but Wayland still works - it's just not presented by default and there is no indication given as to why.

(It'd be even better if nvidia-prime actually worked in Wayland...)

[Daniel van Vugt (vanvugt)]

https://discourse.ubuntu.com/t/trying-wayland-by-default-again/20575/68?u=vanvugt