Also using the wrong (or no) cursor theme won't cause "a semi-opaque white square".
Please try adding:
MUTTER_DEBUG_DISABLE_HW_CURSORS=1
to /etc/environment and reboot.
Also using the wrong (or no) cursor theme won't cause "a semi-opaque white square".
Please try adding:
MUTTER_ DEBUG_DISABLE_ HW_CURSORS= 1
to /etc/environment and reboot.