The mouse cursor in graphics mode doesn't quite work for BIOS video modes 11h (VGA mono)
and 13h (VGA 256-colors) with a mouse grab in a DOSEMU X Window.
The mouse pointer behaves as if there is an artificial clipping zone in the vertical direction:
It's invisible for the most part of the window.. In mode 13h, the pointer is missing pixels as well.
Strangely enough, other video modes work perfectly
The bug can be reproduced with the attached DOS test program (gcursor).
The program needs to be given the video mode in argument (hex) on the cmdline.
Examples: "gcursor 0x11", or "gcursor 0x13".