Weird horizontal lines appear in Manjaro

Any chance the resolution got changed? What is it showing in display properties?

Resolution is what it should be: fHD.
When I created a new user, there were no such lines. But after some time, when I relogin to the new user, the lines came there too.
Seems like some kind of bad config.

What baffles me is that I did nothing. Maybe it happened due to an update.

Yes. It does seems like a update issue since it doesn't appear on Login screen.

Which destop manager is it? KDE??

It's sad since I have to use windows until this issue is resolved.
Can't use Manjaro with the issue.

RumbaMon19 said:

Which destop manager is it? KDE??

Click to expand...

It's KDE.

Vyom said:

It's sad since I have to use windows until this issue is resolved.
Can't use Manjaro with the issue.

It's KDE.

Click to expand...

Last I was using XFCE on manjaro , I too had these issues. I was able to fix it by:-

Uncheck Settings Manager > Window Manager Tweaks > Compositor > Show shadows under dock windows.

try this in KDE as well, Might fix the problem.

SOURCE

I was not able to find the option under Compositor.
So I checked Display Configuration and saw that the frequency was set to 60 Hz.
Changing it to 50 Hz have resolved the issue!!

Damn!

Thanks everyone!

Press the Print Screen button and take a screenshot. Share it here and we'll see if it replicates in the screenshot.

Change your cable and try again, 50 hz is a workaround. It shouldnt be a problem in the first place.

So it happened again. But this time I knew the solution.
I left my PC running Manjaro for few hours. And when I logged in back, there were the lines again.

So I again changed the frequency from 60 Hz to 50Hz and the lines were gone.

Seems some updates re-enable 60Hz on its own. :/