[sane-devel] Testing on Canon MF6580PL

twain43 at hotmail.com twain43 at hotmail.com
Wed Jul 14 09:13:35 UTC 2010

here are some results, along with the steps I took to obtain them:
1. Uninstalled the canon printer from System Preferences, trashed the drivers and killed the "UFR II Backgrounder" service;
2. Make uninstalled all frontends and backends (I'm keeping the source, just in case);
3. Rebooted;
4. Pulled down yesterday's git snapshot, added the "ugly pixma patch", modded the NDEBUG statements for pixma files;
5. Compiled and installed both frontends and backends;
6. Ran Activity Monitor and kept it on the background;
7. Ran scanimage in Terminal as superuser, while using Activity Monitor to save the list of running processes and daemons at the moment of the test.

Not posting the usual pixma and all-export logs, since they read as 
Instead, I'm attaching Activity Monitor's log: maybe you'll spot something more than I did....AFAICS, there's nothing wrong: the only two suspicious processes are TWAINBridge and Image Capture Extension. The first one appears as soon as I connect the printer to the USB, and can't be killed, so I'm guessing it must be OS-related. I killed the second one and rerun the scantest, but got no different log results.

Hope you can spot something more out of it.


From: twain43 at hotmail.com
To: nicolas0martin at gmail.com
Date: Tue, 13 Jul 2010 14:32:44 +0000
CC: sane-devel at lists.alioth.debian.org
Subject: Re: [sane-devel] Testing on Canon MF6580PL

I'm not a Mac expert myself, but I'll poke around things and see what I can do....


Date: Tue, 13 Jul 2010 10:35:51 +0200
Subject: Re: [sane-devel] Testing on Canon MF6580PL
From: nicolas0martin at gmail.com
To: twain43 at hotmail.com
CC: sane-devel at lists.alioth.debian.org

The "process" here under is probably not an application, but runs in background, it may be a printing daemon or service started after boot, which locks access to the usb port. 
I really know nothing about Mac OS X, to help you find it, maybe stop a printing service would help.

2010/7/13 <twain43 at hotmail.com>

I'm running the command from terminal at system boot, so there really should not be anything else open....is there some way to check this, anyway, so that I might be sure of it?
Thank you for your patience....


Date: Mon, 12 Jul 2010 18:45:03 +0200 

Subject: Re: [sane-devel] Testing on Canon MF6580PL
From: nicolas0martin at gmail.com
To: twain43 at hotmail.com

CC: sane-devel at lists.alioth.debian.org 

Well, not exactly something new, the 2 logs are somehow equivalent, but one gives a little bit more details:[pixma] en1 is not a valid IPv4 interface, skipping...
[pixma] en1 is IPv4 capable, sending broadcast..

[pixma] scanner discovery finished...
[pixma] pixma_open(): Canon imageClass MF6500
[sanei_usb] sanei_usb_open: trying to open device `libusb:005:002-04a9-2686-00-00'
usb_os_open: 04a9:2686
usb_os_open(USBDeviceOpenSeize): another process has device opened for exclusive access

usb_set_configuration: called for config 1
USB error: usb_set_configuration(SetConfiguration): device not opened for exclusive access
[sanei_usb] sanei_usb_open: libusb complained: usb_set_configuration(SetConfiguration): device not opened for exclusive access

usb_os_close: 04a9:2686
[pixma] pixma_connect() failed EINVAL
[pixma] pixma_open() failed EINVAL
[pixma] pixma_close(): Canon imageClass MF6500
scanimage: open of device pixma:04A92686 failed: Invalid argument

And I think we're back to a few messages ago in this thread, so first, could you locate this other process (maybe printer ?) which locks the usb device, and stop it ? 

2010/7/12 <twain43 at hotmail.com>

Ditto: here are the new logs. 
Something new sprouted out, at their very end....hope it's useful. 


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