I use archlinux 64 bits, since plasma 5.5.1-1 packages I notice a bug : - sometimes the left mouse click is not detected when I click on the plasma taskbar ( or K menu ), for example if firefox is minimized on the taskbar then sometimes a mouse click for restoring the firefox window doesn't work, I have to do this mouse click twice in order to restore the window, this bug doesn't occur with plasma 5.5.0, I can reproduce this bug on my PC ( archlinux 64 bits ) and on a qemu virtual machine i686, this bug occurs randomly ( you have to test at least 10 times in order to trigger the bug, for example 3 windows opened or minimized, then try to click on the taskbar in order to minimize/restore one of these 3 windows, you will notice that sometimes the mouse click is not detected by plasma 5.5.1 ) Reproducible: Sometimes Steps to Reproduce: - update to plasma 5.5.1-1 packages - open 3 programs ( for example : firefox, thunderbird, dolphin ) - sometimes when you want to minimize or restore a window ( firefox, thunderbird, dolphin for example ) the plasma taskbar doesn't detect the left mouse click - this bug doesn't occur with the previous versions of plasma ( for example 5.5.0 ) you need to try at least 10 times because it's a random bug, this bug can also occur if you try to click on the K menu Actual Results: the taskbar sometimes doesn't detect the left mouse click Expected Results: the plasma taskbar should have detected the left mouse click and should minimize/restore the window
I have exactly the same problem since yesterday on two PCs with the last KDE update (Fedora 23), but I have 5.5.0 packages : plasma-desktop-5.5.0-4.fc23.x86_64 kdeplasma-addons-5.5.0-2.fc23.x86_64 plasma-workspace-geolocation-5.5.0-2.fc23.x86_64 plasma-workspace-drkonqi-5.5.0-2.fc23.x86_64 plasma-pa-5.5.0-1.fc23.x86_64 plasma-systemsettings-5.5.0-1.fc23.x86_64 plasma-nm-openconnect-5.5.0-1.fc23.x86_64 plasma-nm-5.5.0-1.fc23.x86_64 plasma-milou-5.5.0-1.fc23.x86_64 plasma-workspace-libs-5.5.0-2.fc23.x86_64 plasma-desktop-doc-5.5.0-4.fc23.noarch plasma-nm-pptp-5.5.0-1.fc23.x86_64 kf5-plasma-5.16.0-4.fc23.x86_64 plasma-breeze-5.5.0-1.fc23.x86_64 plasma-nm-openvpn-5.5.0-1.fc23.x86_64 plasma-pk-updates-0.2-5.fc23.x86_64 plasma-workspace-common-5.5.0-2.fc23.x86_64 plasma-nm-l2tp-5.5.0-1.fc23.x86_64 kde-settings-plasma-23-8.fc23.noarch plasma-nm-vpnc-5.5.0-1.fc23.x86_64 plasma-breeze-common-5.5.0-1.fc23.noarch plasma-nm-openswan-5.5.0-1.fc23.x86_64 plasma-workspace-geolocation-libs-5.5.0-2.fc23.x86_64 plasma-workspace-5.5.0-2.fc23.x86_64
the bug seems to never happen on the active window, we can minimize/maximize from the taskbar without problem. It's a problem when we change the focus : Scenario : Application 1 active : taskbar highlighted Cursor on the taskbar of the minimized application 2 : light highlight Click on the taskbar of the minimized application 2 : the light highlight/focus disappear.
on archlinux this bug seems solved with plasma-workspace 5.5.1-4 package : https://bugs.archlinux.org/task/47399
a patch has been released in order to fix this bug : https://quickgit.kde.org/?p=plasma-workspace.git&a=commitdiff&h=1390b4&o=plain linux distros should apply this patch quickly, for archlinux it's already done with plasma-workspace 5.5.1-4 package version
Thanks !