Can't use 14400x900 resolution with SIS Mirage3

[srbaldomero]

Hello

I'm desperate: I've installed kubuntu 8.04 in my computer, everything seems to work fine but video configuration. Since I am using a 19'' widescreen I'd like to configure it at 1440x900 px but that option is not available. The maximum allowed resolution is 1024x768px, which is a real problem since the proportions are distorted.

I have been reading in forums but I can't find any solution.

This is my configuration:
Monitor Envision 19'' widescreen
Graphic's card: SiS 771/671 Mirage Graphics 256MB/
OS: Kubuntu 8.04
Secondary OS: Windows Vista (works fine with the desired resolution)

I've tried with the basics:

• tick "widescreen" option in monitor configuration -> the new resolutions don't appear or I can't move the slider.
• changing card's drivers: from VESA generic (by default) to SIS generic -> I get an error message which says"(EE) No devices detected."

I have also tried with editing xorg.conf


This is the original xorg.conf (works fine, but the video resolution is not correct)

Section "InputDevice"
	Identifier	"Generic Keyboard"
	Driver		"kbd"
	Option		"XkbRules"	"xorg"
	Option		"XkbModel"	"pc105"
	Option		"XkbLayout"	"es"
EndSection

Section "InputDevice"
	Identifier	"Configured Mouse"
	Driver		"mouse"
	Option		"CorePointer"
EndSection

Section "Device"
	Identifier	"Configured Video Device"
EndSection

Section "Monitor"
	Identifier	"Configured Monitor"
EndSection

Section "Screen"
	Identifier	"Default Screen"
	Monitor		"Configured Monitor"
	Device		"Configured Video Device"
EndSection

Section "ServerLayout"
	Identifier	"Default Layout"
	Screen		"Default Screen"
EndSection

I have also tried to manually edit it, or reconfigure xorg and this is the result:

Section "InputDevice"
	Identifier	"Generic Keyboard"
	Driver		"kbd"
	Option		"XkbRules"	"xorg"
	Option		"XkbModel"	"pc105"
	Option		"XkbLayout"	"es"
EndSection

Section "InputDevice"
	Identifier	"Configured Mouse"
	Driver		"mouse"
	Option		"CorePointer"
EndSection

Section "Device"
	Identifier	"Configured Video Device"
	Boardname	"VESA driver (generic)"
	Busid		"PCI:1:0:0"
	Driver		"vesa"
	Screen	0
EndSection

Section "Monitor"
	Identifier	"Configured Monitor"
	Vendorname	"Generic LCD Display"
	Modelname	"LCD Panel 1440x900"
	Horizsync	31.5-56.0
	Vertrefresh	56.0 - 65.0
 modeline "800x600@56" 36.0 800 824 896 1024 600 601 603 625 +hsync +vsync
 modeline "800x600@60" 40.0 800 840 968 1056 600 601 605 628 +hsync +vsync
 modeline "1280x768@60" 80.14 1280 1344 1480 1680 768 769 772 795 -hsync +vsync
 modeline "1280x720@60" 74.48 1280 1336 1472 1664 720 721 724 746 -hsync +vsync
 modeline "1280x800@60" 83.46 1280 1344 1480 1680 800 801 804 828 -hsync +vsync
 modeline "1440x900@60" 106.47 1440 1520 1672 1904 900 901 904 932 -hsync +vsync
	Gamma	1.0
EndSection

Section "Screen"
	Identifier	"Default Screen"
	Monitor		"Configured Monitor"
	Device		"Configured Video Device"
	Defaultdepth	24
	SubSection "Display"
		Depth	24
		Virtual	1440	900
		Modes		"1440x900@60"	"1280x800@60"	"1280x720@60"	"1280x768@60"	"800x600@60"	"800x600@56"
	EndSubSection
EndSection

Section "ServerLayout"
	Identifier	"Default Layout"
 screen 0 "Default Screen" 0 0
EndSection
Section "Module"
	Load		"glx"
	Load		"GLcore"
	Load		"v4l"
EndSection
Section "ServerFlags"
EndSection

This file does not even allow me to get into kubuntu's graphic interface. I had to start windows and restore original xorg.conf·

Can anyone help me? Thank you!