{"type":"rich","version":"1.0","provider_name":"phorkie","provider_url":"https:\/\/p.cweiske.de\/","title":"Getting the fingerprint reader of a Thinkpad x240 to work under Ubuntu 14.04","author_name":"Christian Weiske","cache_age":86400,"width":900,"height":900,"html":"\n\n
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lsusb<\/code> lists the fingerprint reader in the x240 as follows:<\/p>\n\n

Bus 002 Device 003: ID 138a:0017 Validity Sensors, Inc.\n<\/code><\/pre>\n\n
There exists experimental driver support for this in a fork<\/a> of 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>\n\n
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  1. Install fingerprint-gui<\/a>:<\/p>\n\n
    sudo add-apt-repository ppa:fingerprint\/fingerprint-gui\nsudo apt-get update\nsudo apt-get install libbsapi policykit-1-fingerprint-gui fingerprint-gui<\/code><\/p><\/li>\n
  2. Get your compilation tools and library dependencies:<\/p>\n\n
    sudo apt-get install build-essential automake checkinstall shtool libtool libxv-dev libmagick++-dev<\/code><\/p><\/li>\n
  3. Get the sources, compile and install them:<\/p>\n\n
    git clone https:\/\/github.com\/abbradar\/fprint_vfs5011\ncd fprint_vfs5011\n.\/autogen.sh\nmake\nsudo make install<\/code><\/p><\/li>\n
  4. Make sure your user has permissions for accessing the fingerprint sensor device. Create a file \/lib\/udev\/rules.d\/40-libfprint0-custom.rules<\/code> with the following contents:<\/p>\n\n
    ```<\/p>\n\n
    Device Validity VFS5011<\/h1>\n\n
    ATTRS{idVendor}==\"138a\", ATTRS{idProduct}==\"0017\", MODE=\"0664\", GROUP=\"plugdev\"\n```<\/p><\/li>\n
  5. Add your user to the plugdev<\/code> group:<\/p>\n\n
    sudo usermod -a -G plugdev <username><\/code><\/p><\/li>\n
  6. Restart udev:<\/p>\n\n
    sudo service udev restart<\/code><\/p><\/li>\n
  7. Log out of your session and log back in.<\/p><\/li>\n
  8. Enroll your fingerprints with fingerprint-gui<\/code>, verify them, then see if a sudo -s<\/code> now suddenly asks you for your fingerprint.<\/p><\/li>\n<\/ol>\n<\/div>\n <\/div>\n 
    \n  view raw source<\/a>\n  README.md<\/a>\n <\/div>\n<\/div>\n<\/div>\n"}