Debian & USB2 to SVGA converter

This describes how to configure your X-server (on Debian) to put a second X environment on your USB2 to SVGA converter.

When inserted, you'll see the following output in dmesg:
[  827.048106] usb 5-2: new high speed USB device using ehci_hcd and address 4
[  827.180507] usb 5-2: New USB device found, idVendor=0711, idProduct=0900
[  827.180528] usb 5-2: New USB device strings: Mfr=0, Product=0, SerialNumber=0
[  827.180916] usb 5-2: configuration #1 chosen from 1 choice
[  827.541156] usb 5-2: USB2VGA dongle found at address 4
[  827.541678] usb 5-2: Allocated 8 output buffers
[  827.664733] usb 5-2: 8MB 1 ch/1 r SDR SDRAM, bus width 32
[  828.263926] usbcore: registered new interface driver sisusb

In the output of lsusb you'll see:
Bus 005 Device 004: ID 0711:0900 Magic Control Technology Corp. SVGA Adapter
Then, you need to add the following to /etc/X11/xorg.conf:
Section "Device"
        Identifier "Videocard4"
        Driver "sisusb"
        VendorName "sis"
        BoardName "unknown sis card"
        Option "SWCursor" "on"
        Option "HWCursor" "off"

Section "Screen"
        Identifier "Screen4"
        Device "Videocard4"
        Monitor "Monitor"
        DefaultDepth 16
        SubSection "Display"
                Depth 8
                Modes "1024x768" "800x600" "640x480"
        SubSection "Display"
                Depth 15
                Modes "1024x768" "800x600" "640x480"
        SubSection "Display"
                Depth 16
                Modes "1024x768" "800x600" "640x480"
        SubSection "Display"
                Depth 24
                Modes "1024x768" "800x600" "640x480"

Section "ServerLayout"
        Identifier     "userful.Mxorg.conf"
        Screen  "Default Screen"
        Screen  "Screen4" LeftOf "Default Screen"

        InputDevice     "Generic Keyboard"     "CoreKeyboard"

        InputDevice     "Configured Mouse"        "CorePointer"
then restart your x-server:
host:/etc/X11# /etc/init.d/gdm restart
That's it!

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