When I attempt to connect via VNC or RDP to my Ubuntu desktop, the Wayland server seems to hang. The desktop GUI no longer works either locally or remotely. I can still log in via ssh, so the system is still alive, but the GUI is frozen. If I boot into Xorg instead, everything works fine. Kernel 6.7 works fine also. I bisected this to commit f7fe64ad0f22 "drm/sched: Split free_job into own work item". That commit does not revert cleanly however. I don't see anything in dmesg when this happens. Here is a snippet from journalctl when it happens: Jan 23 16:14:30 paulz-Precision-5820-Tower systemd[2826]: Started Tracker metadata extractor. Jan 23 16:14:55 paulz-Precision-5820-Tower systemd[2826]: Started Application launched by gnome-session-binary. Jan 23 16:16:47 paulz-Precision-5820-Tower gnome-remote-desktop-daemon[4158]: [16:16:47:810] [4158:4896] [ERROR][com.freerdp.core.peer] - Incorrect RDP header. Jan 23 16:16:47 paulz-Precision-5820-Tower gnome-remote-desktop-daemon[4158]: [16:16:47:810] [4158:4896] [ERROR][com.freerdp.core.peer] - peer_recv_callback: CONNECTION_STATE_ACTIVE - peer_recv_pdu() fail Jan 23 16:16:47 paulz-Precision-5820-Tower gnome-remote-desktop-daemon[4158]: [16:16:47:810] [4158:4896] [ERROR][com.freerdp.core.transport] - transport_check_fds: transport->ReceiveCallback() - -1 Jan 23 16:16:47 paulz-Precision-5820-Tower gnome-remote-de[4158]: Unable to check file descriptor, closing connection Jan 23 16:16:47 paulz-Precision-5820-Tower systemd[1]: run-user-1001-gnome\x2dremote\x2ddesktop-cliprdr\x2d9Tp4LD.mount: Deactivated successfully. This is on an x86_64 Xeon system running Ubuntu 22.04.3. Any hints on how to debug this further? Is there a way to turn on additional debug prints for this? Thanks, Paul
