Video problem w/Diamond Stealth 64 S3

Boot in Recovery Mode (second options in the boot menu).
At the prompt give this command:

dpkg-reconfigure -phigh xserver-xorg

Answer the questions and afterward start the x session with "startx" or "/etc/init.d/gdm star" (without double commas).
If everything goes fine, next time you reboot you will be at the desktop.

PS. It is likely better to use "dpkg-reconfigure xserver-xorg" but you need to answer many more questions, try it if you feel brave.

well i have a similar problem I have tried

dpkg-reconfigure -phigh xserver-xorg

It did something but did not work

I have to run in failsafe low resolution graphics mode.
NOTe The current hardware and BIOS Setting works in Windows XP PRO dual screen extended desktop. 1024 x 768

[ 96.429] (EE) open /dev/fb0: No such file or directory

[ 96.439] (EE) s3(0): Ramdac probe failed
[ 96.439] (II) UnloadModule: "s3"
[ 96.439] (II) Unloading s3
[ 96.439] (II) UnloadModule: "vbe"
[ 96.439] (II) Unloading vbe
[ 96.439] (II) UnloadModule: "int10"
[ 96.439] (II) Unloading int10
[ 96.439] (II) UnloadModule: "vgahw"
[ 96.439] (II) Unloading vgahw
[ 96.439] (EE) Screen(s) found, but none have a usable configuration.
[ 96.439]
Fatal server error:
[ 96.439] no screens found
[ 96.439]

neill@charles1:~$ sudo lspci |grep VGA
[sudo] password for neill:
00:09.0 VGA compatible controller: S3 Inc. 86c968 [Vision 968 VRAM] rev 0
01:00.0 VGA compatible controller: Silicon Integrated Systems [SiS] 661/741/760 PCI/AGP or 662/761Gx PCIE VGA Display Adapter

neill@charles1:~$ lshw -C Video
WARNING: you should run this program as super-user.
  *-display UNCLAIMED
       description: VGA compatible controller
       product: 661/741/760 PCI/AGP or 662/761Gx PCIE VGA Display Adapter
       vendor: Silicon Integrated Systems [SiS]
       physical id: 0
       bus info: pci@0000:01:00.0
       version: 00
       width: 32 bits
       clock: 66MHz
       capabilities: vga_controller cap_list
       configuration: latency=0
       resources: memory:d8000000-dfffffff memory:e9000000-e901ffff ioport:9000(size=128)
  *-display UNCLAIMED
       description: VGA compatible controller
       product: 86c968 [Vision 968 VRAM] rev 0
       vendor: S3 Inc.
       physical id: 9
       bus info: pci@0000:00:09.0
       version: 00
       width: 32 bits
       clock: 33MHz
       capabilities: vga_controller
       configuration: latency=0
       resources: memory:80000000-83ffffff memory:84020000-8402ffff
WARNING: output may be incomplete or inaccurate, you should run this program as super-user.
neill@charles1:~$

do you need more information from me? tell me the command and I post its output!

PS. It is likely better to use "dpkg-reconfigure xserver-xorg" but you need to answer many more questions, try it if you feel brave.

Tried this it ran it did not ask any questions
recovery grub option Ubuntu 11.04 root prompt with networking. Command returned at once.