MUTTER_DEBUG_USE_KMS_MODIFIERS=0
fixes the issue. gdm3 also works now.
** Changed in: gnome-shell (Ubuntu)
Status: Incomplete => New
** Changed in: mutter (Ubuntu)
Status: Incomplete => New
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https://bugs.launchpad.net/bugs/1966808
Title:
[amdgpu][radeon] gnome-shell Wayland sessions fail to start (Failed to
lock front buffer on /dev/dri/card1: drmModeAddFB2WithModifiers
failed: Invalid argument)
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