Problem with video 3.9 Intel 815

[solrac64]

(Fractured english)I use Knoppix 3.7 with mother board Intel 815, P-III, monitor compaq 1024 and work perfectly, but Knoppix 3.9 have video problem . When Ipush "ctrl, alt, +" the problem continue. The iso image is good (fastSumMD5), the burned was good.
I test the same Knoppix 3.9 cd at PC with P-IV and graphic card GForce64 y work very well . That I can do?

[UnderScore]

It sounds like knoppix is doing the best it can at autodetecting the video hardware (perhaps getting it wrong) & then setting a resolution & refresh rate that is beyond the capabilities of the hardware. Try booting knoppix with some Cheat Codes, such as:
knoppix screen=800x600 xvrefresh=60
knoppix screen=640x480 xvrefresh=60

I hope this helps.
James