Rpi USB check-list
- 1A+ power supply
- low resistance power cable test
- powered USB hub 2 or less
- power Isolated USB cable link
- updated firmware link
- google search part of the bug report link
- bug report:
rm /var/log/kern.log /var/log/kern.log.1 /var/log/kern.log.*.gz shutdown -r now ##make the error happen lsusb -v | grep -iP "Transfer Type.*(Interrupt|Isochronous)" | wc -l cat /var/log/kern.log | grep -iP "fail|warn|error" | perl -p -e 's/^[^\]\n]*\]//g;s/(warn_alloc_failed: )[0-9]+/$1/g' | sort -u; dmesg