I had this problem using Kubuntu 16.04 and KDE 5.5.5. A workaround that worked for me was to change the compositor via System Settings, Display and Monitor, Compositor, Rendering backend, set to XRender. I can now turn the TV off and on again without it freezing KDE.
I had this problem using Kubuntu 16.04 and KDE 5.5.5. A workaround that worked for me was to change the compositor via System Settings, Display and Monitor, Compositor, Rendering backend, set to XRender. I can now turn the TV off and on again without it freezing KDE.
This workaround came from the following page: /unix.stackexch ange.com/ questions/ 219073/ how-to- enable- plasma- kde-automatic- restart- upon-freeze
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