SUMMARY There is microstuttering with compositor enabled, meaning that dragging windows is not smooth, nor is scrolling in Firefox. STEPS TO REPRODUCE 1. Enabled compositor 2. Drag any window or scroll a webpage OBSERVED RESULT Animations are not fluid. EXPECTED RESULT Animations should be fluid like with compositor disabled. SOFTWARE VERSIONS (available in About System) KDE Plasma Version: 5.13.5 KDE Frameworks Version: 5.50.0 Qt Version: 5.11.1 ADDITIONAL INFORMATION Graphics: Device-1: Advanced Micro Devices [AMD/ATI] Hawaii PRO [Radeon R9 290/390] driver: amdgpu v: kernel Display: x11 server: X.Org 1.19.6 driver: amdgpu,ati unloaded: fbdev,modesetting,radeon,vesa resolution: 1920x1080_74.00~74Hz OpenGL: renderer: AMD Radeon R9 200 Series (HAWAII DRM 3.26.0 4.18.9-92.current LLVM 6.0.1) v: 4.5 Mesa 18.1.6 Connected via DisplayPort
I started seeing micro stuttering when starting to drag a window since I updated from neon 16.04 to neon 18.04
@kai can you run hotspot on it please.
I forgot to say that I'm running Solus KDE with kernel 4.18.9. The issue is not recent though, I've been running Solus KDE since May or June.
Dear Bug Submitter, This bug has been in NEEDSINFO status with no change for at least 15 days. Please provide the requested information as soon as possible and set the bug status as REPORTED. Due to regular bug tracker maintenance, if the bug is still in NEEDSINFO status with no change in 30 days the bug will be closed as RESOLVED > WORKSFORME due to lack of needed information. For more information about our bug triaging procedures please read the wiki located here: https://community.kde.org/Guidelines_and_HOWTOs/Bug_triaging If you have already provided the requested information, please mark the bug as REPORTED so that the KDE team knows that the bug is ready to be confirmed. Thank you for helping us make KDE software even better for everyone!
> Please provide the requested information as soon as possible OK, no problem, but what are the "requested information"?
Please provide the output of qdbus org.kde.KWin /KWin supportInformation
Here: https://paste.kde.org/pwty88tg6
If you disable the Dim Inactive effect, are animations fluid?
No, there's no difference. Only by disabling the compositor everything is fluid as in Windows.
I'm not 100% sure because I have no means to objectively measure this, but it looks like the animations to switch from a virtual desktop to another are butter smooth.
I've been experiencing this for several months, at least the since the beginning of 2018. I've been forced to running kwin with compositing disabled and use compton instead. If someone can give me some pointers on what might be going on and where, I'm willing to devote time to fixing this in the code.
With the radeon driver, the issue in not present. I don't know if it's amdgpu fault only or a combination of both Plasma and amdgpu, but radeon is working well.
I don't think this is limited to just amdgpu, since I'm running an Intel HD 620 configuration with i965.
I finally managed to run Wayland with my system and I can confirm microstuttering is not present with this protocol. Also, there's much less lag when dragging windows: the window immediately follows the mouse cursor.
You can close this. I found where the issue is: https://bugs.freedesktop.org/show_bug.cgi?id=109384
Thanks for the update.