Scanning in Ubuntu with the Canon MF3010
After the [debacle](/journal/printing-ubuntu-canon-mf3010) of setting up the Canon MF-3010 to print in 64-bit Lubuntu 13.10, it's not a surprise that setting up scanning is also a pain in the neck.
After installing the `sane-utils` package, the command `sudo sane-find-scanner` wouldn't find any USB printers. I looked at `man sane-pixma`, the backend driver responsible for interfacing with the Canon MF3010, but it didn't list my printer model. However, on the [official man page](http://www.sane-project.org/man/sane-pixma.5.html), the model is listed. Clearly, my version of `sane-pixma` was out of date.
I tried in vain to update `sane-pixma` via some package in the package manager; e.g. updating the `sane` package didn't help (it made me install `gimp`, claiming it depended on it — huh?). Eventually I came across a page describing [how to build and install `sane-backend` from source](http://mp610.blogspot.com/2008/04/give-your-scanner-new-freshly-sane.html). After following the instructions on that page, `sudo sane-find-scanner` found my scanner. However, `sudo scanimage -L` still claimed it couldn't find any USB devices. The build steps which I followed were:
$ sudo apt-get install libusb-dev
$ git clone git://git.debian.org/sane/sane-backends.git
$ cd sane-backends/
$ ./configure --prefix=/usr --sysconfdir=/etc --localstatedir=/var
$ sudo make install
`scanimage -V` showed two separate versions, one reflecting the thing I had just compiled from source (I believe the version was `1.0.25git`) and the other reflecting the version that was installed earlier (`1.0.23`). By chance, I came upon [this forum post](http://ubuntuforums.org/showthread.php?t=2177594) which suggested putting some easily-accessible `libsane` files out of reach of `scanimage`:
$ cd /usr/lib/x86_64-linux-gnu
$ sudo mkdir old
$ sudo mv libsane.* old
Afterwards, `scanimage -V` showed both versions as `1.0.25`, `sudo scanimage -L` found my device, and Lubuntu's prepackaged `simple-scan` worked (when run as root).