https://bugs.kde.org/show_bug.cgi?id=431446

vindicator <nroycea+...@gmail.com> changed:

           What    |Removed                     |Added
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                 CC|                            |nroycea+...@gmail.com

--- Comment #10 from vindicator <nroycea+...@gmail.com> ---
I think I have this issue as well, but I'm on 5.21.0.
I don't think I've experienced this "level" of an issue before and this is the
first time it's happened since I updated this past weekend.

My "normal" rendering issue comes from when I have "OpenGL" set as the
compositor.
Not immediately, but over time, I'll encounter rendering issues with video
playback that stutters/jitters/skips.
My "workaround" is simply to use "XRender" which is what I had done previously
(and it is still using xrender).
I'll also put out that that simply switching between OpenGL versions in the
compositor list sets things back on track... for awhile.

I am using X11. (I've learned my lesson with Wayland)

You stated that "restarting plasmashell" ("--replace"?) fixed it for you, but
not for me.
I also did a "replace" for kwin, but still no success.
While konsole rendered keystrokes just fine, no such luck with typing in Chrome
address bar.
One abnormal oddity that was probably leading up to the breakage (or letting me
know something was amiss before it all broke down) was while watching recorded
tv in kodi, there was some small/minor skippage (even though I was still using
xrender).

The only action I could take was CTRL-ALT-DEL my way to "logout".

Xorg:
"[ 68637.069] (EE) intel(0): Failed to submit rendering commands (Bad address),
disabling acceleration."
I don't know what time that was in relation to uptime.

Journalctl: (time which the clock stopped rendering was 09:07:##)
*****
Feb 23 09:08:46 computerName plasmashell[1441]:
file:///usr/share/plasma/plasmoids/org.kde.plasma.taskmanager/contents/ui/main.qml:464:
TypeError: Cannot read property 'length' of undefined
Feb 23 09:07:57 computerName kwin_x11[1404]: qt.qpa.xcb: QXcbConnection: XCB
error: 9 (BadDrawable), sequence: 63014, resource id: 15333177, major code: 14
(GetGeometry), minor code: 0
Feb 23 09:07:57 computerName kwin_x11[1404]: qt.qpa.xcb: QXcbConnection: XCB
error: 3 (BadWindow), sequence: 63013, resource id: 15333177, major code: 3
(GetWindowAttributes), minor code: 0
Feb 23 09:07:55 computerName kwin_x11[1404]: qt.qpa.xcb: QXcbConnection: XCB
error: 9 (BadDrawable), sequence: 62514, resource id: 15333173, major code: 14
(GetGeometry), minor code: 0
Feb 23 09:07:55 computerName kwin_x11[1404]: qt.qpa.xcb: QXcbConnection: XCB
error: 3 (BadWindow), sequence: 62513, resource id: 15333173, major code: 3
(GetWindowAttributes), minor code: 0
Feb 23 09:05:06 computerName plasmashell[1441]:
file:///usr/share/plasma/plasmoids/org.kde.plasma.notifications/contents/ui/NotificationPopup.qml:116:15:
QML QQuickItem: Binding loop detected for property "height"
*****

If it happens again, THEN I'll give "KWIN_USE_BUFFER_AGE=0" a try. This may
just be a one-off for me.
I don't know if you'll still see this, but it just happened while I went to
another tab to look at other bugs. I'm going to try to save this.

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