I use Linux Mint 18.1 on a PC with (inxi -G output):Graphics:  Card-1: Intel Xeon E3-1200 v2/3rd Gen Core processor Graphics Controller           Card-2: NVIDIA GK106 [GeForce GTX 650 Ti Boost]           Display Server: X.Org 1.18.4 driver: nvidia Resolution: 1920x1080@60.00hz, 1920x1080@60.00hz           GLX Renderer: GeForce GTX 650 Ti BOOST/PCIe/SSE2 GLX Version: 4.5.0 NVIDIA 375.26Now, I do not use the GeForce for display; I do use both outputs of my on-board adapter - the VGA and the DVI. xrandr -q says:$ xrandr -qScreen 0: minimum 8 x 8, current 3840 x 1080, maximum 16384 x 16384DVI-I-0 disconnected (normal left inverted right x axis y axis)HDMI-0 disconnected (normal left inverted right x axis y axis)DP-0 disconnected (normal left inverted right x axis y axis)DVI-D-0 disconnected (normal left inverted right x axis y axis)DP-1 disconnected (normal left inverted right x axis y axis)VGA-1-1 connected 1920x1080+0+0 510mm x 287mm   1920x1080     60.00*+   1280x1024     75.02    60.02     1152x864      75.00     1024x768      75.08    60.00     800x600       75.00    60.32     640x480       75.00    60.00     720x400       70.08  HDMI-1-1 connected primary 1920x1080+1920+0 510mm x 287mm   1920x1080     60.00*+   1280x1024     75.02    60.02     1152x864      75.00     1024x768      75.08    60.00     800x600       75.00    60.32     640x480       75.00    60.00     720x400       70.08  DP-1-1 disconnectedHDMI-1-2 disconnectedDP-1-2 disconnectedI want to rotate my VGA display, yet - it seems I cannot:$ xrandr --output VGA-1-1 --rotate rightxrandr: output VGA-1-1 cannot use rotation right reflection noneWhy does this happen? I read this question (where the nVIDIA card is used for the output and there's a single adapter), and followed the instructions in the answer; particularly, I addedOption    RandRRotation Trueto my /etc/X11/xorg.conf and restarted, but there was no change.Notes:I can't rotate the HDMI either.
Cannot rotate one of my two displays with xrandr
linux mint;xrandr;dual monitor;intel graphics;display settings