[vox-tech] postscript printer problem

[Peter Jay Salzman]

begin Henry House <hajhouse@houseag.com> 
> On Mon, May 06, 2002 at 01:16:35PM -0700, Mark K. Kim wrote:
> > On Mon, 6 May 2002, Henry House wrote:
> 
> The Linux box that uses the printer has been up for months. But the lp
> drivers are modules; perhaps that has something do do with it? I tried to
> rmmod lp and rmmod segfaulted. It refuses to unload parport_pc (device or
> resource busy). Here is the output of lsmod:
> 
> 	Module                  Size  Used by    Not tainted
> 	nls_iso8859-1           2880   0  (autoclean)
> 	isofs                  17376   0  (autoclean)
> 	loop                    8624   0  (autoclean)
> 	ide-probe-mod           7728   0  (autoclean)
> 	ide-mod                63528   0  (autoclean) [ide-probe-mod]
> 	soundcore               3908   0  (autoclean)
> 	appletalk              22828   0  (autoclean)
> 	nls_cp437               4384   0  (autoclean)
> 	vfat                    9372   0  (autoclean)
> 	fat                    30008   0  (autoclean) [vfat]
> 	floppy                 45952   0  (autoclean)
> 	nfsd                   65600  32  (autoclean)
> 	lockd                  47168   1  (autoclean) [nfsd]
> 	sunrpc                 63764   1  (autoclean) [nfsd lockd]
> 	parport_pc             25320   1  (autoclean)
> 	lp                         0   0  (deleted)
> 	parport                25888   1  (autoclean) [parport_pc lp]
> 	af_packet               9288   1  (autoclean)
> 	serial                 45504   1  (autoclean)
> 	unix                   15620 122  (autoclean)
> 
> Disturbing.
 
not really.  if another user space program accesses the printer device
file, the module will fail to unload.   try "fuser /dev/lp0".

however, the SEGFAULT is troubling.  you may want to up the kernel.

pete