[Nut-upsdev] Getting 'Data stale' error with bcmxcp_usb for a PowerWare 5115 on OSX

[Charles Lepple]

Charlie,

sadly it has taken me all this time just to get my system to a point  
where I could connect to a USB UPS.

I have a Tripp-Lite OMNIVS1000 here, and it advertises itself as a USB  
HID-class device. It is like pulling teeth trying to get the OS X  
kernel to let go of a HID device. From the USB Prober output, I am  
almost certain that your PowerWare device does not have the same  
problem.

If you have time to add some upslogx() calls to the driver, I would be  
interested in comparing the errors you are experiencing when not  
running in debug mode. When the tripplite_usb driver is in the  
background, it logs the following:

3/8/10 11:26:04 PM tripplite_usb[22267] Error reading S value: Device  
detached? (error 0: libusb/darwin.c usb_setup_iterator:  
IOServiceGetMatchingServices: unknown error
)

One option might be to just use one -D flag, and start the driver from  
launchd. Then you can have it respawn when the device is disconnected  
- which I believe the bcmxcp_usb driver does not currently do itself.

-- 
Charles Lepple
clepple at gmail