Arch Linux

nithisaran

Member

Registered: 2024-07-02

Posts: 2

I am only getting 25 fps on my external monitor.

I am using Linux 6.9.7-zen1-1-zen on an HP Vicrus Laptop with Nvidia driver 555.58. According to the settings, I have 75 fps on the external monitor. However, when I watch videos or perform actions, I can tell it's not running at 75 fps. For example, a 60 fps video on YouTube appears different compared to the built-in monitor. There's a noticeable difference.

V1del

Forum Moderator

Registered: 2012-10-16

Posts: 25,223

Re: I am only getting 25 fps on my external monitor.

Which graphical environment? Generally speaking most wayland implementations for this are somewhat in their infancy, and on xorg you want to make sure modeset=1 is enabled regardless so that PRIME sync can work: https://wiki.archlinux.org/title/PRIME# … ronization

Post a xorg and/or journal log of the faulty situation.

nithisaran

Member

Registered: 2024-07-02

Posts: 2

Re: I am only getting 25 fps on my external monitor.

I've set modeset=1 in the kernel for my Gnome on Wayland system. Is this the correct approach? 

Jul 02 20:47:32 archlinux kernel: Linux version 6.9.7-zen1-1-zen (linux-zen@archlinux) (
gcc (GCC) 14.1.1 20240522, GNU ld (GNU Binutils) 2.42.0) #1 ZEN SMP PREEMPT_DYNAMIC Fri, 28 Jun 2024 04:32:27 +0
000
Jul 02 20:47:32 archlinux kernel: Command line: initrd=\initramfs-linux-zen.img root=PARTUUID=532f0473-56b8-470a
-a363-78a6409e240f zswap.enabled=0 rootflags=subvol=@ rw rootfstype=btrfs nvidia_drm.modeset=1
Jul 02 20:47:32 archlinux kernel: x86/split lock detection: #AC: crashing the kernel on kernel split_locks and w
arning on user-space split_locks
Jul 02 20:47:32 archlinux kernel: BIOS-provided physical RAM map:

seth

Member

From: Won't reply 2 private help req

Registered: 2012-09-03

Posts: 75,939

Re: I am only getting 25 fps on my external monitor.

Post a xorg and/or journal log of the faulty situation.

We'll need a bit more data than a vague rendition of your feeligns

I think gnome caps at 60Hz, if you run that sync against a 75Hz output you'll get judder, but that doesn't really explain "25 fps" (which is, I assume, an eyballed estimation?)
For an optimus/prime system you'd get there w/ double-syncing.

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