Windows 7 Pro x64 Tripp-lite SMART1050SLT (USBHID) NUT 2.6.4-5 Driver is malfunctioning if the UPS goes on-battery (quick test or otherwise). usbhid-ups - libusb_get_report: libusb0-dll:err [control_msg] sending control message failed, win error: A device attached to the system is not functioning. (from event log) libusb_get_interrupt: libusb0-dll:err [_usb_reap_async] reaping request failed, win error: A device attached to the system is not functioning. 5D log attached. Disabling and re-enabling the LibUSB entry in device manager will get it back to normal without restarting NUT. Re-plugging the USB cord also works. Windows built-in driver works reliably, but is very limited. Unlike my APC UPS's on Windows 7, this UPS + NUT works just fine through a sleep cycle. -------------- next part -------------- A non-text attachment was scrubbed... Name: usbhid-ups.7z Type: application/octet-stream Size: 11800 bytes Desc: not available URL: <http://lists.alioth.debian.org/pipermail/nut-upsuser/attachments/20130503/c59713d4/attachment.obj>