Interestingly Xwayland thinks the screen is portrait:
XWAYLAND2 connected 2160x3840+0+0 (0x3d3) normal (normal left inverted
right x axis y axis) 190mm x 340mm
but the BIOS and Xorg think it is landscape:
[ 0.495406] efifb: mode is 3840x2160x32, linelength=15360, pages=1
[ 52.062] (II) modeset(0): Modeline "3840x2160"x60.0 533.25 3840
3888 3920 4000 2160 2163 2168 2222 -hsync -vsync (133.3 kHz eP)
so that makes me think it's just mutter/gnome-shell giving the wrong
info to Xwayland and certain apps.
Do you find the same bug in Xorg sessions? Try logging into 'Ubuntu'
instead of 'Ubuntu on Wayland'.
** Tags added: amdgpu hybrid
** Package changed: xorg (Ubuntu) => mutter (Ubuntu)
** Also affects: gnome-shell (Ubuntu)
Importance: Undecided
Status: New
** Changed in: gnome-shell (Ubuntu)
Status: New => Incomplete
** Changed in: mutter (Ubuntu)
Status: New => Incomplete
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https://bugs.launchpad.net/bugs/1905228
Title:
DIsplay Rotates to Portrait Mode when Certain Apps Open
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