Problem with USB ulpt0 and CUPS

Mikko Työläjärvi mbsd at
Fri Jun 20 22:17:24 PDT 2003

On Wed, 18 Jun 2003, Thomas T. Veldhouse wrote:

> I posted this in April and received no response.  However, this has been an
> ongoing issue since at least 2001 (where I found the first reference to this
> trouble via Google).
> The problem seems to be that the FreeBSD USB LPT driver (even with no-reset)
> is somehow dropping the first bits of the data stream, causing a page full
> of trash to be printed prior to the actual print job.  I have no verified
> this problem with 5.1-RELEASE as well.

FWIW, I had similar problems with USB printer and 4.7.  Inserting a
sleep(1) between opening the device and the first write proved to be
a sufficient workaround.


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