Bug 422658

Summary:	Firefox and Brave windows become unresponsive under certain circumstances
Product:	[Plasma] kwin	Reporter:	RaitaroH <RaitaroHikami>
Component:	compositing	Assignee:	KWin default assignee <kwin-bugs-null>
Status:	RESOLVED WORKSFORME
Severity:	major	CC:	lemmyg
Priority:	NOR
Version First Reported In:	5.18.5
Target Milestone:	---
Platform:	Other
OS:	Linux
Latest Commit:		Version Fixed In:
Sentry Crash Report:

Description RaitaroH 2020-06-09 08:18:38 UTC

SUMMARY
A while ago I opened a bug for Waterfox https://github.com/MrAlex94/Waterfox/issues/1057 I noticed now this is not Waterfox specific and instead it seems to be a kwin issue because I have this issue in Firefox 77.0.1 and even in Brave 81.1.9.76 both under KDE Neon 5.18.5 on another laptop, and Waterfox on this laptop running Manjaro (details below).

STEPS TO REPRODUCE
I mention that the steps in that github bug report are not the only things that cause this! Also:
1. Open firefox or brave and place the window on another virtual desktop
2. Play some video on that desktop
3. Come back to it after... a while, not exactly sure how much
4. Window is frozen or transparent now

OBSERVED RESULT
For some reason the window is not responsive, it seems "frozen" but audio still plays. Brave still responds to mouse events (timeline for a video shows up on mouse hover as observed in an OBS test recording of this for a stream done in Brave), whereas Firefox mostly becomes transparent and additionally blurry. A simple kwin_x11 --replace seems to fix the issue, and then it comes back.

EXPECTED RESULT
These windows should not become unresponsive like that. This becomes especially annoying when I need to record some stream and then this happens.

SOFTWARE/OS VERSIONS
Operating System: Manjaro Linux
KDE Plasma Version: 5.18.5
KDE Frameworks Version: 5.70.0
Qt Version: 5.14.2
Kernel Version: 5.4.43-1-MANJARO
OS Type: 64-bit

Same stuff for KDE Neon 5.18.5 but kernel is 5.3.0-54-generic instead.

Comment 1 natherul0 2020-06-10 06:54:55 UTC

Noticed this issue as well on arch running zen kernel. I did observe (before the widgets stopped working in last update today) that when this happens RAM usage of the system spikes and when it becomes responsive again it has released RAM. 

Looks like for whatever reason Firefox eats up all RAM and then it crashes

Comment 2 natherul0 2020-06-10 07:01:49 UTC

Operating System: Arch Linux 
KDE Plasma Version: 5.19.0
KDE Frameworks Version: 5.70.0
Qt Version: 5.15.0
Kernel Version: 5.6.15-zen2-1-zen
OS Type: 64-bit

Comment 3 galder 2022-01-26 19:43:09 UTC

Please try with a newer version. Changing this 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).

Comment 4 Bug Janitor Service 2022-02-10 04:37:05 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
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!

Comment 5 Bug Janitor Service 2022-02-25 04:36:40 UTC

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!