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Thread: Fingerprint reader fails for non-root users in openSUSE Laeap 42.1

  1. #1

    Question Fingerprint reader fails for non-root users in openSUSE Laeap 42.1

    The fingerprint reader system does not work correctly for non-root users in openSUSE Leap 42.1. Fingerprints will successfully scan, yet the fingerprint data is not stored. This happens despite the fingerprint reader working correctly for the root user.

    Logged in as root:
    Code:
    TuxBox:/ # fprintd-enroll --finger right-index-finger john<Enter>
    Using device /net/reactivated/Fprint/Device/0
    Enrolling right-index-finger finger.
    Enroll result: enroll-stage-passed
    Enroll result: enroll-stage-passed
    Enroll result: enroll-stage-passed
    Enroll result: enroll-stage-passed
    Enroll result: enroll-completed
    TuxBox:/ # fprintd-list john<Enter>
    found 1 devices
    Device at /net/reactivated/Fprint/Device/0
    Using device /net/reactivated/Fprint/Device/0
    User john has no fingers enrolled for Upek TouchChip Fingerprint Coprocessor.
    Please help.

  2. #2
    Join Date
    Jun 2008
    Location
    Florida, USA
    Posts
    982

    Default Re: Fingerprint reader fails for non-root users in openSUSE Laeap 42.1

    Max314
    An observation which may have bearing on your problem:
    I was following you How-To
    for install on my Leap Laptop.

    I installed the fprintd files using YAST GUI rather than zypper, YAST auto installed (dependency) dbus-1-glib-32bit
    in addition to libfprint0.

    Once installed, I ran fprintd-enroll --finger right-ring-finger root in a root konsole.
    My Validity hardware woke up (flashing LED) but the enrollment terminated after just one finger swipe, not the expected 5.

    Something did save
    Code:
    HPDV7-Linux:~ # fprintd-list root
    found 1 devices
    Device at /net/reactivated/Fprint/Device/0
    Using device /net/reactivated/Fprint/Device/0
    Fingerprints for user root on Validity VFS5011 (swipe):
     - #0: right-ring-finger
    And subsequent attempted kdesu login does prompt for fingerprint, but fails to match.

    I sort of get the feeling the fingerprint file is not valid, not sure where to go from here.

    As an add-on, I tried to enroll my user finger as well - it behaved similarly to my root attempt - only 1 swipe,
    but **DID** create a file
    Code:
    HPDV7-Linux:~ # fprintd-enroll --finger right-ring-finger carl
    Using device /net/reactivated/Fprint/Device/0
    Enrolling right-ring-finger finger.
    Enroll result: enroll-completed
    HPDV7-Linux:~ # fprintd-list carl
    found 1 devices
    Device at /net/reactivated/Fprint/Device/0
    Using device /net/reactivated/Fprint/Device/0
    Fingerprints for user carl on Validity VFS5011 (swipe):
     - #0: right-ring-finger
    Do you know where the fingerprint files are stored?

    Thanks for your well done How-To, I had sort of given up on Fprint.

    We must be close......
    Desk: Ryzen5 Leap 15.1
    Lap: HPDV7T i7 Leap 15.2

  3. #3

    Default Re: Fingerprint reader fails for non-root users in openSUSE Laeap 42.1

    Quote Originally Posted by cmcgrath5035 View Post
    Max314
    An observation which may have bearing on your problem:
    I was following you How-To
    for install on my Leap Laptop.

    I installed the fprintd files using YAST GUI rather than zypper, YAST auto installed (dependency) dbus-1-glib-32bit
    in addition to libfprint0.

    Once installed, I ran fprintd-enroll --finger right-ring-finger root in a root konsole.
    My Validity hardware woke up (flashing LED) but the enrollment terminated after just one finger swipe, not the expected 5.

