Some issues I had last month with ubuntu linux: 1. When I plug my UHD monitor, linux tries to use 4k@60hz, but my video board does not support this, so no video

Some issues I had last month with ubuntu linux: 1. When I plug my UHD monitor, linux tries to use 4k@60hz, but my video board does not support this, so no video signal. 2. tried to use latest intel video drivers, so I had to upgrade first ubuntu 3. after upgrade no more GUI, only text mode 4. solved the GUI issue, no luck with the wrong resolution/refresh rate. 5. using xrandr command line I can set 4k@30hz. 6. using black magic I can set 4k@50kz. 7. a couple of days ago the mouse cursor had disappeared (mouse still working). Random advices from the internet did not work, had to reboot 8. cannot set mouse speed from the system settings, I have to do it from the command line with some visual parsing of xinput commands. This is all I remember now :)