Tripplite USB locks on access after reset

[sdgathman]

While upsreset is able to keep the tripplite talking in normal operation, it would lock up on reboot, and upsreset -r seems to not help. Finally, after resetting and restarting NUT many times, it would work.

I figured out what is happening. After resetting the USB port, attempting to access the port too soon after reset locks the port up again. I added a sleep 10 to upsreset -r, and that is enough time to let the reset work. I can probably reduce the time the UPS port power is keept off. So, I need to run upsreset -r at boot time before starting nut.

This also explains why very rarely, upsreset would fail to fix the ups. If the next access from usbhid-ups is too soon, it locks up.