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If all there things check out and you still can’t see the UPS, something is
more seriously wrong than this manual can cover – find expert help. If you
are unable to list USB devices or drivers, you kernel may not be USB-capable
and that needs to be fixed. Please check if your kernel has the three patches
listed in the <apcupsd-source>/examples directory. Each of the files ends
with the name .patch, and at the current writing they are:
linux-2.4.20-killpower.patch
linux-2.4.20-USB-reject.patch
linux-2.6.0-USB-queue-overflow.patch
For example, RedHat 9 and/or pre-2.4.22 kernels are known to need the
linux-2.4.20-USB-reject.patch for APC SmartUPS XL series devices.
There are also a few email files that you can consult in the examples directory
for additional information and details.
Finally, check your Kernel Config. You will find more information about it
at:
Kernel Config.
KNOWN ISSUES WITH BSD USB
The BSD USB driver for apcupsd is BETA software and has some known
issues.
- FreeBSD lockups: Some users have experienced lockups (apcupsd stops
responding) on FreeBSD systems. In at least one case this problem was
worked around by disabling pthreads (—disable-pthreads flag to configure).
The problem seems to be caused by a FreeBSD kernel bug.
- FreeBSD kernel panics if USB cable is unplugged while apcupsd is running.
This is another kernel bug and is most easily worked around by not hot-
unplugging the UPS while apcupsd is running.
PLATFORMS & VERSIONS
The new (beta) FreeBSD USB driver supports FreeBSD, OpenBSD and
NetBSD. (Thanks go to the *BSD developers who kept a nearly identical
interface across all three platforms.)
The driver has been tested with the following platform versions:
FreeBSD-5.3 (Primary development platform)
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