To use text-to-speech services at login time, for example, to start Gnopernicus in speech mode, the GDM user must be a member of the audio group. To confirm group membership, check the file /etc/group.
To enable the Accessible Login feature to use alternative pointing devices
and switch devices such as sip-and-puff switches, wheelchair-mounted switches,
or trackballs, you might need to modify your X server system configuration
to recognize these devices. You can use most devices that emulate mouse buttons
with the Accessible Login feature and GOK, including
USB single switches and mouse-like pointing devices.
In the Java Desktop System Release 3, the GDM user has a readable home directory. If this setting is removed for security reasons, Gnopernicus will not function properly during Accessible Login.
You should not configure an alternative input device to control the primary onscreen pointer. This might result in undesirable behavior or cause situations from which the user of the alternate input device cannot recover without using the primary keyboard or mouse.