LinuxSA Mailing list archives

  From: Brian Marr <sirreg@dove.net.au>
  To  : LinuxSA <linuxsa@linuxsa.org.au>
  Date: Thu, 27 May 1999 20:39:04 +0930

Re: Disappearance of lp1

After a few hiccups my install of RH 6.0 came good. The install
initially stalled on the Virtual File System that had been installed for
VMWare. After a couple of attempts it seemed to resolve this problem. I
am booting into Gnome and Enlightenment. 

However I have lost my printing capability. The Auto detect did not
detect my parallel port. It says nothing detected on
/dev/lp0,/dev/lp1,/dev/lp2. The RH Printool will send a test file to the
spooler but no further. Is there some way of locating this port? Can I
create a link between the spooler and port? Previous install RH 5.2.


 Re problem with LP1.

> 
> Beginning with kernel 2.1.33 (and available as a patch for kernel
> 2.0.30), the lp device is merely a client of the new parport device. The
> addition
> of the parport device corrects a number of the problems that plague the
> old lp device driver - it can share the port with other drivers, it
> dynamically assigns available parallel ports to device numbers rather
> than enforcing a fixed correspondence between I/O addresses and port
> numbers, and so forth.
> 
> The advent of the parport device has enabled a whole flock of new
> parallel-port drivers for things like Zip drives, Backpack CD-ROMs and
> disks, and so forth. Some of these are also available in versions for
> 2.0 kernels; look around on the web.
> 
> The main difference that you will notice, so far as printing goes, is
> that parport-based kernels dynamically assign lp devices to parallel
> ports.
> So what was lp1 under Linux 2.0 may well be lp0 under Linux 2.2. Be sure
> to check this if you upgrade from an lp-driver kernel to a
> parport-driver kernel
> 
> I goes on to say that auto detection may not work !
> 
> Lewis Jones wrote:
> >
> > Hello,
> >         A short while back, I noticed some correspondence concerning a
> > problem where the lp1 port would disappear if parallel port support was
> > included in a kernel; well, I think that's what it was.
> >
> > The solution was to actually communicate with the printer through lp0
> > instead.  I had a similar problem, but could not solve it.
> Snip
> 
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