Using Ubuntu24.04 on a laptop, I experience glitchy artifacts/blocks/checkerboard pattern and what looks like some remarkable diagonal line.
This glitchy behaviour only appears in the following situation:
- Using Wayland (on X11 there is no glitching, so the HDMI cable/monitor is also not the issue)
- On the physical display (screen record on Wayland shows no glitching)
- On the external display connected to the HDMI port controlled by nvidia chip and drivers (buffer is located in nvidia chip according to nvidia-smi, around 50 MiB).
- There is no issue on other displays, which are managed by the intel iGPU (built-in screen and usb->displayport devices)
Video of the problem (enable subtitles/annotations!):
Installed versions:
gnome-shell-common/noble-updates,now 46.0-0ubuntu6~24.04.8 all
gnome-shell/noble-updates,now 46.0-0ubuntu6~24.04.8 amd64
gir1.2-mutter-14/noble-updates,now 46.2-1ubuntu0.24.04.8 amd64
libmutter-14-0/noble-updates,now 46.2-1ubuntu0.24.04.8 amd64
mutter-common-bin/noble-updates,now 46.2-1ubuntu0.24.04.8 amd64
mutter-common/noble-updates,now 46.2-1ubuntu0.24.04.8 all
Uname -r: 6.8.0-60-generic
Nvidia-smi:
+-----------------------------------------------------------------------------------------+
| NVIDIA-SMI 570.133.07 Driver Version: 570.133.07 CUDA Version: 12.8 |
|-----------------------------------------+------------------------+----------------------+
| GPU Name Persistence-M | Bus-Id Disp.A | Volatile Uncorr. ECC |
| Fan Temp Perf Pwr:Usage/Cap | Memory-Usage | GPU-Util Compute M. |
| | | MIG M. |
|=========================================+========================+======================|
| 0 NVIDIA GeForce GTX 1650 ... Off | 00000000:01:00.0 On | N/A |
| N/A 47C P8 6W / 40W | 52MiB / 4096MiB | 0% Default |
| | | N/A |
+-----------------------------------------+------------------------+----------------------+
+-----------------------------------------------------------------------------------------+
| Processes: |
| GPU GI CI PID Type Process name GPU Memory |
| ID ID Usage |
|=========================================================================================|
| 0 N/A N/A 3248 G /usr/bin/gnome-shell 41MiB |
+-----------------------------------------------------------------------------------------+
Note that the issue already exist for quite a while, also in previous driver/mutter versions.
If you need any additional info, feel free to ask.
Diagnostics attached (the problematic output is HDMI-2):
nvidia-bug-report.zip (273.0 KB)