I tested cosmic-greeter 0d7624b as display manager on a handful of graphics setups and found consistent behaviour across all of them.
I looked at integrated Intel and AMD graphics, discrete Nvidia and AMD desktop graphics, and a hybrid laptop with Intel iGPU and Nvidia dGPU.
Subjectively, the cosmic-session did feel like it loaded (drawing panel, dock, etc.) more slowly through cosmic-greeter vs. gdm, though that maybe a result of the desktop background being present in the DM.
All systems successfully logged in when first booted. On all systems, I could logout of the user session, and return to the DM login screen. I could login and logout multiple times.
On all systems, after several cycles of logging in and out, I would attempt another login and the user session would never launch. This usually took the form - symptomatically - of seeing the password prompt in cosmic-greeter disappear, and then nothing happening. Cosmic-greeter is responsive (e.g. I can shutdown with the GUI power button) in this state, it is just that the cosmic-session never starts. I need to look into this further.
I did not see any issue with cosmic-greeter displaying correctly when I logged out through the panel applet. However, on all hardware, I did see TTY1 getting stuck on a grey screen with a cursor when I exited my cosmic-session using the Super + Shift + Escape shortcut. On all hardware, I also saw the lockscreen provided by cosmic-greeter similarly getting stuck on a grey screen when triggered with the Super + Escape shortcut, but have yet to try it through the applet.
I tested cosmic-greeter 0d7624b as display manager on a handful of graphics setups and found consistent behaviour across all of them.
I looked at integrated Intel and AMD graphics, discrete Nvidia and AMD desktop graphics, and a hybrid laptop with Intel iGPU and Nvidia dGPU.
Subjectively, the cosmic-session did feel like it loaded (drawing panel, dock, etc.) more slowly through cosmic-greeter vs. gdm, though that maybe a result of the desktop background being present in the DM.
All systems successfully logged in when first booted. On all systems, I could logout of the user session, and return to the DM login screen. I could login and logout multiple times.
On all systems, after several cycles of logging in and out, I would attempt another login and the user session would never launch. This usually took the form - symptomatically - of seeing the password prompt in cosmic-greeter disappear, and then nothing happening. Cosmic-greeter is responsive (e.g. I can shutdown with the GUI power button) in this state, it is just that the cosmic-session never starts. I need to look into this further.
I did not see any issue with cosmic-greeter displaying correctly when I logged out through the panel applet. However, on all hardware, I did see TTY1 getting stuck on a grey screen with a cursor when I exited my cosmic-session using the
Super + Shift + Escapeshortcut. On all hardware, I also saw the lockscreen provided by cosmic-greeter similarly getting stuck on a grey screen when triggered with theSuper + Escapeshortcut, but have yet to try it through the applet.