Created attachment 68046 [details] Image of my desktop, with activities open. The terminal and Firefox are not in the taskbar. Another application which was hidden is not shown at all. Note also that no activities are shown. Version: unspecified (using Devel) OS: Linux I have been using KDE 4.8B2 from the Kubuntu beta repository. Yesterday an upgrade to the X server came down, and since then, when I log in, the taskbar sometimes doesn't show open applications. It *does* however show entries for open widgets. (Eg, when you try to take a screenshot or if you try to configure the taskbar itself.) Also, if you open the activities manager, no activities are shown. (I have 4 defined, but as shown in the screenshot, nothing shows up.) Restarting plasma-desktop fixes this problem. Given the definitions, this is a NOR bug, but not really - 4.8 cannot be released with this as it renders the desktop unusable (because you can't fish up a closed application window.) Reproducible: Sometimes Steps to Reproduce: This happens sometimes when I log in Actual Results: Applications are not shown in the taskbar Expected Results: They should be shown. I am running KDE 4.8.97 (KDE 4.8 RC2). Some sort of x update came in yesterday: here is the version. The version of X is: ~> X -version X.Org X Server 1.10.4 Release Date: 2011-08-19 X Protocol Version 11, Revision 0 Build Operating System: Linux 2.6.24-29-server x86_64 Ubuntu Current Operating System: Linux gazelle 3.0.0-15-generic #25-Ubuntu SMP Mon Jan 2 17:44:42 UTC 2012 x86_64 Kernel command line: BOOT_IMAGE=/boot/vmlinuz-3.0.0-15-generic root=UUID=f80839c6-dda0-454e-83f6-ca4d895abd3f ro quiet splash vt.handoff=7 Build Date: 19 October 2011 05:21:26AM xorg-server 2:1.10.4-1ubuntu4.2 (For technical support please see http://www.ubuntu.com/support) Current version of pixman: 0.22.2 Before reporting problems, check http://wiki.x.org to make sure that you have the latest version.
I have the same issue with 4.8.0 on my Gentoo ~AMD64. Only difference - killing and restarting plasma-desktop sometimes doesn't work at all, as plasma-desktop gets stuck in: plasma-desktop(4223) KActivities::Consumer::currentActivity: d-bus reply was invalid "" QDBusError("org.freedesktop.DBus.Error.NoReply", "Did not receive a reply. Possible causes include: the remote application did not send a reply, the message bus security policy blocked the reply, the reply timeout expired, or the network connection was broken.")