    Something did save
    Code:
    HPDV7-Linux:~ # fprintd-list root
    found 1 devices
    Device at /net/reactivated/Fprint/Device/0
    Using device /net/reactivated/Fprint/Device/0
    Fingerprints for user root on Validity VFS5011 (swipe):
     - #0: right-ring-finger
    And subsequent attempted kdesu login does prompt for fingerprint, but fails to match.

    I sort of get the feeling the fingerprint file is not valid, not sure where to go from here.

    As an add-on, I tried to enroll my user finger as well - it behaved similarly to my root attempt - only 1 swipe,
    but **DID** create a file
    Code:
    HPDV7-Linux:~ # fprintd-enroll --finger right-ring-finger carl
    Using device /net/reactivated/Fprint/Device/0
    Enrolling right-ring-finger finger.
    Enroll result: enroll-completed
    HPDV7-Linux:~ # fprintd-list carl
    found 1 devices
    Device at /net/reactivated/Fprint/Device/0
    Using device /net/reactivated/Fprint/Device/0
    Fingerprints for user carl on Validity VFS5011 (swipe):
     - #0: right-ring-finger
    Do you know where the fingerprint files are stored?

    Thanks for your well done How-To, I had sort of given up on Fprint.

    We must be close......
    When I did the install of fprintd and related files from the command line as described in my tutorial, "dbus-1-glib-32bit" was automatically installed on my system too.

    I searched my system for where the fingerprint data files are stored, and found them at "/var/lib/fprint/". BTW - the fingerprint data files were formerly stored in "~/.fprint". Curiously, when I located where the fingerprint data files are now stored, I discovered a data file for my regular (non-root) users, which puzzles me even more. "I used to be confused, but now I just don't know." - Tears for Fears.

    I did some more digging in the openSUSE forums, and I discovered a possible solution of altering the dbus rules. I don't like this possible solution for two reasons:
    • It was not necessary on openSUSE 13.2, where I had the fingerprint reader working correctly using only the information from my fingerprint reader tutorial
    • I'm concerned this method of solving the problem may break something in the future


    I'm don't know where to go with this, and I encourage you to keep testing ideas until the problem relents and concedes victory to you.

  4. #4

    Default Re: Fingerprint reader fails for non-root users in openSUSE Laeap 42.1

    Having discovered that a fingerprint data file is indeed saved to disk at "/var/lib/fprint/" after successful enrollment of a non-root user, I did some tests that revealed some interesting information.

    First I checked to see if fprint knew of any fingerprints. Again, I got:
    Code:
    TuxBox:~ # fprintd-list john
    found 1 devices
    Device at /net/reactivated/Fprint/Device/0
    Using device /net/reactivated/Fprint/Device/0
    User john has no fingers enrolled for Upek TouchChip Fingerprint Coprocessor.
    despite a fingerprint data file already existing at "/var/lib/fprint/".

    So, I enrolled a finger again:
    Code:
    TuxBox:~ # fprintd-enroll --finger right-index-finger john
    Using device /net/reactivated/Fprint/Device/0
    Enrolling right-index-finger finger.
    Enroll result: enroll-stage-passed
    Enroll result: enroll-stage-passed
    Enroll result: enroll-stage-passed
    Enroll result: enroll-stage-passed
    Enroll result: enroll-completed
    The file for the fingerprint data file already existing at "/var/lib/fprint/" was modified to the current date and time, so I know with complete certainty the enrolling process is indeed saving a fingerprint data file immediately after a successful enrollment.

    I'm starting to wonder if this is a permissions problem with the non-root user's fingerprint data file.

  5. #5
    Join Date
    Jun 2008
    Location
    Florida, USA
    Posts
    982

    Default Re: Fingerprint reader fails for non-root users in openSUSE Laeap 42.1

    I have been playing, with limited success.

    First, the installed "libfrrint0" installs udev rules for popular sensors in /usr/lib/udev/rules.d.
    Check there first to see if your sensor is already setup.

    I also loaded package libfprint0-32bit. That may have helped me.

