Live Linux Ok for graphics, Install Linux Leap42.1 fails at VGA 640x430 screen

Computer is old laptop x86x64 Windows Vista to be converted to Linux I have tried OpenSuse Leap42.1, (live sub distro) and install and live ubuntu, Knoppix live and Puppy. All Live distros load successfiuly to a reasonable screen resolution. All Installs fail at minimum VGA xrandr gives only fail VGA screen resolotion . Knoppix, Puppy use Vesa default and give 1286x768 screen. Computer FijutsuSiemens Esprimo Mobile V5535, Framebuffer in hardware by YaST “Framebuffer device 6630” shows displays from 1280x768, 1024x768, 800x600, 643x480. 320x200. Dispay is 771/671 PCIE VGA Display Adapter , SiS. Error on xrandr “failed to get gamma for output” 640x430 only shown as choice. Hardware shows gfx adapter as EGA, VGA ( with BIOS)
Please can anyone advise how to get areasonable screen display in installed OpenSUSE 42.1
Thanks in advance. Eionmac

Apparently you are missing the xf86-video-sis video driver. If the Leap system is already installed and able to boot one way or another, you can boot adding the “nomodeset” option to the boot command line:
when at the boot prompt, press “E”, search for the “linux” line and append “nomodeset”, then press F10 to boot.
Log in, then in a terminal run:


su -
<root password>
zypper in xf86-video-sis

and reboot. You should have now a choice of resolutions supported by your graphic adapter.