Brother MFC errors

[Tommy Trussell]

On Fri, Jul 17, 2009 at 9:07 AM, Keith Clark<keithclark at k-wbookworm.com> wrote:
> On Fri, 2009-07-17 at 08:53 -0500, Tommy Trussell wrote:
>> On Thu, Jul 16, 2009 at 4:40 PM, Keith Clark<keithclark at k-wbookworm.com> wrote:
>> > On Thu, 2009-07-16 at 16:02 -0500, Tommy Trussell wrote:
>> >> Also I believe there was an update to DBUS the other day -- have you
>> >> installed the Ubuntu updates in the past week? You may have run into a
>> >> bug in the DBUS rules -- someone may have accidentally identified the
>> >> Brother MFC scanner as an HP printer or something like that.
>> >>
>> >> Which version of Ubuntu are you running?
>> >>
>> >> I haven't found a DBUS troubleshooting page, but it might be helpful
>> >> to see in more detail what it's doing when it sees your
>> >> scanner/printer.
>> >>
>> >
>> > Ubuntu 9.04 and error is:
>> >
>> > Failed to open device 'brother2:bus2;dev1':Error during device I/O.
>>
>> On my Brother DCP-7020 printer I have a proprietary driver installed
>> to make it visible to SANE (the linux scanner software), whereas there
>> is an open-source driver available that makes the printer work. It
>> doesn't install itself CORRECTLY, but it does work once you know it's
>> there.
>>
>> What model Brother printer do you use, and did you install the Brother
>> driver to make any part of it work, or did it just work when you
>> plugged it in? (I don't believe Ubuntu contains a driver that works
>> for my scanner, though that might have changed with 9.04.)
>>
>> If you use the proprietary driver, I would try removing it and
>> installing the latest version. Also note that the instructions on the
>> Brother site http://solutions.brother.com/linux/en_us/ may have
>> required more than just downloading and installing the package. If you
>> had to edit the dbus files for the version you installed, the recent
>> Ubuntu update probably blew away your changes. A newer version of the
>> Brother driver may eliminate that problem.
>>
>
> I tried updating the latest driver.  It was a .deb and installed on its
> own (more or less).
>
> It still gives the same error though.
>
> It still works under Vista so I know it is not a hardware issue.

yes but did you follow ALL the instructions at the Brother site,
including the Scanner Setting for Normal Users:

http://solutions.brother.com/linux/en_us/instruction_scn1c.html

This is the part that probably got blown away by the update to dbus.

I believe they could have avoided the problem completely with a clever
udev rule specifically for the scanner. They also could have put this
into the .deb, but they apparently haven't learned how.