Please try (in this order):
* Selecting 'Ubuntu on Wayland' from the login screen before you enter
your password (the icon in the bottom right corner). Now does the
flashing also happen on the desktop?
* The official Ubuntu kernel, which is version 5.4.
* A slightly older kernel like 5.8.
* Editing /etc/gdm3/custom.conf and uncomment:
#WaylandEnable=false
to:
WaylandEnable=false
** Tags added: amdgpu hybrid nvidia
** Summary changed:
- Log in screen flashes on and off until I log in
+ [amdgpu] [nvidia] Log in screen flashes on and off until I log in
** Package changed: xorg (Ubuntu) => xserver-xorg-video-amdgpu (Ubuntu)
** Summary changed:
- [amdgpu] [nvidia] Log in screen flashes on and off until I log in
+ [amdgpu] Log in screen flashes on and off until I log in
** Also affects: mutter (Ubuntu)
Importance: Undecided
Status: New
** Changed in: mutter (Ubuntu)
Status: New => Incomplete
** Changed in: xserver-xorg-video-amdgpu (Ubuntu)
Status: New => Incomplete
** No longer affects: xserver-xorg-video-amdgpu (Ubuntu)
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https://bugs.launchpad.net/bugs/1902749
Title:
[amdgpu] Log in screen flashes on and off until I log in
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