Issue:
Screen starts flickering whenever my laptop wakes up after a sleep or blank screen.
Steps to reproduce:
- Let your laptop go to sleep or let its display turn blank.
- After wake-up, the display starts flickering.
My machine:
I am using ASUS FX505DT which has KDE and i3wm installed.
PS: I also used to face this issue on my previous Ubuntu 19.10 install with Unity.
Specifications:
Processor: AMD® Ryzen™ 5 3550H Processor
Graphics Card: AMD Vega 8 Graphics Card
Graphics Card: NVIDIA® GeForce® GTX 1650 , with 4GB GDDR5 VRAM
I know this question might seem like a duplicate of Ubuntu 16.10 screen flicker after monitor wake up, but I'm still posting this question because no solution or workaround are fixing this for me.
Update 1: I have funneled down the cause for this issue. It seems to happen only after my laptop wakes up from being suspended.
Update 2: I can also trigger this bug by switching my display mode from 120Hz to 48Hz. The screen starts flickering as soon as I switch to 48Hz. Reverting back stops the flickering.
1 Answer
I have the identical problem, amd cpu and gpu, but on PC. it only flickers after waking from sleep, and then I can stop it by reducing the refresh rate [to 100hz]. But if I put the refresh rate back to 144, it flickers.
edit: 3900x and 5700xt with a freesync ultrawide monitor at 1080p.
changing kde plasma to 100hz stops flickering, though the monitor can do 144 before suspending. after waking from a suspend, it will flicker at 144hz
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