Happens also in 20.04 (focal).
Have not tested yet in 22.04 (jammy).
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https://bugs.launchpad.net/bugs/1755501
Title:
GfxBench renders fullscreen content at wrong
Note that Mutter fullscreen handling isn't fully fixed even for Xorg,
see bug 1755501.
(It's not a regression, at least not a recent one, but something that
works fine with all other desktops. I think any use-case which doesn't
support resizing after it opens its non-resizable fullscreen window,
** Attachment added: "Unity: corresponding window hierarchy (GLFW = GfxBench
window)"
https://bugs.launchpad.net/ubuntu/+source/mutter/+bug/1755501/+attachment/5078206/+files/unity-xev-wininfo.txt
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Public bug reported:
Setup:
* FullHD monitor (1920x1080 resolution)
* Ubuntu 18.04 (pre-release) with Gnome/mutter 3.27.92, on top of X
* GfxBench benchmark suite from Kishonti: https://gfxbench.com/ (one of the
most common 3D benchmarks supporting Linux)
Example test-case:
* bin/testfw_app
** Attachment added: "Unity: X root window events"
https://bugs.launchpad.net/ubuntu/+source/mutter/+bug/1755501/+attachment/5078205/+files/unity-xev.txt
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** Attachment added: "Gnome: corresponding window hierarchy (GLFW = GfxBench
window)"
https://bugs.launchpad.net/ubuntu/+source/mutter/+bug/1755501/+attachment/5078204/+files/gnome-xev-wininfo.txt
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** Attachment added: "Gnome: X root window events"
https://bugs.launchpad.net/ubuntu/+source/mutter/+bug/1755501/+attachment/5078203/+files/gnome-xev.txt
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