Environment
| Component | Details |
|---|---|
| OS | Ubuntu 24.04 LTS |
| Kernel | 6.17.0-19-generic (#19~24.04.2-Ubuntu SMP PREEMPT_DYNAMIC) |
| GPU | NVIDIA GeForce RTX 4070 Ti |
| Driver | nvidia-driver-580-open 580.126.09 |
| Session | X11, GNOME Shell 46.2 / mutter 46.2 |
| nvidia_drm modeset | 1 |
| NVreg_PreserveVideoMemoryAllocations | 1 |
Application running at time of freeze:
-
Lutris (Flatpak) 0.5.22
-
Battle.net Launcher via GE-Proton10-34 / umu-launcher 1.4.0
-
DXVK enabled, WINEESYNC=1, WINEFSYNC=1
Behavior
Pressing Ctrl+L to lock the screen while Battle.net is running via Lutris/GE-Proton causes the display to freeze permanently. TTY remains accessible. systemctl restart gdm recovers the session.
Does not occur when Battle.net is closed before pressing Ctrl+L. 100% reproducible on demand.
What the logs show
1. DBus trace at moment of freeze dbus-monitor --session "interface='org.gnome.ScreenSaver'"
Lock request reached gnome-shell. No reply was ever returned. Log ends here.
method call sender=:1.60 -> destination=:1.74
path=/org/gnome/ScreenSaver; member=Lock
method call sender=:1.74 -> destination=:1.33
path=/org/gnome/ScreenSaver; member=Lock
2. strace on gnome-shell at moment of freeze strace -p <gnome-shell pid> -e trace=all -T -tt
gnome-shell blocked indefinitely on poll() on fd=10. Confirmed via ss as the X11 Unix socket connected to Xorg. gnome-shell sent a request to Xorg and Xorg never responded.
poll([{fd=10, events=POLLIN}], 1, -1
3. strace on Xorg at moment of freeze strace -p <xorg pid> -e trace=all -T -tt
Xorg was actively writing to client sockets and not blocked or hung when SIGALRM arrived from the kernel. After SIGALRM the process stopped responding entirely.
17:09:14.886203 writev(11, ...) = 32
17:09:14.886213 writev(11, ...) = 32
17:09:14.886222 writev(11, ...) = 32
17:09:14.900162 --- SIGALRM {si_signo=SIGALRM, si_code=SI_KERNEL} ---
4. Kernel log
Clean throughout. No GPU errors, no hung task warnings, no OOM events.