Glitches on Obs-Studio using Slack Current

Hi guys,

Firstly, I would like to say that my english is very bad. Sorry about that.

When i choose capture screen using XSHM, that preview panel show with glitches like on this pictures

https://postimg.cc/image/n1nt1uhfr/
https://postimg.cc/image/8igo0gbg7/
https://postimg.cc/image/5bm4gvgqf/
https://postimg.cc/image/bcjtdyis7/
https://postimg.cc/image/k7knoia5j/

im using intel hd 4000, core i5 3a gen, slackware current updated with only gcc multilibs.
As a comparison i have a gentoo installed very similar to the slackware in question of packages and there i do not have this problem presented. My desktop with Slackware 14.2 + Nvidia dont have this problem too.

here my ffmpeg
https://pastebin.com/aAAjCQy9

and my obs-studio
https://pastebin.com/erZwFZT3

EDIT:
I recorded
https://youtu.be/PLPZwueeH6A

What do you think might be causing this?

Is the Gentoo install you mentioned installed on the computer with the intel hd 4000 and core i5 a gen?

Originally Posted by RadicalDreamer Is the Gentoo install you mentioned installed on the computer with the intel hd 4000 and core i5 a gen?

Yes, im using gentoo with dual boot.

In fact i managed to solve it but i did not find the problem yet.
I changed my DE Cinnamon to Mate and worked like a charm, i'm distrustful about cogl+clutter+metacity was de problem, with marco (mate) worked.

Changing the DE, lets say my ffmpeg, simplescreen, obs were working.