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

[Dag N. <da...@ne...>]

> Hi, Dag.
> 
> > 1. Scanning is awfully slow
> We've noticed that scanning is slower on SMP and/or 2.4 than non-SMP 2.2,
> but we don't yet know why.

OK, hope you find out. It is still usable but....

> > 2. Printing worked until I used the ieee12844_print when the
> >    driver froze . It didn't crash the system as when I tested the
> >    hpoj package (version 0.3) last time though. . :-)
> Please look in /var/log/messages.  Do you see messages such as "mlcpp0:
> mlcpp_transmit while TX busy"?  This problem has been reported with 2.2.16
> and not (yet) with other versions, so it's good to know if this is the same
> problem on a different kernel version.

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.

> On the other hand, if you are printing while running another application
> that uses hpoj, such as SANE or xojpanel, then this is a different known
> problem which will be fixed eventually, but for now, the workaround is to
> only run one thing at a 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....

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.
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 ?

> > 3. The scanned colors seem to be very far from the "real" colors
> >     especially green, which is more dark blue than green.
> Which model are you using?  Scanning is not an exact science, and sometimes
> color correction is necessary.  xscanimage, xsane, and GIMP all have various
> mechanisms for color correction.

As said above. the model is a 1150C.
Yep, I figured that from the previous postings on this list, but I thought it
was more a matter of the printing process. (Whish I still have to do something
about)

Dag