RE: [hpoj-devel] 2.2.18 + hpoj0.6 + patch + SMP

[PASCHAL,DAVID (HP-Roseville,ex1) <dav...@hp...>]

Dag Nygren wrote:
> No message at all - well not completely true.. I do have a 
> message about
> a failed autoload of char-major-99. Didn't find the reason 
> for that though.
Strange.  I don't know what that is, but it could possibly be lp (which
shouldn't be used at the same time anyway).  Type "lsmod" to see what kernel
modules are loaded at the time.

> I don't think I ran anything else, but I will check more 
> carefully later on.
> xojpanel doesn't work with the 1150C I have , so that was not it.
> But SANE migth have still been there....
If SANE was still running, then that could definitely cause a problem.

> Reading the stuff in the 0.6 disti I just noticed that I 
> really shouldn't
> use ieee12844_print but ptal_print instead (?) I will try that.
In 0.6 I wasn't really trying to discourage people from using
ieee12844_print, but I am trying to move more in the direction of
applications such as ptal-print, which use the new PTAL library.  In any
case, ieee12844_print vs ptal-print should make no difference in causing or
preventing a kernel driver lockup.

You could also try the new "ptal-printd" daemon which is now in CVS and will
be in 0.7 (which should be out in a day or two).  Again, it won't prevent
driver lockups, but it makes setting up print queues much easier.

> Am I right assuming that the fact that scanning works means that
> irq and dma from/to the port works ? Cat'ing /proc/dma doesn't include
> the DMA channel I am using ?
All of the parallel port signalling is handled by software polling.
Interrupts and DMA are not used.

David