Second Monitor Lags After Update


I updated my laptop today and now when I connect my second monitor, it lags terribly. But only the second monitor, not my laptop’s built-in display. I have tried the solutions according to this reddit post: but I wasn’t able to use the first solution since I don’t have x-server settings in nvidia-settings. So I tried the second solution, but that had no impact.

When looking at the pacman log, I saw that the zen kernel I was using got updated as well as what I think is the nvidia drivers for the GTX 1660 I was using, so there might be a downgrade needed? I am not sure.

If you have any advice, please let me know, it would be greatly appreciated.

lspci -k

inxi -faz

pacman log

General Specs:
KDE Plasma Version: 5.27.3
KDE Frameworks Version: 5.104.0
Qt Version: 5.15.8
Kernel Version: 6.2.9-zen1-1-zen (64 bit)
Graphics Platform: X11
Processor 16 Core AMD Ryzen 7 4800H with Raedon Graphics
Manufacturer: HP
Product Name: OMEN Laptop 15-en0xxx

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I saw this as well. I had to downgrade from 530 series to 525 series to get the external monitor to work (it would only refresh if the mouse was moved, it would only switch on post-boot if the mouse moved into the second monitor area). The downside is that I saw a degradation in performance for some games when going from 530 to 525 (e.g. American Truck Simulator has a rock solid 60 FPS under 530 series, but 525 sees drops to 30 FPS at points).

Can you elaborate by what you mean with 530 series and 525 series? Are you actually changing your graphics card? If so that’s unfortunately not possible for me on laptop.

No - the driver series. The recent upgrades moved the nVidia drivers to 530.41.03-1. That upgrade, from 525.89, caused the performance issues on the second monitor for me. I used the downgrade tool to go back to the earlier drivers. That solved everything for me.

You may need to install the downgrade package (yay -S downgrade)

In my case I then used :

sudo downgrade nvidia-dkms nvidia-utils

to go back to 525.89.02-2

There’s also more observations here :

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Gotcha. After downgrading the drivers, second monitor no longer lags. Thank you for your help.

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