Occasionally, the virtual keyboard is not displayed on the login screen. To solve this, restart the X server by pressing Ctrl+Alt+Backspace or press the appropriate key on your Tablet PC (if you use a slate model without integrated keyboard). If the virtual keyboard still does not show, connect an external keyboard to your slate model and log in using the hardware keyboard.
With the xrandr command, you can change the orientation of your display from within a shell. Enter xrandr --help to view the options available. To simultaneously change the orientation of your graphics tablet, the command needs to be modified as described below:
For normal orientation (0° rotation):
xrandr -o 0 && xsetwacom set "Mouse[7]" Rotate 0
For 90° rotation (clockwise, portrait):
xrandr -o 3 && xsetwacom set "Mouse[7]" Rotate 1
For 180° rotation (landscape):
xrandr -o 2 && xsetwacom set "Mouse[7]" Rotate 3
For 270° rotation (counterclockwise, portrait):
xrandr -o 1 && xsetwacom set "Mouse[7]" Rotate 2
Note that the commands above depend on the contents of your /etc/X11/xorg.conf configuration file. If you have configured your device with SaX2 as described in Section 34.2, Configuring Your Tablet Device, the commands should work as they are written. If you have changed the Identifier of the tablet stylus input device in xorg.conf manually, replace "Mouse[7]" with the new Identifier.