sisusb - SiS USB video driver
is an Xorg driver for SiS (Silicon Integrated Systems) video chips
that are connected via a Net2280-based USB dongle. The driver is not
accelerated, but provides support for colordepths of 8, 16 and 24 bpp as well
as Render and other extensions.
driver supports USB video cards based on the following
The SiS315E/PRO features two CRT controllers. However, in its USB version, only
the first output, referred to as "CRT1", is being used.
Please refer to xorg.conf(5) for general configuration details and to sis(4) for
more information. This manpage only covers a subset of the supported options.
Detailed information on all supported options can be obtained at
Please note that this driver requires a Linux kernel driver as well which is
included in Linux 2.6.12 and later, as well as available at the aforementioned
The following driver Options
- Option "HWCursor"
- Enable or disable the hardware cursor. It is not
recommended to disable the hardware cursor as this will increase the
amount of data transferred over the USB. Default: HWCursor is on.
- Option "SWCursor"
- The opposite of HWCursor. This enables or disables the
software cursor. This sort of cursor is slower because the pointer must be
painted into the graphics display. This increases the amount of data
transferred over the USB significantly. Default: SWCursor is off.
- Option "CRT1Gamma"
- Enable or disable gamma correction. Default: Gamma
correction is on.
- Option "DisconnectTimeout"
- This option determines how the driver will react to a
disconnection of the USB device. If the integer supplied is -1, the driver
will abort the X server immediately upon disconnection. If the value given
is 0, the driver will probe for a re-connection every 2 seconds and in
case the device is detected, re-establish the display. If the value is
greater than 0, the driver will do this re-probing within the given number
of seconds and abort the server if it does not detect the device within
this time-out. Default: 0 (probe forever for device reconnection).
Xorg(1), xorg.conf(5), Xserver(1), X(7), sis(4)
for more information and
Author: Thomas Winischhofer