Comment 27 for bug 1218547

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Surak (smkozasa) wrote : Re: Clevo W350ST brightness keys don't work on Kubuntu

I booted with acpi_backlight=vendor and the Fn+F8 and Fn+F9 keys worked as expected to control the internal laptop screen brightness. But there was a side effect: now, plugin the external VGA does not change to external screen automatically anymore. And after manually changing to the external VGA in KDE and removing the VGA cable does not change back to the internal laptop screen automatically. I hope there is a way to keep Fn brightness keys working and the automatic screen selection, simultaneously.