    In addition , package libfprint-examples has some interactive programs that tell you a bit more than the similarly named fprintd executables.
    For example, fprint_enroll vs fprintd-enroll
    Enrollment still only needs one swipe. I have no idea why your system requires 5, but averaging would seem to make sense.

    I was able to enroll a user finger and use fprint_verify to check it, but with only about a 10% success rate.

    fprintd is run by a systemd service - systemctl statu fprintd displays status.
    It is normally inactive, wakes up when an executable enables the scanner (LED comes on).

    What display manager did you successfully use?
    I am using the Leap 42.1 default sddm, which was rather ungracious about fprint scan failures, I was unable to get to a bpoint where it would accept a
    text password.
    Desk: Ryzen5 Leap 15.1
    Lap: HPDV7T i7 Leap 15.2

  6. #6

    Default Re: Fingerprint reader fails for non-root users in openSUSE Laeap 42.1

    Quote Originally Posted by cmcgrath5035 View Post
    First, the installed "libfrrint0" installs udev rules for popular sensors in /usr/lib/udev/rules.d.
    Check there first to see if your sensor is already setup.
    When I look in /usr/lib/udev/rules.d/60-fprint-autosuspend.rules, I do see my fingerprint reader listed:
    Code:
    # UPEK TouchStrip Sensor-Only
    SUBSYSTEM=="usb", ATTRS{idVendor}=="147e", ATTRS{idProduct}=="2016", ATTRS{dev}=="*", TEST=="power/control", ATTR{power/control}="auto"
    Quote Originally Posted by cmcgrath5035 View Post
    Enrollment still only needs one swipe. I have no idea why your system requires 5, but averaging would seem to make sense.
    5 swipes during enrollment is the normal and correct behavior. It is also the behavior I experienced when using openSUSE 13.1 and openSUSE 13.2. If you are only getting one swipe during enrollment, something is very wrong.

    Quote Originally Posted by cmcgrath5035 View Post
    What display manager did you successfully use?
    SDDM on openSUSE Leap 42.1, like you.

    Quote Originally Posted by cmcgrath5035 View Post
    I am using the Leap 42.1 default sddm, which was rather ungracious about fprint scan failures, I was unable to get to a point where it would accept a text password.
    I agree with your comment about SDDM not being user-friendly about fingerprint scanning failures.

  7. #7
    Join Date
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    Location
    Florida, USA
    Posts
    982

    Default Re: Fingerprint reader fails for non-root users in openSUSE Laeap 42.1

    Quote Originally Posted by Max314 View Post
    5 swipes during enrollment is the normal and correct behavior. It is also the behavior I experienced when using openSUSE 13.1 and openSUSE 13.2. If you are only getting one swipe during enrollment, something is very wrong.
    When I reread my comment, I realized it sounded like one swipe was all that was needed - not my intent.

    So it is curious that on my system, I am only getting one swipe before the reader LED goes out, and the enroll process completes without error message.

    Are we running the same versions?
    Here are mine
    Code:
     # zypper -i info  fprintd*
    Loading repository data...
    Reading installed packages...
    
    
    Information for package fprintd-devel:
    --------------------------------------
    Repository: Main Repository (OSS)
    Name: fprintd-devel
    Version: 0.6.0-2.2
    Arch: noarch
    Vendor: openSUSE
    Installed: No
    Status: not installed
    Installed Size: 97.1 KiB
    Summary: Development files for fprintd
    Description: 
      Development documentation for fprintd, the D-Bus service for
      fingerprint readers access.
    
    Information for package fprintd-lang:
    -------------------------------------
    Repository: hardware
    Name: fprintd-lang
    Version: 0.6.0-15.1
    Arch: noarch
    Vendor: obs://build.opensuse.org/hardware
    Installed: Yes
    Status: up-to-date
    Installed Size: 168.9 KiB
    Summary: Languages for package fprintd
    Description: 
      Provides translations to the package fprintd
    
    Information for package fprintd:
    --------------------------------
    Repository: hardware
    Name: fprintd
    Version: 0.6.0-15.1
    Arch: x86_64
    Vendor: obs://build.opensuse.org/hardware
    Installed: Yes
    Status: up-to-date
    Installed Size: 159.7 KiB
    Summary: D-Bus service for Fingerprint reader access
    Description: 
      D-Bus service to access fingerprint readers.
    
