I'm running ubuntu 904 and using a SIS chipset video card 'sitecom cn-105'. It's working but I cannot play videos on that monitor. I've tried using mplayer and mira with no luck.

On the Nvidia monitors I can play video. So I'm assuming it's some option I'm missing in my SIS device section. I've tried enabling DRI for that and it didn't help.

Here is my xorg.conf:
Code:
# xorg.conf (X.Org X Window System server configuration file)
#
# This file was generated by dexconf, the Debian X Configuration tool, using
# values from the debconf database.
#
# Edit this file with caution, and see the xorg.conf manual page.
# (Type "man xorg.conf" at the shell prompt.)
#
# This file is automatically updated on xserver-xorg package upgrades *only*
# if it has not been modified since the last upgrade of the xserver-xorg
# package.
#
# If you have edited this file but would like it to be automatically updated
# again, run the following command:
#   sudo dpkg-reconfigure -phigh xserver-xorg
# commented out by update-manager, HAL is now used
#Section "InputDevice"
#	Identifier	"Generic Keyboard"
#	Driver		"kbd"
#	Option		"XkbRules"	"xorg"
#	Option		"XkbModel"	"pc105"
#	Option		"XkbLayout"	"us"
#EndSection
# commented out by update-manager, HAL is now used
#Section "InputDevice"
#	Identifier	"Configured Mouse"
#	Driver		"mouse"
#	Option		"CorePointer"
#EndSection

Section "Device"
	Identifier	"Nvidia[0]"
#	Option "TwinView" "True"
#	Option "TwinViewOrientation" "RightOf"
#	Option "TwinViewXineramaInfoOrder" "DFP"
#	Option "MetaModes" "1600x1024 1280x1024"
	Driver		"nvidia"
	VendorName     	"NVIDIA Corporation"
	BoardName      	"GeForce 9400 GT"
	Screen 		0
	BusID		"PCI:1:0:0
        Option          "RenderAccel"   "true"
        Option          "UseEdidFreqs"  "true"
	Option		"NoLogo"	"True"
EndSection

Section "Device"
	Identifier	"Nvidia[1]"
	Driver		"nvidia"
	VendorName     	"NVIDIA Corporation"
	BoardName	"GeForce 9400 GT"
	Screen 		1
	BusID		"PCI:1:0:0
        Option          "RenderAccel"   "true"
        Option          "UseEdidFreqs"  "true"
	Option		"NoLogo"	"True"
EndSection

Section "Device"
	Identifier "SiS[0]"
	VendorName "SiS" # Value does not matter
	BoardName "SiS" # Value does not matter
	Driver "sisusb"
	#Option "DRI" "true" # This does not help video
EndSection


Section "Monitor"
    # HorizSync source: edid, VertRefresh source: edid
    Identifier     "Nvidia-Monitor[0]"
    VendorName     "Unknown"
    ModelName      "BENQ E2400HD"
    HorizSync       30.0 - 83.0
    VertRefresh     55.0 - 85.0
    Option         "DPMS"
EndSection

Section "Monitor"
    # HorizSync source: edid, VertRefresh source: edid
    Identifier     "Nvidia-Monitor[1]"
    VendorName     "Unknown"
    ModelName      "MEA DV173B"
    HorizSync       30.0 - 82.0
    VertRefresh     50.0 - 75.0
    Option         "DPMS"
EndSection

Section "Monitor"
	Identifier "SiS-Monitor[0]" #SISUSBVGA
	VendorName "Monitor Vendor" # value does not matter
	ModelName "Monitor Model" # value does not matter
	VertRefresh 50-75
	HorizSync 30-90
EndSection


Section "Screen"
	Identifier	"Nvidia-Screen[0]"
	Monitor		"Nvidia-Monitor[0]"
	Device		"Nvidia[0]"
	Option          "TwinView" "0"
	Option          "metamodes" "DFP: nvidia-auto-select +0+0"
	DefaultDepth	24
EndSection

Section "Screen"
	Identifier	"Nvidia-Screen[1]"
	Monitor		"Nvidia-Monitor[1]"
	Device		"Nvidia[1]"
	Option          "TwinView" "0"
	Option          "metamodes" "DFP: nvidia-auto-select +0+0"
	DefaultDepth	24
EndSection

Section "Screen"
	Identifier "SiS-Screen[0]"
	Device "SiS[0]"
	Monitor "SiS-Monitor[0]"
	DefaultDepth 24
	SubSection "Display"
		Depth 16
		Modes "1024x768" "800x600" "640x480"
	EndSubSection
	SubSection "Display"
		Depth 8
		Modes "1024x768" "800x600" "640x480"
	EndSubSection
	SubSection "Display"
		Depth 24
		Modes "1024x768" "800x600" "640x480"
	EndSubSection
EndSection

Section "Module"
    Load           "dbe"
    Load           "extmod"
    Load           "type1"
    Load           "freetype"
    Load           "glx"
EndSection

Section "ServerLayout"
	Identifier	"Default Layout"
	screen 0 "Nvidia-Screen[0]" 
	screen 1 "Nvidia-Screen[1]" LeftOf "Nvidia-Screen[0]"
	screen 2 "SiS-Screen[0]" RightOf "Nvidia-Screen[0]"
EndSection

Section "ServerFlags"
	Option  "Xinerama" "1"
	Option	"DontZap"	"False"
EndSection

Section "DRI"
	Mode 0666
EndSection