Bug 386530

Summary:	Unreal Engine Menus Lag/Slow
Product:	[Plasma] plasmashell	Reporter:	wolfyrion <kyriacos>
Component:	general	Assignee:	David Edmundson <kde>
Status:	RESOLVED NOT A BUG
Severity:	normal	CC:	plasma-bugs
Priority:	NOR
Version:	master
Target Milestone:	1.0
Platform:	Arch Linux
OS:	Linux
Latest Commit:		Version Fixed In:
Sentry Crash Report:

Description wolfyrion 2017-11-04 17:56:38 UTC

The Unreal Editor menus are very slow,it looks like the menus are lagging, it takes around 3-6 sec to move from one menu to another. 
The FPS from 120 goes down to 20-0 FPS and freezes if I am moving the mouse a bit quickly around the menus.

(I am using Plasma with a high end pc, Nvidia 1080Ti and AMD Threadripper 1950x) 

I tested also Unity Engine and is working fine a bit of lag there as well but is unnoticed.

With another DE (tested MATE) is working fine no delays and not lag at all.
I have posted this problem to unreal engine forums but I guess this has to do with KDE since in other Desktop Environments is working fine.

cheers
K

Comment 1 David Edmundson 2017-11-05 17:28:26 UTC

If unreal editor is slow, talk to unreal editor.

Comment 2 wolfyrion 2017-11-06 06:00:29 UTC

Thanks for your prompt reply but I dont understand why this problem has to do with Unreal Engine since in all other Desktop Environments (XFCE,MATE,GNOME etc) Unreal Engine is working fine but in KDE is not.

Anyway thanks for the support , maybe it has to do with Nvidia Drivers I will post in their forums.

Comment 3 David Edmundson 2017-11-06 11:53:16 UTC

I understand what you're saying, but with the same logic... every other window in KDE is fine.

I can't think of anything we could be doing that would make another application freeze.

You could try with kwin compositing off (alt+f12).