Re: [Gimp-print-devel] First experiences with an 870

[Michael S. <mi...@ea...>]

Charles Briscoe-Smith wrote:
> ...
> >    2.2.14.  Is USB likely to be faster?  I don't remember what
> >    USB's transfer rate is supposed to be.  The machine has a USB
> >    port, and, IIRC, Linux 2.2.15 does USB.
> >
> > No idea.
> 
> I downloaded the patch for 2.2.15, and it doesn't appear to have any
> USB code in it.  What 2.2.15 does add is I2O support.  Bang goes that
> idea.

The 2.2.x kernels contain a frail and mostly non-functioning USB
driver.  Look on http://www.linux-usb.org for a link to the 2.3.x
backport drivers (patches to the 2.2.x sources for the new 2.3.x
USB drivers...)

I ran into some occasional data glitches with backport drivers from
2.3.20 or so, but haven't had a chance to update my kernel to the
newest version to see if the problem is fixed; I also am using ext3fs,
and its patch doesn't apply well to 2.2.15 right now...

Anyways, IIRC USB can run up to 12Mbits/sec which puts it at least
as fast as the theoretical limit for IEEE-1284 (ECP or EPP mode,
don't remember which)  I haven't noticed any speed difference in
actual print times (printer is slower than the interface...)

-- 
______________________________________________________________________
Michael Sweet, Easy Software Products                  mi...@ea...
Printing Software for UNIX                       http://www.easysw.com