You can get rid of the 'one processor' arror like so:
boot: knoppix nosmp
I'm having a hard time visualizing a 'torn' screen but perhaps you should boot with a cheat code for your particular video card and chipset.
I installed knoppix 3.3. The boot screen came up with an error message
only one processer found. After boot screen knoppix page is torn. What is wrong. Monitor works fine in windows. Never had trouble with monitor.
You can get rid of the 'one processor' arror like so:
boot: knoppix nosmp
I'm having a hard time visualizing a 'torn' screen but perhaps you should boot with a cheat code for your particular video card and chipset.
Thanks cheat codes solved monitor problem. How do i start my modem?

OWC Mercury Elite Pro 2 Bay RAID Enclosure with USB 3.2 for Dual 3.5 inch HDDs
$87.99
Broadcom 9600-24i Tri-Mode RAID Controller 4.0 NVMe SAS SATA NEW 05-50111-01003
$639.69
Intel VROC Premium RAID Controller Card PCIe Add-On Module VROCPREMMOD
$265.00
CalDigit VR minin 2 Portable Raid Storage On The Go
$75.00
2-Bay/4-Bay Hard Drive Enclosure for 3.5"/2.5'' SATA HDD/SSD 10Gbps USB-C 3.2
$119.99
WAVLINK RAID 2 Bay Hard Drive Docking Station SATA 2.5/3.5'' SSD HDD Enclosure
$119.99
Dell PowerEdge HBA330 LP PCI-E 12GBs RAID SAS Controller Adapter J7TNV
$18.95
Acasis USB 3.2 2 Bay HDD RAID Enclosure for 2.5/3.5" SATA Drives External Array
$55.00
Intel® Integrated RAID Mezzanine Module RMS3HC080 SAS/SATA H24093-204
$24.97
Broadcom MegaRAID 9461-16i SAS/SATA/NVME Tri-Mode PCIe RAID Controller
$295.00