> In doubt try an older but reliable Mainboard/Hardware/Bios. Modern > Mainboard/Hardware/Bios CAN make difficulties.
Agree and agree. I've had a vaguely similar experience in 2014 with a combination of Debian 7, a "latest and greatest" mobo, a noname PCIe USB3.0 card, a 15m USB extension cable, and five USB webcams. The webcams would randomly start outputting WAY too dark video streams, once in 1-3h. After several weeks of fighting and head-scratching, we've replaced the "latest and greatest" PC with a mini Dell server. The setup was 100% reliable following the switch. One day before the project was delivered, mobo manufacturer releases errata: PCIe bus would randomly drop voltage. BIOS upgrade would have fixed it... I was already happy with the Dell though. K.
