For me, about half the time Plasma notifications in the corner of the screen are shown with half the letters randomly missing. Just blank spaces. For example, see http://qwertty.com/tmp/kde-notifications-missing-letters.png : it was supposed to say “Kopete: Connection trouble with Jabber...” but instead I got “K p : C n c r bl wi h Jabb r ...”. Googling suggests this isn’t limited to Plasma notifications (https://bugs.launchpad.net/ubuntu/+source/kubuntu-meta/+bug/1510959), possibly being a general Qt issue instead, but for me notifications are the only place where the problem occurs. Reproducible: Sometimes
Thanks for the report Can I please ask what's your graphics card and driver?
10de:0de1 VGA compatible controller: NVIDIA Corporation GF108 [GeForce GT 430] (rev a1) nvidia-352-updates 352.63-0ubuntu0.15.10.1
I'm sorry to say that this is somewhat known Qt bug [1][2] in combination with nvidia. There isn't much we can do about it except recommending adding QML_USE_GLYPHCACHE_WORKAROUND=1 into your /etc/profile.d/ OR /etc/environment and rebooting. Also might help if you add a comment to the Qt reports. [1] https://bugreports.qt.io/browse/QTBUG-42386 [2] https://bugreports.qt.io/browse/QTBUG-36976