On Mon, 2009-11-23 at 22:20 +0100, Wayne and Holly wrote:
> On Monday 23 November 2009 20:24:16 CommandIR Support wrote:
> > On Sat, 2009-11-21 at 12:37 +0100, Wayne and Holly wrote:
> > > Hello,
> > > after two whole days of trying to get my new CommandIR II operating, I
> > > finally stumbled across this paragraph in the support pages:
> > >
> > > Unable to read version request - Is CommandIR busy? Error -110
> > > This error seen in the syslog or from running "lircd --driver=commandir
> > > -n" is usually resolved by plugging the CommandIR II into a powered USB
> > > hub. Some newer USB chipsets, including some NVIDIA, cause this hardware
> > > level incompatibility.
> > >
> > > This is exactly what I am experiencing, and sadly, I am using a
> > > relatively new NVIDIA chipset. I assume that since the problem is with
> > > the chipset an externally powered USB hub won't solve the problem (I
> > > don't have a powered hub to test with).
> > >
> > > Is this incompatibility likely to be solved soon (or is it even possible
> > > to solve)?
> > Hi Wayne,
> > Sounds like you've probably double checked that the CommandIR really
> > isn't busy (lirc_cmdir / commandir kernel modules aren't loaded & no
> > other lircd processes running before you start the main one).
> > The powered hub solution has worked as a work around for about 99% of
> > people who've seen the issue. Basically, anything besides NVIDIA
> > directly connected to the CommandIR.
> > There isn't a new CommandIR hardware revision in the near future
> > unfortunately, so the USB hub is the currently recommended work around
> > at this time. It's a weird hardware bug, we had NVIDIA chipsets in some
> > of the original dev/test machines which were of course fine.
> > Matthew
> Thanks Matthew,
> you are correct, I have double (and triple) checked that the previously
> required kernel modules aren't loading. I thought I was losing the plot there
> for a while...
> Just to confirm I understand you correctly, I need a USB hub that sources it's
> power externally (as opposed to drawing power from the port it is plugged
> into)? I didn't realise that made a difference (not that I know much about the
> subject). I think I will test the CommandIR on my non-nvidia laptop just to
> be certain I'm not having a 'special moment' before I go out and find a
> suitable hub. Would a PCI card with usb ports suffice or would the problem
> still likely manifest itself?
> Thanks again
A PCI card will probably work too, as long as it's not just connected to
the motherboard's USB headers of course.
Regular USB hubs _can_ solve the problem, but the powered ones seem to
have a higher success rate.
CommandIR Support <commandir@...>