Hello, I am running into an issue with my USB UPS. The symptoms are exactly the same as the ones described by this user: http://comments.gmane.org/gmane.comp.monitoring.nut.user/8888 I'll still describe what I experience: my UPS stops responding periodically (as in approximately once or twice a day but it seems to vary a lot). Running upsc returns "Error: Data stale" The kernel logs contain the following lines: [686576.884561] ohci-pci 0000:00:13.0: frame counter not updating; disabled [686576.884564] ohci-pci 0000:00:13.0: HC died; cleaning up [686576.884611] usb 5-2: USB disconnect, device number 2 Unplugging and plugging the UPS again does nothing. I managed to get it working again by unbinding and binding it: echo 0000:00:13.0 | tee /sys/bus/pci/drivers/ohci-pci/unbind /sys/bus/pci/drivers/ohci-pci/bind Nut's developer seems to think that this might be a kernel issue so I thought I would ask for advice here. The UPS is the only device connected to the bus: $ lsusb -s 05: Bus 005 Device 002: ID 0463:ffff MGE UPS Systems UPS Bus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub I am running an x86_64 3.19.0-aufs kernel on an AMD FX(tm)-8320, nut 2.7.2, libusb 1.0.19 and libusb-compat 0.1.5 (I don't know which of the two is actually used). I attached my kernel config, let me know if you need anything else. Regards, Louis PS: please CC me, I'm not subscribed
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