The plasma panel appears to be frozen: the task manager does not update to track closed or new applications, the clock does not tick, etc. However, it responds as expected: the task manager shows overlays on hovering, clicking selects the window; the clock shows the calendar, etc. All panel plasmoids that I use and which should show real-time updates seem to be affected: virtual desktop selector, task manager, system tray, digital clock. Reproducible: Always Steps to Reproduce: 1. Boot the system. Actual Results: The panel components are visually frozen. Expected Results: The panel components update when needed. Desktop widgets seem to work correctly. As far as I can tell, the problem appeared when I updated to 15.10, but I was a few weeks late on updates with 15.04.
Created attachment 95174 [details] Screenshot of the problem This screenshot shows: - the task manager showing outdated information (chromium is no longer running) - the clock is frozen on 22:23 (and it is sunday 22:23, the screenshot was taken on tuesday) - the other clock plasmoid on my desktop works fine
Created attachment 95175 [details] Screenshot of the problem This one was taken just after rebooting: - the clock is already frozen - the task manager does not show the 3 konsole windows - it does show a thumbnail of one of the windows - the system tray does not move (for example the wifi "connecting" icon is not spinning) There are two "sound options" icons, one is actually skype. I do not think that this is related to the current bug: as far as I remember I have already seen it before.
After running `apt-get upgrade` today, the problem does not seem to appear anymore.
thanks for reporting back, it was probably fixed by another bug report.
This problem appeared after the recent update. Firstly to experience the problem you need to switch OFF auto-hide on the panel. If Auto-hide is enabled then you won't see the problem. So you first become aware of it because clicking on running tasks in the task manager maximises or minimises the wrong tasks. You then realise that the clock time is frozen and not updating. You can click on items in the task manager but it's as if the task bar is not being updated. Enabling auto-hide refreshes the task bar and clock. Switching auto hide OFF again and the task bar then doesn't get updated eventually. You need to open multiple applications to see the effect.
do you have an nvidia card? Did you just play a fullscreen game/video / toggle compositing?
(In reply to David Edmundson from comment #6) > do you have an nvidia card? Did you just play a fullscreen game/video / > toggle compositing? Yes, Nvidia GeForce GTX 570M running the Nvidia driver 384.111. No, I never play any games on this machine. I had 4 instances of Dolphin open, kdevelop, Filezilla, Gimp, kmail, maybe Discovery. I've since rebooted and switched the panel to always visible to see if I can get the problem back again.
(In reply to David Edmundson from comment #6) > do you have an nvidia card? Did you just play a fullscreen game/video / > toggle compositing? I forgot to mention, I'm running the latest KDE Neon Plasma 5.12.2 Frameworks 5.43.0 QT 5.9.3 Kernel 4.13.0-36-generic I7-2670QM (16GB)
Even though there's no gaming involved it's still almost certainly the linked report. Compositing could have reset for some other external reason. We can always reopen if we get more information. *** This bug has been marked as a duplicate of bug 353983 ***
After using KDE neon for an hour with the following programs open, kdevelop, Chrome, Skype, Dolphin ) The task panel has stopped rendering. I had the clock show seconds and it's now frozen. If you mouse over the task manager the adjacent programs info pops up but not the programs info that you are actually mousing over. The desktop plasma widgets have stopped updating. So it's not just the panel that stops updating it's the whole desktop... however the applications themselves work normally.. clicking on panel items appears to work, but possibly you don't get what you expect, it's just the rendering that's frozen. I can put together a video if it's unclear as to what I'm taking about. Never had this problem prior to the recent upgrade to KDE 5.12.2.
(In reply to David Edmundson from comment #9) > Even though there's no gaming involved it's still almost certainly the > linked report. Compositing could have reset for some other external reason. > > We can always reopen if we get more information. > > *** This bug has been marked as a duplicate of bug 353983 *** I'm not convinced it's the same issue, compositing appears to be working fine, I'm using Docky in 3D and even though plasma has stopped rendering Docky is displaying perfectly, Docky normally drops back to 2D mode and complains when compositing fails. Also the fancy 3D shadowing on application dialog boxes and windows is still working, with compositing having dropped out I would have expected that to all be gone. It's just the panel and plasma widgets that have stopped rendering.
(In reply to Nick from comment #11) > (In reply to David Edmundson from comment #9) > > Even though there's no gaming involved it's still almost certainly the > > linked report. Compositing could have reset for some other external reason. > > > > We can always reopen if we get more information. > > > > *** This bug has been marked as a duplicate of bug 353983 *** > > I'm not convinced it's the same issue, compositing appears to be working > fine, I'm using Docky in 3D and even though plasma has stopped rendering > Docky is displaying perfectly, Docky normally drops back to 2D mode and > complains when compositing fails. Also the fancy 3D shadowing on application > dialog boxes and windows is still working, with compositing having dropped > out I would have expected that to all be gone. It's just the panel and > plasma widgets that have stopped rendering. Auto hide panel then makes the panel render properly again but it doesn't make the plasma widgets start updating again.
I've disabled docky to see if that's triggering the problem.
(In reply to Nick from comment #13) > I've disabled docky to see if that's triggering the problem. Yep, no further problems since uninstalling Docky. I guess it was a conflict between Docky and KDE/Plasma.