[kde] [Bug 409598] New: Individual windows stop updating until deactivated & reactivated (usually Chrome or VMware)

[Dan Barrett]

https://bugs.kde.org/show_bug.cgi?id=409598

            Bug ID: 409598
           Summary: Individual windows stop updating until deactivated &
                    reactivated (usually Chrome or VMware)
           Product: kde
           Version: unspecified
          Platform: Ubuntu Packages
                OS: Linux
            Status: REPORTED
          Severity: normal
          Priority: NOR
         Component: general
          Assignee: unassigned-bugs at kde.org
          Reporter: kde at blazemonger.com
  Target Milestone: ---

SUMMARY

Some windows, notably Google Chrome (any version from 2018 or later) and VMware
Workstation (versions 12-15) simply stop updating sometimes under KDE. The
problematic window seems to ignore all input, as if it were hung, but if you
click on any other window, then back to the problematic window, the updates
appear. Since the exact same symptom happens to different applications, I
believe the culprit is KDE.

For example, when a Chrome window develops the problem, you can click a web
link (say, to google.com) and absolutely nothing happens in the Chrome window.
But if you click to activate some other window, then click back the Chrome
window again, the Chrome window suddenly updates to google.com. (That is, the
click on the link DID have an effect on the window's state, but it wasn't
visible -- the effect didn't show up until the Chrome window lost focus and
regained focus.)

The problem usually happens to just ONE window at a time. I think I have seen
it happen to Konsole also, but I'm not sure.

This problem happens in Kubuntu 16.04 and 18.04. It's been happening for years.

STEPS TO REPRODUCE
1. The problem shows up randomly :-(, but when it happens, here is what to do.
2. Activate the problematic window and try to make some kind of obvious,
visible change.
3. Nothing visible happens in the window.
4. Click some OTHER window on screen, then click the problematic window.
5. The change you tried to make in step 2 instantly becomes visible.
6. The problem remains until I close the window.

OBSERVED RESULT

Changes to the problematic window have no effect until you click away and click
back.

EXPECTED RESULT

Changes to the problematic window should happen immediately.

SOFTWARE/OS VERSIONS
Linux/KDE Plasma: Kubuntu 18.04 (Ubuntu 18.04.2 LTS, kernel 4.15.0-54-generic)
KDE Plasma Version: 5.12.7
KDE Frameworks Version: 5.44.0
Qt Version: 5.9.5

ADDITIONAL INFORMATION

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