I have the same problem. I upgraded Ubuntu 22.04 to version 24.04, since then sometimes after logging in the desktop does not appear, only the X cursor on a black background.
I switched to the console by pressing ctrl + alt + f3 and restarted the computer with the reboot command. Then it works for me - most of the time. If after logging in the desktop appears, then everything is fine, the error does not appear during work, during PC sleep or during long sleep. I suspected that the old computer was to blame (CPU Intel i5-4960, motherboard ASUS Z97-A, RAM 32 GB, SSD SATA III - WD blue 1 TB) I bought a new computer (CPU Intel i5-14400, motherboard ASROCK B760 PRO RS/D4 WIFI, RAM 32 GB, SSD M.2 NVMe - WD black 1TB) I copied the UBUNTU 24.04 installation from (SSD SATA III) to the new (SSD M.2 NVMe) using ddrescue. Now I have exactly the same UBUNTU 24.04 on both the old computer and the new computer and the error is the same. This tells me that it is not a hardware problem. The problem is in UBUNTU 24.04 - the worst thing is that sometimes the login is successful, sometimes it needs to be restarted. I'm attaching prevjournal.txt ** Attachment added: "I'm attaching prevjournal.txt" https://bugs.launchpad.net/ubuntu/+source/gnome-shell/+bug/2089709/+attachment/5848349/+files/prevjournal.txt -- You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to gnome-shell in Ubuntu. https://bugs.launchpad.net/bugs/2089709 Title: Intermittent blank screen after logging in on Ubuntu 24.04 with X11 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-shell/+bug/2089709/+subscriptions -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs