I have a laptop with hybrid Intel+Nvidia graphics.
After update of Plasma from 5.25.5-4 to 5.26.2-1 I got Nvidia GPU sensors missing for the widgets and in the System Monitor.
Eventually I found out that all the sensors are there, but the Nvidia GPU name changed from gpu0 to gpu1. Therefore the sensors can’t be found by the old name, e.g gpu/gpu0/usage (see the screenshot). I believe it happened because before the update I have switched from Nvidia to Intel graphics.
Is there a way to change the Nvidia GPU name back to gpu0 so that the widgets and System Monitor can pick the sensors? Otherwise I have to manually change all the missing sensors.
the solution is pretty simple. You have to ensure, that the nvidia drivers are loaded as early as possible. This also helps with some other problems, the nvidia card may cause. Like with DisplayLink or hibernation for example.
Find the MODULES section and add there inside the quotes or brackets nvidia nvidia_modeset nvidia_uvm nvidia_drm
Save out and rebuild the initramfs with sudo mkinitcpio -P
Ok, since todays update, the problem is back. I am running now on 525.60.11 and the values are set to 0. The System Monitor detects the Nvidia correctly. The name sensor spits out the name of my card. But all others dont work. I will try to roll back to the 5.20 drivers and see if its the driver, that causes this.