Bug 389411 - Okular and X unresponsive when resizing Okular's sidebar
Summary: Okular and X unresponsive when resizing Okular's sidebar
Status: REPORTED
Alias: None
Product: okular
Classification: Applications
Component: general (show other bugs)
Version: 1.3.1
Platform: Other Linux
: NOR normal
Target Milestone: ---
Assignee: Okular developers
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2018-01-25 12:21 UTC by null
Modified: 2021-10-16 20:00 UTC (History)
3 users (show)

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Description null 2018-01-25 12:21:56 UTC 
Open the PDF mentioned in https://phabricator.kde.org/D8379#157345 and change the width of the sidebar. Moving the mouse to a different window does not change the cursor anymore, window switching does not work until Okular finished rendering. Okular's UI is unresponsive too, while normally rendering is done in a different thread.

Same behaviour when testing in IceWM, so not KWin related.

Additional notes copied from https://phabricator.kde.org/D9328:
I cannot switch windows (or even move window focus via focus-follows-mouse), which is odd because normally even with all CPU cores busy (here some are idle, still) that's not a problem. I can move the mouse, but the pointer does not change. Maybe Okular has a blocking mouse cursor change call, or does too many of them?

When filing the bug, Bugzilla suggested Bug 155652, so maybe the problem is related to scrollbars and some Qt code path?