USB Printer

Marc Wiz marc at
Sun Apr 6 10:05:26 PDT 2003

On Sun, Apr 06, 2003 at 11:59:02AM -0500, Mike Meyer wrote:
> In <20030406161652.GA4518 at>, Marc Wiz <marc at> typed:
> > Now here comes the interesting part since I figured it would be a
> > good idea to start debugging this with a simple setup (no printer
> > spooler, etc.)  I have tried to do echo "hello there" > /dev/ulpt0
> > and nothing happens.
> > It takes about 30 seconds before the command ends.
> This was interpreted as meaning that this was a winprinter. However...

Right :-)  That's why I did what I did with another OS :-)

> > If I try the echo using Linux the printer works just fine.  I.e. a page is
> > printed with "hello there".
> That's not good. That sounds like it isn't a winprinter, but the
> driver is just not working.

I don't know anything about USB (yet :-) but I wonder why other
USB printers work.

> > The code is compiled into the kernel (not a module)
> > 
> > Any suggestions as to how to proceed?  Are there any driver debug options
> > that can be enabled either for USB or the printer code?
> You can enable USB_DEBUG at kernel build time, then use "gdb -k" to
> set ulptdebug in ulpt.c to positive values - increasing values get you
> increasing levels of debug information.

Thanks!  I will build a new kernel and try that.


Marc Wiz
marc at
Yes, that really is my last name.

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