rich1.0phorkiehttps://p.cweiske.de/Getting the fingerprint reader of a Thinkpad x240 to work under Ubuntu 14.04Christian Weiske86400900900<!-- embedding all files of https://p.cweiske.de/176 -->
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<div class="markdown"><p><code>lsusb</code> lists the fingerprint reader in the x240 as follows:</p>
<pre><code>Bus 002 Device 003: ID 138a:0017 Validity Sensors, Inc.
</code></pre>
<p>There exists experimental driver support for this in a <a href="https://github.com/abbradar/fprint_vfs5011">fork</a> of <a href="https://github.com/ars3niy/fprint_vfs5011">libfprint for vfs5011 sensors</a>, however you'll need to compile the driver yourself. To get the fingerprint sensor to work for lightdm login, su etc, follow these steps.</p>
<ol>
<li><p>Install <a href="https://launchpad.net/~fingerprint/+archive/ubuntu/fingerprint-gui">fingerprint-gui</a>:</p>
<p><code>sudo add-apt-repository ppa:fingerprint/fingerprint-gui
sudo apt-get update
sudo apt-get install libbsapi policykit-1-fingerprint-gui fingerprint-gui</code></p></li>
<li><p>Get your compilation tools and library dependencies:</p>
<p><code>sudo apt-get install build-essential automake checkinstall shtool libtool libxv-dev libmagick++-dev</code></p></li>
<li><p>Get the sources, compile and install them:</p>
<p><code>git clone https://github.com/abbradar/fprint_vfs5011
cd fprint_vfs5011
./autogen.sh
make
sudo make install</code></p></li>
<li><p>Make sure your user has permissions for accessing the fingerprint sensor device. Create a file <code>/lib/udev/rules.d/40-libfprint0-custom.rules</code> with the following contents:</p>
<p>```</p>
<h1>Device Validity VFS5011</h1>
<p>ATTRS{idVendor}=="138a", ATTRS{idProduct}=="0017", MODE="0664", GROUP="plugdev"
```</p></li>
<li><p>Add your user to the <code>plugdev</code> group:</p>
<p><code>sudo usermod -a -G plugdev <username></code></p></li>
<li><p>Restart udev:</p>
<p><code>sudo service udev restart</code></p></li>
<li><p>Log out of your session and log back in.</p></li>
<li><p>Enroll your fingerprints with <code>fingerprint-gui</code>, verify them, then see if a <code>sudo -s</code> now suddenly asks you for your fingerprint.</p></li>
</ol>
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