| Summary: | Some Kwin vsync settings produce severe screen flickering | ||
|---|---|---|---|
| Product: | [Plasma] kwin | Reporter: | Ike <fancyname+kdebugtracking> |
| Component: | compositing | Assignee: | KWin default assignee <kwin-bugs-null> |
| Status: | RESOLVED MOVED | ||
| Severity: | major | CC: | lemmyg, nate |
| Priority: | NOR | ||
| Version First Reported In: | 5.14.5 | ||
| Target Milestone: | --- | ||
| Platform: | Debian testing | ||
| OS: | Linux | ||
| Latest Commit: | Version Fixed/Implemented In: | ||
| Sentry Crash Report: | |||
| Attachments: |
Kwin support information while vsync is set to "Full screen repaints" is enabled
Kwin support information while "Enable compositor on startup" is disabled [corrected] Kwin support information while "Enable compositor on startup" is disabled |
||
|
Description
Ike
2019-11-20 18:57:25 UTC
Created attachment 124033 [details]
Kwin support information while "Enable compositor on startup" is disabled
Added output of qdbus org.kde.KWin /KWin supportInformation while it is flickering and one while its fine.
> In this case, I only noticed some flickering when typing in the password > on the lock screen and sometimes in kde panels. If that's the case, then it's either an issue lower in software stack(e.g. driver) or faulty hardware. > After my system updated KWin to 4:5.14.5-1+b1 (debian bullseye) and rebooted Have you tried downgrading kwin package? (In reply to Ike from comment #1) > Created attachment 124033 [details] > Kwin support information while "Enable compositor on startup" is disabled > > Added output of qdbus org.kde.KWin /KWin supportInformation while it is > flickering and one while its fine. Hmm, according to this, the compositor is enabled. Created attachment 124111 [details]
[corrected] Kwin support information while "Enable compositor on startup" is disabled
I did something wrong while creating the first attachment where compositing is disabled. I replaced it with a correct one.
(In reply to Vlad Zahorodnii from comment #2) Thanks for the quick reply! > > In this case, I only noticed some flickering when typing in the password > > on the lock screen and sometimes in kde panels. > If that's the case, then it's either an issue lower in software stack(e.g. > driver) or faulty hardware. To be precise, it's not happening on the login manager before kde is started but when kde is locked, e.g. when waking up from sleep. > > After my system updated KWin to 4:5.14.5-1+b1 (debian bullseye) and rebooted > Have you tried downgrading kwin package? Not yet, I'll try this out until the end of the week. > (In reply to Ike from comment #1) > > Created attachment 124033 [details] > > Kwin support information while "Enable compositor on startup" is disabled > > > > Added output of qdbus org.kde.KWin /KWin supportInformation while it is > > flickering and one while its fine. > Hmm, according to this, the compositor is enabled. Oops, that was my fault, I didn't restart kde properly. I uploaded a corrected file. changing this old ticket to needs more info.
Bugs placed into NEEDSINFO status will receive a reminder if the ticket:
Is at least 15 days old
Has not received any comment within 15 days
If a bug remains in NEEDSINFO for another 15 days with no comment, it will be closed as RESOLVED > WORKSFORME.
If a bug remains in NEEDSINFO with a comment provided within less than 15 days, no action will be taken (as it does not meet the above criteria).
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! Wow, sorry guys for ignoring this for such a long time, shame on me... I was actually using my system without the compositor since this issue. I've just retested everything. The situation has changed for good but there are still some problems: - When using OpenGL 2.0 or 3.1 and setting vsync to "Re-use screen content" there is no flickering, but most windows don't refresh anymore at all. The system is totally unusable in this setting. - In all other settings, i.e. other vsync options unter OpenGL and all vsync options under XRender (incl. Re-use screen content) everythings fine, only observed flickering in the taskbar when hovering over it (as described in my original post) How should we proceed with this? I can still try to downgrade to the kwin version before my initial post if you tell me how I can do this without breaking my system 😅 Current SOFTWARE/OS VERSIONS kwin-x11 - 4:5.20.5-1 Linux: Debian testing (Bullseye), kernel 5.10.0-11-amd64 KDE Plasma Version: 5.20.5 KDE Frameworks Version: 5.78.0 Qt Version: 5.15.2 Hello, thanks for your reply. I'm not sure how you could downgrade the version in a safe way. I'm just a volunteer triaging tickets :) Because this is an old ticket and now you are getting different problems, what I would recommend is to start over. Maybe try latest plasma version 5.24.2 and if you still have any issue report it in a new ticket. what do you think? Yes, sounds good great thanks |