Created attachment 108523 [details] Screenshot Hi, here is what I do that leads to this bug: 1. connect an external VGA projector to my laptop 2. unify outputs 3. disconnect the projector Actual result: a small stripe is missing at the bottom and on the right par of the panel (see screenshot) Expected result: the panel is displayed without missing parts System detail: - Kubuntu 17.10 - Plasma 5.11.1 This bug also occurred with Kubuntu 17.04 and previous Plasma versions.
Created attachment 109530 [details] Screenshot of truncated panel I confirm this bug on Opensuse Tumbleweed, KDE Plasma 5.11.4, Frameworks 5.40.0, Qt 5.9.3. The only difference is that no unifying of outputs is needed. I use two external display with docking station and the notebook screen disabled. After disconnecting the external displays sometimes the bottom and right part of the panel is missing. This does not always happen. Issuing kquitapp5 plasmashell && kstart5 plasmashell restores panel. Maybe it is a multiscreen issue.
Is the Compositor disabled during these operations?
Yes I run Plasma with compositing disabled.
The problem still exists with: - Plasma 5.12.2 - KF5 5.43
The problem still exists with: - Plasma 5.12.3 - KF5 5.44 And I confirm that enabling compositing solves the display glitch. Unfortunately disabling compositing does not work (compositing remains enabled).
I just reported bug #396204 that has some similarity with this one.
I am closing this bug since it is now fixed. Thanks!