I upgraded to EMC 2.4.6, and it no longer complains about the parallel port.
Haven't been able to test any further yet, but I think if it gets this far,
it should work OK.

Neil


On Thu, Dec 9, 2010 at 9:56 AM, Neil Baylis <[email protected]> wrote:

> 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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>
>
>
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