Screen flickering

[shmu26]

Sometimes I come back to my computer, which was at lock screen, and when I log in again I see screen flickering. I can’t connect it to any particular event, and it doesn’t happen every time. It is a custom-built desktop with i7 ninth gen, only integrated graphics, meaning that I have no graphics card or GPU. The only thing I can think of is that the electric current was unstable and caused issues. But I don’t see this happening on other OSes, only on Manjaro.
Here is some system info

System:
  Host: shmuel-Manjaro Kernel: 5.9.1-1-MANJARO x86_64 bits: 64 
  Desktop: KDE Plasma 5.19.5 Distro: Manjaro Linux 
Machine:
  Type: Desktop Mobo: ASUSTeK model: PRIME B365M-A v: Rev X.0x 
  serial: <superuser/root required> UEFI: American Megatrends 
  v: 1203 date: 10/10/2019 
CPU:
  Topology: 8-Core model: Intel Core i7-9700 bits: 64 type: MCP 
  L2 cache: 12.0 MiB 
  Speed: 4482 MHz min/max: 800/4700 MHz Core speeds (MHz): 
  1: 4482 2: 4471 3: 4468 4: 4471 5: 4461 6: 4477 7: 4460 
  8: 4465 
Graphics:
  Device-1: Intel UHD Graphics 630 driver: i915 v: kernel 
  Device-2: IMC Networks XHC Camera type: USB driver: uvcvideo 
  Display: x11 server: X.Org 1.20.9 driver: intel 
  unloaded: modesetting resolution: 1: 1920x1080~60Hz 
  2: 1920x1080~60Hz 
  OpenGL: renderer: Mesa Intel UHD Graphics 630 (CFL GT2) 
  v: 4.6 Mesa 20.1.8 
Audio:
  Device-1: Intel 200 Series PCH HD Audio driver: snd_hda_intel 
  Device-2: JMTek LLC. type: USB 
  driver: hid-generic,snd-usb-audio,usbhid 
  Sound Server: ALSA v: k5.9.1-1-MANJARO 
Network:
  Device-1: Realtek RTL8111/8168/8411 PCI Express Gigabit 
  Ethernet 
  driver: r8169 
  IF: enp3s0 state: up speed: 1000 Mbps duplex: full 
  mac: a8:5e:45:e2:87:3c 
Drives:
  Local Storage: total: 2.26 TiB used: 685.08 GiB (29.7%) 
  ID-1: /dev/sda vendor: Kingston model: SA400S37480G 
  size: 447.13 GiB 
  ID-2: /dev/sdb vendor: Toshiba model: HDWD120 size: 1.82 TiB 
Partition:
  ID-1: / size: 76.03 GiB used: 33.02 GiB (43.4%) fs: ext4 
  dev: /dev/sda5 
Swap:
  ID-1: swap-1 type: file size: 4.00 GiB used: 4.2 MiB (0.1%) 
  file: /swapfile 
Sensors:
  System Temperatures: cpu: 29.8 C mobo: 27.8 C 
  Fan Speeds (RPM): N/A 
Info:
  Processes: 268 Uptime: 31m Memory: 15.50 GiB 
  used: 7.03 GiB (45.3%) Shell: Bash inxi: 3.1.05

[The_Quantum_Alpha]

Howdy!

Can you go into System Setting >> Hardware >> Display and Monitor >> Compositor and change the tearing prevention to “Full screen repaints”, see if it fixes the issue, please?

May also want to change the Compositor Rendering Back-end to either OpenGL 3, or Xrander!

Hope this helps, have a wonderful day!

[shmu26]

Thanks for the great ideas. I did both. Time will tell if it helps.

[Fabby]

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