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SubjectRe: lpr to HP laserjet stalls
Tim Waugh wrote:
>
> On Mon, Sep 03, 2001 at 11:05:29PM +0300, Michael Ben-Gershon wrote:
>
> > It is intermittent, but very frequent. It is difficult to print more
> > than about 10 sheets without it happening sometime.
>
> Take a look at Documentation/parport.txt: see the 'Troubleshooting'
> section.

OK. Here it is:

Sep 3 00:33:28 linux kernel: 0x378: FIFO is 16 bytes
Sep 3 00:33:29 linux kernel: 0x378: writeIntrThreshold is 8
Sep 3 00:33:29 linux kernel: 0x378: readIntrThreshold is 8
Sep 3 00:33:29 linux kernel: parport0: PC-style at 0x378 (0x778)
[PCSPP,TRISTATE,COMPAT,EPP,ECP]
Sep 3 00:33:29 linux kernel: parport0: irq 7 detected
Sep 3 00:33:29 linux kernel: parport0: Printer, Hewlett-Packard HP LaserJet 6P
Sep 3 00:33:29 linux kernel: lp0: using parport0 (polling).

Here are the contents of the parport directory in /proc:

::::::::::::::
/proc/sys/dev/parport/parport0/autoprobe
::::::::::::::
CLASS:PRINTER;
MODEL:HP LaserJet 6P;
MANUFACTURER:Hewlett-Packard;
DESCRIPTION:Hewlett-Packard LaserJet 6P Printer;
COMMAND SET:PJL,MLC,PCLXL,PCL;
::::::::::::::
/proc/sys/dev/parport/parport0/autoprobe0
::::::::::::::
::::::::::::::
/proc/sys/dev/parport/parport0/autoprobe1
::::::::::::::
::::::::::::::
/proc/sys/dev/parport/parport0/autoprobe2
::::::::::::::
::::::::::::::
/proc/sys/dev/parport/parport0/autoprobe3
::::::::::::::
::::::::::::::
/proc/sys/dev/parport/parport0/base-addr
::::::::::::::
888 1912
::::::::::::::
/proc/sys/dev/parport/parport0/devices/lp/timeslice
200
::::::::::::::
/proc/sys/dev/parport/parport0/dma
::::::::::::::
-1
::::::::::::::
/proc/sys/dev/parport/parport0/irq
::::::::::::::
-1
::::::::::::::
/proc/sys/dev/parport/parport0/modes
::::::::::::::
PCSPP,TRISTATE,COMPAT,EPP,ECP
::::::::::::::
/proc/sys/dev/parport/parport0/spintime
::::::::::::::
500

As far as I can see, although IRQ 7 is detected, it is not used, so
I don't see how starting parport with irq=none would help. Could
CONFIG_PARPORT_PC_FIFO actually improve matters in such a situation?

Michael Ben-Gershon
mybg@netvision.net.il
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