Just tried running LM 19.1 MATE off of USB flash drive on my little One Netbook One Mix Yoga 2 7" display laptop.
Due to display company uses (guessing meant for a tablet), it boots up in portrait orientation instead of landscape orientation.
I was able to open the Display settings, but the rotation selection drop-down won't open and show other orientations, so, stuck on Normal.
I tried doing 'xrandr -o right' in Terminal, but get error messages:
For what it's worth, I tried Ubuntu MATE and it does allow me to rotate screen and it sticks (ie, after restarting, logging in, it boots to desktop in landscape orientation).X Error of failed request: BadMatch (invalid parameter attributes)
Major Opcode of failed request: 140 (RANDR)
Minor Opcode of failed request: 2 (RRSetScreenConfig)
Serial number of failed request: 14
Current Serial Number in Output Stream: 14
Would really like to use Linux Mint if possible versus using other distros.
Forgot to mention above, that when I had the Display settings window open, it says 'Unknown' on the pinkish rectangle that represents the monitor.
Also, I have a small pinkish rectangle now in the upper left corner of the desktop that says 'Unknown' and 'default' underneath. Don't remember having this rectangle on desktop in other LM setups on other computers.