Sometimes I use VNC to connect to mythboxes, starting mythfrontend from a xterminal to adjust some settings easily. I discovered that, because I set up one of them to use opengl (selected in settings), to draw the screens, the menu’s weren’t visible anymore, causing a lot of message like this:
QGLContext::makeCurrent(): Cannot make invalid context current.
Switching back to “qt” solves this. Another option is running mythfrontend with a commandline option. This overrides the opengl setting for a session:
mythfrontend -O ThemePainter=qt