I recently did a clean install of Fedora 44 KDE Plasma on a Lenovo Legion 9
When the screen locker kicks in the fan and cpu spike and dont stop / return to normal until I log back in. When I d login I see the apps on my desktop but the background and panel are all black for anywhere from 10 to about 45seconds, then the desktop background and panel show up.
I connected via ssh while this was happening and ran a top -n 1 to a file, here is what I got:
This is a known pattern with the lock screen and Nvidia. When the screen locks, the greeter or a wallpaper effect can get stuck spinning on the GPU. Try switching your lock screen wallpaper to a plain color or image instead of any animated or Plasma effect type, that often kills the spike. Also make sure kscreenlocker and your Nvidia drivers are fully updated. The black delay on login points the same direction.
I tried changing the screen locker background to a solid color, this is much better but it does not completely resolve the issue, the fan/cpu still spike but more to a mid speed based on the sound of the fan as opposed to as high as it can go.
The only real fix I have found so far is to do the following every time I walk away from the computer:
unplug the docking station (which disconnects the 2 external screens)
close the laptop lid
Note this does not put it to sleep as I have the setting “When Laptop lid closed” (in system settings → Power management) to “Lock Screen”
And to answer the above question about firefox, I still see this issue even if I close all firefox windows before letting the laptop go idle
The issue has changed as of the last few updates, now if I forget to unplug my monitors before I step away then when I unlock (fans blasting) then the monitors never recover, I just get a set of blank screens, I can see the windows on the current virtual desktop but they are completely unresponsive
I suspect reverting back to F43 is my best next step since I need a working laptop for work
it seems the main issue with the unlocker is with my biggest monitor, a Samsung LS57CG952NNXZAOdyssey Neo G9 57" Dual 4K UHD (7680 x 2160) 240Hz Curved Screen UltraWide Gaming Monitor
I think this because I have another location I use and there i have 2 of these monitors:
Dell U4025QW 39.7" 5K WQHD (5120 x 2160) 120Hz Wide Curved Screen Monitor
and in the location with the 2 dell U4025QW monitors I dont have this issue.
Also, it seems that if I lock the desktop manually (right click on the desktop and choose ‘Lock Screen’ then I don’t have the unlocking issue or the high cpu/fan issue or the blank screens when unlocking.
I was wrong with respect to finding a fix, even without the screen locker I get the same black screen behavior and have to reboot if I let the screens turn off for some time. I thought I could avoid going back to F43 but I was wrong.
Try this. It’s slightly awkward on a system with Nvidia drivers because you need the additional packages to allow the driver kernel module to be rebuilt.
If you don’t already have the updates-archive repo available, set it up:
Wait a few minutes for Nvidia driver module build to complete.
Check the driver was rebuilt:
dnf list --installed "kmod-nvidia*"
In the output you’re expecting to see a version of kmod-nvidia-... specific to the kernel version you installed.
Reboot.
That example uses kernel 7.0.12. To see other available kernels, check the update history on Koji. You can replace the string 7.0.12-200.fc44 in step 2 with the corresponding version for a different fc44 kernel.
