I'm on a multi-monitor setup with 2 monitors. I open Present Windows, then I move the mouse from my primary monitor to the secondary, Present Windows starts to drag and only refreshes @ 1 frame / second. If I filter by text, and the resulting window is on the secondary monitor, it also lags. Note: lag is observed on both monitors. i7 3rd gen w/intel xf86-video-intel drivers. Reproducible: Always Steps to Reproduce: 1. I'm on a multi-monitor setup with 2 monitors. 2. I open Present Windows. 3. Then I move the mouse from my primary monitor to the secondary. Actual Results: Present Windows starts to drag. Expected Results: Keep it fluid and smooth without lagging.
A way to always reproduce it: 1. Have a 2 monitor setup and some windows on both. 2. Open KDE Present Windows. 3. Move mouse from primary monitor to secondary. If Preview Windows it is not lagging already, move mouse back to primary and again to secondary monitor.
Please try the modesettings driver for xorg. I'm quite sure it will fix the issue.
Correction: I am NOT using xf86-video-intel. Specifically: xf86-video-intel 1:2.99.917+711+gbd33d0a-1 (xorg-drivers xorg) X.org Intel i810/i830/i915/945G/G965+ video drivers this package is NOT installed in my Arch.
that's the first time in month that didn't help... Can you check top for high cpu usage?
Yes. With Present Windows opened, and moving the mouse from one monitor to the other, in htop I can see kwin as the top process using the CPU. The usage is around 5-6% on an intel i7 (3rd gen). The lagging stops itself after around 3 seconds, but I can see that windows highlighting or raising is a tidy bit slower in FPS after the lag finishes. CPU usage in kwin returns to the normal 2-3% after that.
on the other hand 5-6 % cpu usage is not so much that it would explain a blocking of mouse movement.
Another colleague replicated in his Fedora with 5.8 LTS. On his i7 (4rd gen), the lag happens only for 1 second, but it's still noticeable. He has xorg-x11-drv-intel installed with SNA enabled.
This issue report is quite old. Can you please confirm, that it still persists with KDE 5.23?
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!
This bug has been in NEEDSINFO status with no change for at least 30 days. The bug is now 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 Thank you for helping us make KDE software even better for everyone!