SUMMARY This occurs on X11 only. The monitor could be turned off manually, or let it turn off on its own after the set time in Energy Saving settings. STEPS TO REPRODUCE 1. Make sure you have a corner or edge configured to trigger an effect. 2 . Turn off the monitor, or let it turn off due to inactivity. 3 . Wake up the monitor, and move the pointer to the corner/edge to trigger the effect. 4 . Keep moving the pointer even after the effect is triggered without stopping. OBSERVED RESULT The effect gets re-triggered over and over as long as the pointer moves after hitting the corner/edge. The "reactivation delay" is completely ignored. EXPECTED RESULT Before the monitor turns off, you can't keep re-triggering the effect by moving the pointer non-stop to the corner/edge, so I expect this to be true at all times. This behaves well in Wayland. SOFTWARE/OS VERSIONS Linux: ArchLinux KDE Plasma Version: 6.0.1 KDE Frameworks Version: 6.0.0 Qt Version: 6.6.2 ADDITIONAL INFORMATION Restarting KWin resolves the issue.
Also, it seems that triggering the effects is not blocked by fullscreen applications, when this happens. Still present in KWin 6.0.3 / Qt 6.6.3. I've attempted to find the commit that introduced it, but, presumably because I was only building KWin, compilation fails. I'm assuming this might be hardware-depended, since others would have stumble upon it by now. I'm on a desktop, with an AMD RDNA1 GPU using Mesa. I'm attaching glxinfo.
Created attachment 168257 [details] glxinfo
Reproducible on: KDE Plasma Version: 6.1.0 KDE Frameworks Version: 6.3.0 Qt Version: 6.7.1
I cannot reproduce in X11, can you confirm what action you had in your corner and ideally a video of the issue triggering.
Created attachment 174084 [details] Triggering a hot corner after turning off the monitor. I have the Overview effect on the upper right and the Grid effect on the bottom right corner. I have reproduce the issue using a new user to make sure it's not one of my user's settings. In the attached video, I'm moving the cursor constantly toward the upper right corner. At the first part of it, you can see how the Overview effect is constantly re-triggered. Then, I restart kwin and show that triggering the corner works as expected. By the way, this bug makes it difficult to use the effects using the corners, because you need to move the cursor toward the corner again and again until the effect stays "on".
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Adding the x11-only keyword
*** Bug 506882 has been marked as a duplicate of this bug. ***
I am affected by the same bug. It only occurs in multi-screen configurations. For example, if I start with the external monitor switched on and the integrated monitor switched off. Restarting kwin_x11 the problem disappears, but if I reactivate the internal monitor, it reappears.
I did a little debugging, this is what I found. Working fine log [canActivate] "19:58:10.700" timeThreshold: 75 reActivationThreshold: 350 lastReset: "null" lastTrigger: "null" now: 32046666000 [canActivate] "19:58:10.716" timeThreshold: 75 reActivationThreshold: 350 lastReset: "32046666000" lastTrigger: "null" now: 32046682000 [canActivate] "19:58:10.733" timeThreshold: 75 reActivationThreshold: 350 lastReset: "32046666000" lastTrigger: "null" now: 32046706000 [canActivate] "19:58:10.750" timeThreshold: 75 reActivationThreshold: 350 lastReset: "32046666000" lastTrigger: "null" now: 32046722000 [canActivate] "19:58:10.767" timeThreshold: 75 reActivationThreshold: 350 lastReset: "32046666000" lastTrigger: "null" now: 32046737000 [canActivate] "19:58:10.783" timeThreshold: 75 reActivationThreshold: 350 lastReset: "32046666000" lastTrigger: "null" now: 32046754000 [canActivate] "19:58:11.621" timeThreshold: 75 