Claude spots a one-byte firmware bug that turned NZXT capture card video green and pink
Fixing an NZXT Signal 4K30 part 2: the green/pink video bug
After repairing a dead NZXT Signal 4K30 capture card, Doug Brown still saw green and pink video from one DVI source. He fed the firmware, a stock ITE IT6805 driver, and debug UART output to Claude, which found a single wrong instruction: the code wrote YUV 4:2:2 instead of RGB for DVI mode. Patching one byte fixed the colors, and he released the firmware patch on GitHub.
The comment correctly says it should be configured for RGB in this case but what it actually does is write 01 to bits 5:4, which means YUV 4:2:2 mode according to the comment at the top.
- TechIsCool
I love reading about these types of firmware "bugs" fixed by AI in a few minutes with the correct context. I recently patched my LG monitor that had a blinking white LED in standby. Why any designer thinks why yes lets blink this 1 second on 2 seconds off when I go to sleep is deranged.
Well now I can sleep easily because of the same style of patch. I also hit the version refusal but found that you just lie to the upgrade tooling that it's newer and then the version number doesn't change after flashing.