OK, thanks Jeff. I was off list for a while, so I missed those earlier
discussions. I'll check them out, and see if I can get it sorted.

Neil

On Thu, Dec 9, 2010 at 9:13 AM, Jeff Epler <[email protected]> wrote:

> Yes, the parport stuff has changed between emc2.3 and emc2.4 and there
> are also differences between an 8.04 installation and a 10.04
> installation.
>
> In emc 2.3 and earlier, emc's parport drivers would not cooperate with
> the linux parport drivers, so the linux driver was disabled by default.
>
> In emc 2.4, emc gained the ability to cooperate with linux's parport
> driver.  The anticipated benefit was primarily to make it easy to
> specify pci parports, because you can call them parport 1, 2 and so on
> instead of 0xe800 or a raw port address.  so systems that are initially
> installed with 2.4 leave linux parports enabled ny default (but 2.3 to
> 2.4 upgrades don't, I think)
>
>
> We also hoped for better detection of epp-supporting parports, but this
> has proven to be untrue.  See the long "d510mo" threads for more on
> this.  the "mode 4" message is related to this--linux thinks your port
> is not epp-capable.
>
> in the latest release, 2.4.5, I think the problems working in
> cooperation with linux are solved,  but if not, your final option is to
> disable theb linux parport driver by editing the file
> /etc/modprobe.d/emc2 or emc2.conf and removing a #.  reboot after doing
> this, and linux will get out of the way of emc's use of the parport.
> (of this does turn out to be necessary, let us know--we may be able to
> find a solution, like we did for d510mo)
>
> Jeff
>
>
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