Low FPS on second monitor

consent_ · 2025-11-04 11:52:34

Recently purchased external monitor for laptop. And everything run poorly on it, even my window manager Niri. I can't understand what's is the root of the issue.

Specs:
Lenovo Ideapad 3 Gaming
Intel Core I5 10300H
Nvidia GTX 1650Ti Nvidia Open drivers
External monitor: Redmi Monitor 1A FullHD 100HZ
Arch Linux 6.17.6

seth · 2025-11-04 12:38:47

Intel Core I5 10300H
Nvidia GTX 1650Ti Nvidia Open drivers

Assuming this is a hybrid system: is the external monitor the only enabled output?

https://wiki.archlinux.org/title/PRIME#Reverse_PRIME
Don't try to disable DRI3 - it'll get you software rendering.

You could try to run Niri on the nvidia GPU (preferably by completely disabling the IGP if your BIOS/UEFI allows that)

consent_ · 2025-11-06 07:51:04

seth wrote:

Assuming this is a hybrid system: is the external monitor the only enabled output?

No, both of my monitors are enabled.

seth wrote:

https://wiki.archlinux.org/title/PRIME#Reverse_PRIME

Don't try to disable DRI3 - it'll get you software rendering.

After adding xorg.conf my system can't run Display Server. And running this command:

 xrandr --setprovideroutputsource nvida Intel

give this output:

Could not find provider with name nvida

seth wrote:

You could try to run Niri on the nvidia GPU (preferably by completely disabling the IGP if your BIOS/UEFI allows that)

I tried to disable Intel Graphics from BIOS, but there's no an option to do that.

Xylerfox · 2025-11-06 13:24:21

You mentioned you're using Niri, it would be helpful if you also mention if you're using Xorg or Wayland.

If at all possible, it would be nice to troubleshoot if it is a software or hardware related issue. To do that, you'd need to install another DE, I'm most familiar with KDE Plasma, but it's your choice. You need to check whether it's a hardware or software related issue, and if it's related to your chosen Window Manager. I would simply install plasma_desktop (just the core Plasma stuff), and try that. Could make a Rsync clone of your root drive and revert to it after you do your stuff.

We need to isolate what's the core of the issue. Loads of hybrid GPU laptops, the Nvidia GPU is not connected to any display out ports, which makes troubleshooting this stuff difficult...

consent_ · 2025-11-06 14:26:05

Xylerfox wrote:

You mentioned you're using Niri, it would be helpful if you also mention if you're using Xorg or Wayland.

Wayland

And I've already tried to test second monitor in others WMs and DEs and had the same result in Hyprland and KDE Plasma. So i don't think it's Niri's side problem.

And for some reason after running

 xrandr --listproviders

I have this output:

 Providers: number : 0

seth · 2025-11-06 15:16:36

xrandr on wayland is borderline meaningless.
I don't think niri runs on X11 anyway?

The idea of the link was to indicate

The wiki wrote:

Currently when only external display is enabled, you will only get 1 FPS.

The xorg config there won't help for sure with that.

I tried to disable Intel Graphics from BIOS, but there's no an option to do that.

I don't see how to control the GPU in https://yalter.github.io/niri/Configura … ction.html but you could simply blacklist i915 and/or xe

consent_ · 2025-11-06 15:24:07

So there is no solution for my issue? Because when i915 is blacklisted Xorg can't run on my system

seth · 2025-11-06 15:30:48

Please post your Xorg log, https://wiki.archlinux.org/title/Xorg#General but why are you trying to run X11 when

And everything run poorly on it, even my window manager Niri.

consent_ · 2025-11-06 15:36:09

Cause I have been following Arch Wiki's article section you've sent me

seth · 2025-11-06 15:38:23

I did not link that part of the article at all and that config there is most likely wrong for your HW (there's a hardcoded bus id…)

for OUT in /sys/class/drm/card*; do echo $OUT; edid-decode $OUT/edid; echo "================="; done

You'll need https://archlinux.org/packages/extra/x86_64/v4l-utils/ but I'm pretty sure you're running into the reverse prime issue and in that case should be able to run niri on the nvidia GPU only and at normal FPS.

Arch Linux

#1 2025-11-04 11:52:34

Low FPS on second monitor

#2 2025-11-04 12:38:47

Re: Low FPS on second monitor

#3 2025-11-06 07:51:04

Re: Low FPS on second monitor

#4 2025-11-06 13:24:21

Re: Low FPS on second monitor

#5 2025-11-06 14:26:05

Re: Low FPS on second monitor

#6 2025-11-06 15:16:36

Re: Low FPS on second monitor

#7 2025-11-06 15:24:07

Re: Low FPS on second monitor

#8 2025-11-06 15:30:48

Re: Low FPS on second monitor

#9 2025-11-06 15:36:09

Re: Low FPS on second monitor

#10 2025-11-06 15:38:23

Re: Low FPS on second monitor

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