Bug 391800 - KWin gets low performance on intel hd620@1920x1080 when compositor is on.
Summary: KWin gets low performance on intel hd620@1920x1080 when compositor is on.
Status: RESOLVED WORKSFORME
Alias: None
Product: kwin
Classification: Plasma
Component: compositing (show other bugs)
Version: 5.12.3
Platform: Other Linux
: NOR normal
Target Milestone: ---
Assignee: KWin default assignee
URL:
Keywords: triaged
Depends on:
Blocks:
 
Reported: 2018-03-13 08:22 UTC by me
Modified: 2018-10-29 02:21 UTC (History)
0 users

See Also:
Latest Commit:
Version Fixed In:


Attachments

Note You need to log in before you can comment on or make changes to this bug.
Description me 2018-03-13 08:22:07 UTC
I'm using archlinux with I5-7200U(using modesetting ddx driver).
When I enable compositor(opengl 3.1, and opengl2 is also),  kde's animation will be laggy(about 50fps).And other application's animation will also be laggy(e.g.: chrome's scroll animation) , but when I disable compositor, their animation will be smooth.
I also have a intel hd4000 device, it doesn't have this issue. hd4000 can run kde with very smooth animation on 1920x1080. But hd620's performance is much better than hd4000's.
Comment 1 Martin Flöser 2018-03-13 18:50:28 UTC
I'm sorry, but here we cannot do much. We don't apply any special handling for Intel devices, it's all the same to us. If the one works well and the other doesn't, it means it's below us. You might want to ask user support on ideas on how to tune the IPG.
Comment 2 me 2018-03-14 14:36:45 UTC
(In reply to Martin Flöser from comment #1)
> I'm sorry, but here we cannot do much. We don't apply any special handling
> for Intel devices, it's all the same to us. If the one works wel l and the
> other doesn't, it means it's below us. You might want to ask user support on
> ideas on how to tune the IPG.

Please have a look at this https://www.reddit.com/r/kde/comments/84bdff/kwin_gets_low_performance_on_intel_hd6201920x1080/dvofqyv/

This bro's solution does fix my problem, so I think it's a bug of kwin.
Comment 3 Martin Flöser 2018-03-14 18:33:23 UTC
Please provide the output of
qdbus org.kde.KWin /KWin supportInformation
Comment 4 me 2018-03-15 01:41:58 UTC
(In reply to Martin Flöser from comment #3)
> Please provide the output of
> qdbus org.kde.KWin /KWin supportInformation

Output: https://fars.ee/92jf
Comment 5 Martin Flöser 2018-03-15 05:22:38 UTC
According to the debug output your screen has only a refresh rate of 60 Hz. Increasing the refresh rate should have no effect. Something is slowing down your system.

Does the problem persist if you use default config options? I noticed that quite a few compositor, decoration and effect settings are changed. Please reboot after resetting to default.
Comment 6 Christoph Feck 2018-03-30 18:21:48 UTC
If you can provide the information requested in comment #5, please add it.
Comment 7 Christoph Feck 2018-04-26 22:12:27 UTC
To further investigate this issue, KDE developers need the information requested in comment #5. If you can provide it, or need help with finding that information, please add a comment.
Comment 8 Andrew Crouthamel 2018-09-28 03:22:25 UTC
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 set the bug status 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!
Comment 9 Andrew Crouthamel 2018-10-29 02:21:16 UTC
Dear Bug Submitter,

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!