Nut upsuser - Aug 2008 - Tripplite OmniPlus1000LCD Problem on VIA system

I have two computers running Ubuntu 8.04 with all updates.  One with EHCI and 
OHCI host controllers recognizes my Tripplite OmniPlus1000LCD UPS, but the 
other (VIA chipset) with EHCI and UHCI does not.  When I compiled the kernel 
with USB debugging enabled, I could see that the handoff from EHCI to the low 
speed UHCI controller was failing leading to endless looping as the EHCI was 
repeated retried.

Should the difference between OCHI and UHCI really matter in this case?  I 
thought both supported USB 1.0 and USB 1.1 protocols, but I am quite fuzzy on 
such matters.

I have compiled and installed the newer 2.2.1-2 nut usbhid-ups driver, but 
this problem prevents me from even getting the OmniPlus1000LCD registered by 
the USB low level drivers.  lsusb does not show it.

Any ideas?

On Sun, Aug 10, 2008 at 4:51 AM, Craig Van Degrift
<craig at yosemitefoothills.com> wrote:
> I have two computers running Ubuntu 8.04 with all updates.  One with EHCI
and
> OHCI host controllers recognizes my Tripplite OmniPlus1000LCD UPS, but the
> other (VIA chipset) with EHCI and UHCI does not.  When I compiled the
kernel
> with USB debugging enabled, I could see that the handoff from EHCI to the
low
> speed UHCI controller was failing leading to endless looping as the EHCI
was
> repeated retried.
>
> Should the difference between OCHI and UHCI really matter in this case?  I
> thought both supported USB 1.0 and USB 1.1 protocols, but I am quite fuzzy
on
> such matters.
>
> I have compiled and installed the newer 2.2.1-2 nut usbhid-ups driver, but
> this problem prevents me from even getting the OmniPlus1000LCD registered
by
> the USB low level drivers.  lsusb does not show it.
If lsusb doesn't see the device (possibly run as root to avoid
permission problems), then it does sound like a lower-level issue.

OHCI and UHCI both support USB 1.0 and 1.1.

It could be that the VIA board is not routing interrupts correctly. Do
you see any UHCI activity in /proc/interrupts? Do other USB 1.1
devices work on that particular port? There are a few debug options
that can be passed to the kernel that will use other means to
configure the interrupt routing.

It sounds like a question that might be better answered on a generic
Linux USB mailing list or an Ubuntu forum, though.

-- 
- Charles Lepple