> -----Original Message----- > From: > [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] > .org] On Behalf Of [EMAIL PROTECTED] > Sent: Monday, January 07, 2008 5:21 AM > To: [email protected] > Subject: [Nut-upsuser] Working platform with FreeBSD + USB + > MGE Ellipse(usbhid-ups) > > Hi, > > I've have had some difficulties to run NUT on freebsd, but I > finally managed to have something that work reliably enough. > For those who may be interested, here is what I did. > > Os: FreeBSD 6.2-RELEASE-p7, nut: 2.2.0, libusb: 0.1.12 > > First, I had to patch libusb with the changes submitted by > Nevil Thatcher in the nutups forum in may 2006. Without this > change, nothing works. > (http://lists.alioth.debian.org/pipermail/nut-upsuser/2006-May > /000992.html) > > At this point, I had something that more or less works, but > the USB connection drops occasionaly for some reasons, and > won't recover. I did not trace it enough to see what happens, > but it seems that something occurs in freebsd kernel layers > that bubbles to the reading process as an "IO error" (errno=EIO=5). > > The reason why it does not recover is still somehow obscurs > to me, but I'm pretty much convinced it is related to the way > the libusb layer deal with re-initialization. I'm new to this > library, but it looks like the function usb_init(); (and > friends) is not designed to run more than once in the process > lifetime. > > Instead of "fixing" those parts, which would have taken a lot > of time, I used another approach: I implemented a "respawn" > option for the driver process, which automatically restarts > the process when it exits. I also did a few changes in the > driver code so that it exits whenever a USB connection problem occurs. > > At this point, I have something that works reliably enough. > Using my UPS (MGE ellipse 750), I see about 20 losses of > connection per day, and the system takes between 5 and 10s to recover. > > I did another change which is more cosmetic than anything > else. In order to keep short reconnections silents (in my > logging system), I added a grace period that delays the > COMMBAD event. If the system recovers before this period, no > event is issued. > > - Hervé > > >
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