Problem with my Canon Lide 25 USB scanner and Sane/XSane
Yesterday I bought a Canon Lide 25 scanner. I had first checked the Sane supported devices database and saw that the support was "good" using the plustek backend.
I have connected the scanner to my laptop and everything seems to be okay.
The output of
Xsane/Kooka apparently seem to think they are doing fine as they show a completely black preview and ask me if I want to save that.
I rune sane version 1.0.18 on a standard Ubuntu Feisty installation with a 2.6.20-16-generic kernel and Gnome 2.18.1.
I hope anybody can help me solve my problem! Thanks in advance!
Hans de Zwart
Answer from the plustek backend maintainer
The plustek backend maintainer, Gerhard Jaeger, has given me the following answer to my problem:
I can't help you - sorry. This is a known problem with the Debian based
(also Ubuntu) Kernels, since they have activated CONFIG_USB_SUSPEND.
This feature is good to save power esp. on a laptop, but is known to
cause trouble with more or less all USB scanners.
One possible fix is to recompile your kernel without that option.
Probably it'll help to start the button daemon, which scans the
scanner buttons and will not allow the device to go to sleep.
Another fix is to upgrade the kernel to a more recent one (>= 2.6.22),
where there is some kind of blacklisting implemented to switch off
the suspend stuff for certain devices.
See also this report:
Esp. message #36
Guess in the reports you'll find some more hints and workarounds.
That just makes it a little easier to solve!
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