OK, I answered my own question.
Knoppix: screen=640x480
works.
Thanks anyway.
I put my brand new Knoppix 3.3 CD-R into my old Gateway Pentium II. Everything seemed to be coming up fine until the CRT screen started rolling and wouldn't stop. About the last thing that the CRT displayed before it started rolling was Starting X11, then the CRT clicked, seemed to turn off, and came back on rolling and unreadable. After reading other messages here, I tried:
boot: knoppix lang=us vga=normal
and
boot: knoppix failsafe
both with the same result.
According to the Belarc Advisor, the display is:
STB Velocity 128 (Display Adapter)
Standard VGA 640x480 (Monitor)
The system starts up just fine; what can I do to keep it working???
Thanks for any response.
OK, I answered my own question.
Knoppix: screen=640x480
works.
Thanks anyway.
Also try vga=normal.
But if screen... works, then that's good.
- Ambrose

Intel Xeon E5-2699 V4 2.20GHz 55M 22-CORES LGA2011-3 Server Processor 145W SR2JS
$84.49
NEW HP Z4 G4 Workstation Xeon W-2123 16GB ECC 256GB NVMe NVIDIA T400 750W Win11
$400.00
Dell EMC PowerEdge R440 Xeon silver 4215 2.5GHz 16 GB ram 2x 550W PSU No HDD
$275.00
Dell Precision T5820 950W Workstation 4.00GHz W-2125 No RAM/ GPU/ HDD/ OS
$144.98
Intel Xeon Gold 6230 2.1 GHz Processor - SRF8W
$29.00
Lenovo ThinkStation P520 Intel Xeon W-2123 3.6GHz 900W - NO RAM/ GPU/ HDD/ OS
$189.98
DELL PRECISION 5820 TOWER | INTEL XEON W-2235 3.80GHZ | 512GB | 16GB | NO OS
$299.99
Matched Pair _ Intel Xeon E5-2698 V4 2.2GHz 20-Core Processor CPU LGA2011 SR2JW
$94.99
Intel Xeon Gold 6230R SRGZA 2.10GHz 35.75MB 26-Core LGA3647 Server CPU Processor
$138.00
Intel Xeon Processor E5-2687W V4 SR2NA 3.00GHz Broadwell 160W LGA2011 12-Core
$36.00