** Description changed: - ystem Details: + System Details: OS: Ubuntu 24.04.3 LTS Kernel: 6.14.0-34-generic NVIDIA Driver: 580.95.05 GPU: NVIDIA GeForce RTX 3060 Ti (PCI:01:00.0) Motherboard: [CPU with onboard GPU at PCI:10:00.0] Display Managers: lightdm Desktop Environment: GNOME (ubuntu-xorg session) Connected Displays: HDMI-2: 1920x1080 DP-4: 2560x1440 DP-5: 2560x1440 Issue: X11 session starts successfully NVIDIA kernel modules load: nvidia_uvm, nvidia_drm, nvidia_modeset xrandr correctly detects all 3 monitors and outputs configuration Screenshots render correctly to all monitors But: Physical monitors receive no video signal - blank screens with no display output Workaround: Wayland session works perfectly with all 3 monitors displaying correctly Using xrandr --auto to mirror displays sometimes provides partial signal Manual xrandr positioning commands execute without error but don't restore signal Key Observations: Identical hardware boots other Ubuntu 24.04.3 LTS on separate drive - all 3 monitors work immediately without configuration Issue persists after: driver reinstall, xorg.conf regeneration, kernel update DRM device detection: /dev/dri/card1 and /dev/dri/card2 created correctly Xorg.0.log shows successful initialization of nvidia-drm but no display output errors Dual GPU system (NVIDIA discrete + AMD onboard) - AMD GPU is blacklisted, doesn't affect issue Steps to Reproduce: Install Ubuntu 24.04.3 with NVIDIA 580 driver Connect 3 displays to NVIDIA RTX 3060 Ti outputs Boot to X11 session Observe blank displays despite xrandr showing correct configuration Expected Behavior: All 3 monitors should display X11 desktop immediately upon login, as they do in Wayland session and on other OSes. Actual Behavior: X11 session runs but produces no video output to any monitor. Logs: dmesg | grep nvidia - shows successful module loading cat /var/log/Xorg.0.log - shows successful X server initialization xrandr --query - shows all monitors connected with correct resolutions/positions
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2130926 Title: Ubuntu 24.04.3 LTS X11 session does not display properly To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg-server/+bug/2130926/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
