We are going to need some more info.
Can you please copy and paste the output of uname -srm
Can you also please attach the output of lspci -vvnn
Finally, please attach the output of xrandr --verbose when the monitor
does not work after booting with it connected and also when it does work
after hotplugging it.
** Changed in: unity (Ubuntu)
Status: New => Incomplete
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https://bugs.launchpad.net/bugs/1284767
Title:
Unity fails to start with a 4K monitor attached
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