Have you tried "knoppix xmodule=vesa" at the beginning when you loaded Knoppix?
hello.
I am trying to run knoppix 6.4 on my dell optiplex gx150. I get to the desktop and then the screen goes into sleep mode. The menu bar has no items and I can't move the cursor before the screen flashes a few times and sleeps. I ctrl+alt+F1 and can get to the system terminal. I tried gnome and kde as the desktop enviorments and didn't have any success. My system has 512mb ram and uses intel integrated graphics. Please give any ideas?
Have you tried "knoppix xmodule=vesa" at the beginning when you loaded Knoppix?
I actually tried "knoppix no3d" and that fixed it. I found my 6.7 disk and it seems to fix the problem altogether.

Netac 2TB 1TB 512GB 256GB Internal SSD 2.5inch SATAIII Solid State Drive lot
$379.00
Samsung 2.5" 870 EVO SSD SATA III 250GB 500GB 1TB Internet Solid State Drive Lot
$60.00
Micron MTFDDAK256TBN 256 GB, Internal ,2.5" SSD
$23.00
Samsung New SSD 970 EVO Plus 2TB 1TB 500GB 250GB NVMe M2 Internal Hard Drive Lot
$79.99
Crucial MX500 1TB 2.5" SATA III Internal SSD CT1000MX500SSD1
$99.99
Crucial MX500 250GB 2.5" SATA III SSD - Preowned
$29.00
Samsung 256 GB Internal SATA SSD Fully Tested 50%-79% Health
$24.00
2 PACK 128 GB SSD M.2 2280 SATA Solid State Drive Major Brands, Samsung, LiteON
$28.00
Netac 120GB 256GB 1TB 2TB Internal SSD 2.5'' SATAIII 6Gb/s Solid State Drive lot
$119.99
Netac 256GB SSD 2.5'' SATA III 6Gb/s Internal Solid State Drive 500MB/s PC/Latop
$40.00