Hello,

On Oct 23 19:13 tkilinski wrote (shortened):
> - Suse Linux 10.1, kernel 2.6.16.21-0.25-default
> - IBM NetVista (S/N KDGZ5MF), 1,7 Celeron
> - HP Officejet t65, paralell port (BIOS: I/O 378, IRQ 7, EPP)
>  
> PROBLEM
> I get "No devices found" message
...
> # dmesg
> [...]
> parport0: PC-style at 0x378, irq 1 [PCSPP,TRISTATE,EPP]
> setup_irq: irq handler mismatch
>  [<c0131bb7>] setup_irq+0xd6/0xe9
>  [<d95379e5>] parport_pc_interrupt+0x0/0x2e [parport_pc]
>  [<c0131c39>] request_irq+0x6f/0x8b
>  [<d953777a>] parport_pc_probe_port+0x96e/0xb21 [parport_pc]
>  [<d88742f7>] parport_pc_init+0x211/0x3ef [parport_pc]
>  [<c012afac>] sys_init_module+0x12d6/0x1444
>  [<c010299b>] sysenter_past_esp+0x54/0x79
> parport0: irq 1 in use, resorting to polled operation
> parport0: Printer, Hewlett-Packard OfficeJet T Series
> lp0: using parport0 (polling).

The "irq handler mismatch" and the fallback to "polling" mode
seem to indicate that the problem is your parport setup.

First of all make sure that the IRQ which you use for the parallel
port is not used by any other stuff, see our online documentation
(package suselinux-manual_en)
/usr/share/doc/manual/suselinux-manual_en/manual/sec.drucken.prob.html
Chapter 11. Printer Operation
11.7. Troubleshooting
11.7.3. Parallel Ports

Note that for scanning you may have to use a higher-level
parport mode (some kind of fast bidirectional mode).

There are some bug reports about problems with the parallel port
in our Novell/Suse Bugzilla. A good report to start is
https://bugzilla.novell.com/show_bug.cgi?id=185135
See also the other bug reports which are mentioned there.

Something is fishy with the parallel port stuff in the kernels
since Suse Linux 10.0, see
http://lists.suse.com/archive/suse-linux-e/2005-Nov/1206.html

The current workaround is to experiment with various BIOS settings
and explicite additional settings in /etc/modprobe.conf to find a
setup, which actually works in a particular problematic case.


Kind Regards
Johannes Meixner
-- 
SUSE LINUX Products GmbH, Maxfeldstrasse 5      Mail: [EMAIL PROTECTED]
90409 Nuernberg, Germany                    WWW: http://www.suse.de/

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