Brother MFC errors

[Tommy Trussell]

On Fri, Jul 17, 2009 at 9:34 AM, Keith Clark<keithclark at k-wbookworm.com> wrote:
> On Fri, 2009-07-17 at 09:19 -0500, Tommy Trussell wrote:
>> 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 A newer version of the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.
>>
>
> Tommy:
>
> Spot on!  Fantastic.  I'm back up and running.

I'm going to send an email to Brother suggesting they could make the
following change to their instructions for Ubuntu 9.04. If the user or
package creates a NEW udev file that overrides the existing one it
won't get blown away with udev updates.

(Actually I think they probably should include a SPECIFIC udev rule
that applies ONLY to Brother devices instead of this generic one, but
I don't know udev well enough to advise them. I just tried the
following, and it does work.)

create a NEW file
    lib/udev/rules.d/51-udev-override.rules
    with the following contents:

# Override udev permissions rule as per Brother instructions
# http://solutions.brother.com/linux/en_us/instruction_scn1c.html
#
# libusb device nodes
SUBSYSTEM=="usb", ENV{DEVTYPE}=="usb_device",
NAME="bus/usb/$env{BUSNUM}/$env{DEVNUM}", MODE="0666"