Typically the catch process for what you experienced is time. If the external monitor blanked because of setting conflict then the confirmation window, which would pop up, would time out after 30 seconds I believe. If you have not confirmed to keep changes then the system would revert to the previous setting. If this did not happen then there may be a bug. Additionally, you should have on your laptop function keys which will cycle monitor settings. Mine is fn+F10 on a Lenovo. The cycle should be laptop, mirror, external, extended in most cases if memory serves.
-- Fred On Tue, May 23, 2017 at 9:57 AM, Ulli Horlacher < [email protected]> wrote: > I have had to reboot my notebook today in my lecture, because of blank > screen. > > What happend? > > I attached an external monitor (projector) and with xfce4-display-settings > I selected this monitor only, instead of mirror mode. The external monitor > was unable to handle my resolution, so it went blank and I was not able to > reselect the internal display, because I saw nothing. > > Is there a hotkey to enable the internel notebook display or to switch the > monitors? > > > > -- > Ullrich Horlacher Server und Virtualisierung > Rechenzentrum TIK > Universitaet Stuttgart E-Mail: [email protected] > Allmandring 30a Tel: ++49-711-68565868 > 70569 Stuttgart (Germany) WWW: http://www.tik.uni-stuttgart.de/ > REF:<[email protected]> > > -- > xubuntu-users mailing list > [email protected] > Modify settings or unsubscribe at: https://lists.ubuntu.com/ > mailman/listinfo/xubuntu-users >
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