Since 5.21 there are glitches or something like that on my screen

Hello everyone,

it’s me again and i found a glitch in Plasma 5.21. My browser window is moving 1pixel up and down again. Especially on lines like the webadress field or the title field here in the forum it’s moving up and down very fast. Seems like my refresh rate wouldn’t be 60 Hz, but i checked it and it is at 60 Hz.

As far as i can say, it’s showing only in my browser windows no where else.

Does anybody have a solution or idea what’s wrong with my Plasma?

Thank you.

Not sure…
Give us your:

inxi -Fxxxz

Also, what’s your display scaling set to in Plasma settings?

  Kernel: 5.10.16-hardened1-1-hardened x86_64 bits: 64 compiler: gcc 
  v: 10.2.1 Desktop: KDE Plasma 5.21.0 tk: Qt 5.15.2 wm: kwin_x11 
  dm: SDDM Distro: EndeavourOS base: Arch Linux 
  Type: Desktop Mobo: ASRock model: H110M-HDS serial: <filter> 
  UEFI [Legacy]: American Megatrends v: P7.50 date: 01/20/2018 
  Info: Dual Core model: Intel Core i3-6100 bits: 64 type: MT MCP 
  arch: Skylake-S rev: 3 L2 cache: 3 MiB 
  flags: avx avx2 lm nx pae sse sse2 sse3 sse4_1 sse4_2 ssse3 vmx 
  bogomips: 29608 
  Speed: 800 MHz min/max: 800/3700 MHz Core speeds (MHz): 1: 800 2: 800 
  3: 800 4: 800 
  Device-1: Intel HD Graphics 530 vendor: ASRock driver: i915 v: kernel 
  bus ID: 00:02.0 chip ID: 8086:1912 class ID: 0300 
  Display: x11 server: X.Org 1.20.10 compositor: kwin_x11 driver: 
  loaded: intel unloaded: fbdev,modesetting,vesa 
  resolution: 1920x1080~60Hz s-dpi: 96 
  Message: Unable to show advanced data. Required tool glxinfo missing. 
  Device-1: Intel 100 Series/C230 Series Family HD Audio vendor: ASRock 
  driver: snd_hda_intel v: kernel bus ID: 00:1f.3 chip ID: 8086:a170 
  class ID: 0403 
  Sound Server: ALSA v: k5.10.16-hardened1-1-hardened 
  Device-1: Realtek RTL8111/8168/8411 PCI Express Gigabit Ethernet 
  vendor: ASRock driver: r8169 v: kernel port: e000 bus ID: 02:00.0 
  chip ID: 10ec:8168 class ID: 0200 
  IF: enp2s0 state: up speed: 100 Mbps duplex: full mac: <filter> 
  Local Storage: total: 223.57 GiB used: 98.44 GiB (44.0%) 
  ID-1: /dev/sda vendor: A-Data model: SP550 size: 223.57 GiB 
  speed: 6.0 Gb/s serial: <filter> rev: 0AA 
  ID-1: / size: 219.06 GiB used: 98.44 GiB (44.9%) fs: ext4 
  dev: /dev/sda1 
  Alert: No Swap data was found. 
  System Temperatures: cpu: 37.5 C mobo: N/A 
  Fan Speeds (RPM): N/A 
  Processes: 165 Uptime: 1m wakeups: 0 Memory: 7.48 GiB 
  used: 1.41 GiB (18.8%) Init: systemd v: 247 Compilers: gcc: 10.2.0 
  Packages: pacman: 1087 Shell: Bash v: 5.1.4 running in: konsole 
  inxi: 3.3.00

I have nothing changed in Plasma Display scaling. Set to 100% as normal.

Have to admit that this glitch is showing up on desktop screen with eos-welcome. So it isn’t the browsers Fault right?

When i scroll down and up in the browser, the font is pixelating or however you call this “feature”.

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Indeed, looks more like driver / graphical problem.
As far as i understand this is PC and it have only Intel (CPU) video, correct?

I’ve noticed you’re using hardened Kernel - that may be very well the reason, can you please try LTS Kernel + reboot to see if issue is gone?

Yes just a desktop pc with an onboard GPU (Intel graphics).

The problem shows up even with linux-lts.

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@dalto @jonathon @joekamprad
Any ideas?
Intel / Mesa / X11…?

Shouldn’t be Plasma, otherwise everyone would see that

Have you tried creating creating


Section "Device"
        Identifier  "Intel Graphics"
        Driver      "intel"
        Option      "AccelMethod"  "uxa"
        Option      "DRI" "False"


Section "Device"
   Identifier  "Intel Graphics"
   Driver      "intel"
   #Option      "AccelMethod"  "sna"
   Option      "TearFree"    "true" 
   Option      "DRI"    "3" 



i’m not a Plasma user, but just for fun, you could play around with the compositor settings. → systemsettings → use the search → search for “compositor”

@ricklinux: Now it’s the second time that my onboard graphics is making trouble again. First attempt with first entry works. But i don’t understand why it works one day and another day it’s broken?!

@T-Flips: Hey, thank you. I tried already to improve my glitch with this settings, but it didn’t work.

Did you have that file or did you have to create it? If it wasn’t there before then i can see possibly issues as different updates may have contributed to it and it may be intermittent also? Hopefully this fixes it.

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I Had to create it.

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