Hi, > I've got a Dell Latitude E6220 (with "Intel Corporation 2nd Generation > Core Processor Family Integrated Graphics Controller (rev 09)" > according to lspci) running Debian stretch, with the Xfce4 desktop. > After a fresh boot, when I plug an external monitor into its HDMI > port, the internal display flickers for a moment then both screens > show a mirrored image. Originally Xfce4 would automatically start > `xfce4-display-settings -m` in that situation, and I could click to > disable the internal screen etc. Problem is when I hibernate before > unplugging the external monitor, after resume the laptop will neither > show any video to the external screen nor the internal one. I can reproduce this issue with current sid, on a Lenovo Thinkpad T470s (00:02.0 VGA compatible controller: Intel Corporation HD Graphics 620 (rev 02)), with KDE. -nik
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