reActivationThreshold: 350 lastReset: "null" lastTrigger: "32047122000" now: 32047594000 [canActivate] "19:58:11.621" timeThreshold: 75 reActivationThreshold: 350 lastReset: "32047594000" lastTrigger: "32047122000" now: 32047594000 [canActivate] "19:58:11.632" timeThreshold: 75 reActivationThreshold: 350 lastReset: "32047594000" lastTrigger: "32047122000" now: 32047602000 [canActivate] "19:58:11.650" timeThreshold: 75 reActivationThreshold: 350 lastReset: "32047594000" lastTrigger: "32047122000" now: 32047617000 [canActivate] "19:58:11.666" timeThreshold: 75 reActivationThreshold: 350 lastReset: "32047594000" lastTrigger: "32047122000" now: 32047634000 [canActivate] "19:58:11.683" timeThreshold: 75 reActivationThreshold: 350 lastReset: "32047594000" lastTrigger: "32047122000" now: 32047649000 [canActivate] "19:58:11.700" timeThreshold: 75 reActivationThreshold: 350 lastReset: "32047594000" lastTrigger: "32047122000" now: 32047666000 [canActivate] "19:58:11.717" timeThreshold: 75 reActivationThreshold: 350 lastReset: "32047594000" lastTrigger: "32047122000" now: 32047690000 [canActivate] "19:58:12.550" timeThreshold: 75 reActivationThreshold: 350 lastReset: "null" lastTrigger: "32047873000" now: 32048522000 [canActivate] "19:58:12.550" timeThreshold: 75 reActivationThreshold: 350 lastReset: "32048522000" lastTrigger: "32047873000" now: 32048523000 [canActivate] "19:58:12.566" timeThreshold: 75 reActivationThreshold: 350 lastReset: "32048522000" lastTrigger: "32047873000" now: 32048538000 [canActivate] "19:58:12.583" timeThreshold: 75 reActivationThreshold: 350 lastReset: "32048522000" lastTrigger: "32047873000" now: 32048554000 [canActivate] "19:58:12.600" timeThreshold: 75 reActivationThreshold: 350 lastReset: "32048522000" lastTrigger: "32047873000" now: 32048570000 [canActivate] "19:58:12.617" timeThreshold: 75 reActivationThreshold: 350 lastReset: "32048522000" lastTrigger: "32047873000" now: 32048586000 [canActivate] "19:58:12.633" timeThreshold: 75 reActivationThreshold: 350 lastReset: "32048522000" lastTrigger: "32047873000" now: 32048602000 [canActivate] "19:58:13.600" timeThreshold: 75 reActivationThreshold: 350 lastReset: "null" lastTrigger: "32048786000" now: 32049570000 [canActivate] "19:58:13.617" timeThreshold: 75 reActivationThreshold: 350 lastReset: "32049570000" lastTrigger: "32048786000" now: 32049586000 [canActivate] "19:58:13.633" timeThreshold: 75 reActivationThreshold: 350 lastReset: "32049570000" lastTrigger: "32048786000" now: 32049601000 [canActivate] "19:58:13.650" timeThreshold: 75 reActivationThreshold: 350 lastReset: "32049570000" lastTrigger: "32048786000" now: 32049618000 [canActivate] "19:58:13.666" timeThreshold: 75 reActivationThreshold: 350 lastReset: "32049570000" lastTrigger: "32048786000" now: 32049633000 [canActivate] "19:58:13.683" timeThreshold: 75 reActivationThreshold: 350 lastReset: "32049570000" lastTrigger: "32048786000" now: 32049650000 Bugged behavior log [canActivate] "19:58:28.973" timeThreshold: 75 reActivationThreshold: 350 lastReset: "null" lastTrigger: "null" now: 32064946000 [canActivate] "19:58:28.981" timeThreshold: 75 reActivationThreshold: 350 lastReset: "32064946000" lastTrigger: "null" now: 32064954000 [canActivate] "19:58:28.988" timeThreshold: 75 reActivationThreshold: 350 lastReset: "32064946000" lastTrigger: "null" now: 32064961000 [canActivate] "19:58:28.998" timeThreshold: 75 reActivationThreshold: 350 lastReset: "32064946000" lastTrigger: "null" now: 32064969000 [canActivate] "19:58:29.004" timeThreshold: 75 reActivationThreshold: 350 lastReset: "32064946000" lastTrigger: "null" now: 32064978000 [canActivate] "19:58:29.016" timeThreshold: 75 reActivationThreshold: 350 lastReset: "32064946000" lastTrigger: "null" now: 32064986000 [canActivate] "19:58:29.020" timeThreshold: 75 reActivationThreshold: 350 lastReset: "32064946000" lastTrigger: "null" now: 32064993000 [canActivate] "19:58:29.032" timeThreshold: 75 reActivationThreshold: 350 lastReset: "32064946000" lastTrigger: "null" now: 32065002000 [canActivate] "19:58:29.036" timeThreshold: 75 reActivationThreshold: 350 lastReset: "32064946000" lastTrigger: "null" now: 32065010000 [canActivate] "19:58:29.048" timeThreshold: 75 reActivationThreshold: 350 lastReset: "32064946000" lastTrigger: "null" now: 32065018000 [canActivate] "19:58:29.052" timeThreshold: 75 reActivationThreshold: 350 lastReset: "32064946000" lastTrigger: "null" now: 32065025000 [canActivate] "19:58:29.132" timeThreshold: 75 reActivationThreshold: 350 lastReset: "null" lastTrigger: "null" now: 32065097000 [canActivate] "19:58:29.132" timeThreshold: 75 reActivationThreshold: 350 lastReset: "32065097000" lastTrigger: "null" now: 32065105000 [canActivate] "19:58:29.167" timeThreshold: 75 reActivationThreshold: 350 lastReset: "32065097000" lastTrigger: "null" now: 32065138000 [canActivate] "19:58:29.182" timeThreshold: 75 reActivationThreshold: 350 lastReset: "32065097000" lastTrigger: "null" now: 32065153000 [canActivate] "19:58:29.198" timeThreshold: 75 reActivationThreshold: 350 lastReset: "32065097000" lastTrigger: "null" now: 32065170000 [canActivate] "19:58:29.215" timeThreshold: 75 reActivationThreshold: 350 lastReset: "32065097000" lastTrigger: "null" now: 32065185000 [canActivate] "19:58:29.684" timeThreshold: 75 reActivationThreshold: 350 lastReset: "null" lastTrigger: "null" now: 32065657000 [canActivate] "19:58:29.698" timeThreshold: 75 reActivationThreshold: 350 lastReset: "32065657000" lastTrigger: "null" now: 32065665000 [canActivate] "19:58:29.700" timeThreshold: 75 reActivationThreshold: 350 lastReset: "32065657000" lastTrigger: "null" now: 32065674000 [canActivate] "19:58:29.708" timeThreshold: 75 reActivationThreshold: 350 lastReset: "32065657000" lastTrigger: "null" now: 32065681000 [canActivate] "19:58:29.717" timeThreshold: 75 reActivationThreshold: 350 lastReset: "32065657000" lastTrigger: "null" now: 32065689000 [canActivate] "19:58:29.724" timeThreshold: 75 reActivationThreshold: 350 lastReset: "32065657000" lastTrigger: "null" now: 32065697000 [canActivate] "19:58:29.732" timeThreshold: 75 reActivationThreshold: 350 lastReset: "32065657000" lastTrigger: "null" now: 32065706000 [canActivate] "19:58:29.740" timeThreshold: 75 reActivationThreshold: 350 lastReset: "32065657000" lastTrigger: "null" now: 32065713000 [canActivate] "19:58:29.749" timeThreshold: 75 reActivationThreshold: 350 lastReset: "32065657000" lastTrigger: "null" now: 32065722000 [canActivate] "19:58:29.756" timeThreshold: 75 reActivationThreshold: 350 lastReset: "32065657000" lastTrigger: "null" now: 32065729000 [canActivate] "19:58:29.765" timeThreshold: 75 reActivationThreshold: 350 lastReset: "32065657000" lastTrigger: "null" now: 32065737000 [canActivate] "19:58:29.796" timeThreshold: 75 reActivationThreshold: 350 lastReset: "null" lastTrigger: "null" now: 32065769000 So "lastTrigger" is always null. I can propose a patch shortly.
Created attachment 183442 [details] Fix screenedge reactivation Please see the attached patch. it forces m_lastTrigger init on edges we have created in ScreenEdges::recreateEdges() Tested on kwin-x11 6.4.3 Best!
A possibly relevant merge request was started @ https://invent.kde.org/plasma/kwin-x11/-/merge_requests/55
A possibly relevant merge request was started @ https://invent.kde.org/plasma/kwin-x11/-/merge_requests/57
On my PC, looks like this: https://codereview.qt-project.org/c/qt/qtbase/+/663811 resolve (also) this bug.
This was apparently fixed in Qt with https://codereview.qt-project.org/c/qt/qtbase/+/663811.