Arch Linux

uchouT

Member

Registered: 2025-02-04

Posts: 20

[SOLVED] Help: input lag in KDE

I've recently installed Arch Linux for the first time and encountered an issue with input responsiveness in KDE Plasma. When typing in applications like Konsole, Firefox, or even on the login screen, my input sometimes freezes and only registers when I move the mouse.
I followed the Arch Wiki carefully during installation, including setting up Wayland and the appropriate GPU drivers, but I'm not sure what might be causing this issue.
Here's my environment:

                  -`                     i@uchouT-laptop
                 .o+`                    ---------------
                `ooo/                    OS: Arch Linux x86_64
               `+oooo:                   Host: HP Envy x360 2-in-1 Laptop 14-fa0xxx
              `+oooooo:                  Kernel: Linux 6.13.1-arch1-1
              -+oooooo+:                 Uptime: 1 hour, 51 mins
            `/:-:++oooo+:                Packages: 754 (pacman)
           `/++++/+++++++:               Shell: bash 5.2.37
          `/++++++++++++++:              Display (SDC4197): 2880x1800 @ 120 Hz (as 1440x900) in 14" [Built-]
         `/+++ooooooooooooo/`            DE: KDE Plasma 6.2.5
        ./ooosssso++osssssso+`           WM: KWin (Wayland)
       .oossssso-````/ossssss+`          WM Theme: Breeze
      -osssssso.      :ssssssso.         Theme: Breeze (Light) [Qt], Breeze [GTK2/3]
     :osssssss/        osssso+++.        Icons: Breeze [Qt], breeze [GTK2/3/4]
    /ossssssss/        +ssssooo/-        Font: Ubuntu (10pt) [Qt], Ubuntu (10pt) [GTK2/3/4]
  `/ossssso+/:-        -:/+osssso+-      Terminal: /dev/pts/4
 `+sso+:-`                 `.-/+oso:     CPU: AMD Ryzen 7 8840HS w/ Radeon 780M Graphics (16) @ 5.13 GHz
`++:.                           `-/+/    GPU: AMD Phoenix3 [Integrated]
.`                                 `/    Memory: 2.74 GiB / 30.65 GiB (9%)
                                         Swap: 0 B / 32.00 GiB (0%)
                                         Disk (/): 39.10 GiB / 146.59 GiB (27%) - ext4
                                         Disk (/home): 439.67 MiB / 789.41 GiB (0%) - ext4
                                         Local IP (wlan0): 192.168.1.18/24
                                         Battery (PABAS0241231): 44% [Discharging]
                                         Locale: en_US.UTF-8

I suppose there must be something wrong with my graphic setting, but idk how to identify.
Any help is appreciated, thanks.

Last edited by uchouT (2025-02-05 17:32:04)

uchouT

Member

Registered: 2025-02-04

Posts: 20

Re: [SOLVED] Help: input lag in KDE

Additionally, when I hover the mouse over the taskbar application icon, the input works normally. I'm really curious about the cause, but I find no answer through log or google.

V1del

Forum Moderator

Registered: 2012-10-16

Posts: 24,274

Re: [SOLVED] Help: input lag in KDE

Sounds like the PSR issues, try adding "amdgpu.dcdebugmask=0x10" to your kernel params and follow https://bbs.archlinux.org/viewtopic.php?id=301280 if that happens to be the resolution.

uchouT

Member

Registered: 2025-02-04

Posts: 20

Re: [SOLVED] Help: input lag in KDE

Sounds like the PSR issues, try adding "amdgpu.dcdebugmask=0x10" to your kernel params and follow https://bbs.archlinux.org/viewtopic.php?id=301280 if that happens to be the resolution.

That works!!! Thank you so much!!
Wish you have a wonderful day.