    Information for package fprintd-pam:
    ------------------------------------
    Repository: hardware
    Name: fprintd-pam
    Version: 0.6.0-15.1
    Arch: x86_64
    Vendor: obs://build.opensuse.org/hardware
    Installed: Yes
    Status: up-to-date
    Installed Size: 28.8 KiB
    Summary: PAM module for fingerprint authentication
    Description: 
      PAM module that uses the fprintd D-Bus service for fingerprint
      authentication.
    
    Information for package fprintd-pam-32bit:
    ------------------------------------------
    Repository: hardware
    Name: fprintd-pam-32bit
    Version: 0.6.0-15.1
    Arch: x86_64
    Vendor: obs://build.opensuse.org/hardware
    Installed: Yes
    Status: up-to-date
    Installed Size: 21.6 KiB
    Summary: PAM module for fingerprint authentication
    Description: 
      PAM module that uses the fprintd D-Bus service for fingerprint
      authentication.
    I am running Plasma5.6, but none of this appears to be Plasma related.
    Desk: Ryzen5 Leap 15.1
    Lap: HPDV7T i7 Leap 15.2

  8. #8

    Default Re: Fingerprint reader fails for non-root users in openSUSE Laeap 42.1

    Quote Originally Posted by cmcgrath5035 View Post
    Are we running the same versions?
    No, we are not running the same versions. Here are mine:
    Code:
    TuxBox:~ # zypper -i info  fprintd*
    Information for package fprintd:
    --------------------------------
    Repository: openSUSE Leap 42.1 - Hardware Tools (fingerprint reader)
    Name: fprintd
    Version: 0.6.0-15.1
    Arch: x86_64
    Vendor: obs://build.opensuse.org/hardware
    Installed: Yes
    Status: up-to-date
    Installed Size: 159.7 KiB
    Summary: D-Bus service for Fingerprint reader access
    Description: 
      D-Bus service to access fingerprint readers.                                                                                                                     
                                                                                                                                                                       
    Information for package fprintd-devel:                                                                                                                             
    --------------------------------------                                                                                                                             
    Repository: openSUSE Leap 42.1 - Hardware Tools (fingerprint reader)                                                                                               
    Name: fprintd-devel                                                                                                                                                
    Version: 0.6.0-15.1                                                                                                                                                
    Arch: noarch                                                                                                                                                       
    Vendor: obs://build.opensuse.org/hardware                                                                                                                          
    Installed: No                                                                                                                                                      
    Status: not installed                                                                                                                                              
    Installed Size: 97.1 KiB                                                                                                                                           
    Summary: Development files for fprintd                                                                                                                             
    Description:                                                                                                                                                       
      Development documentation for fprintd, the D-Bus service for                                                                                                     
      fingerprint readers access.                                                                                                                                      
                                                                                                                                                                       
    Information for package fprintd-lang:                                                                                                                              
    -------------------------------------                                                                                                                              
    Repository: openSUSE Leap 42.1 - Hardware Tools (fingerprint reader)                                                                                               
    Name: fprintd-lang                                                                                                                                                 
    Version: 0.6.0-15.1                                                                                                                                                
    Arch: noarch
    Vendor: obs://build.opensuse.org/hardware
    Installed: Yes
    Status: up-to-date
    Installed Size: 168.9 KiB
    Summary: Languages for package fprintd
    Description: 
      Provides translations to the package fprintd
    
    Information for package fprintd-pam:
    ------------------------------------
    Repository: openSUSE Leap 42.1 - Hardware Tools (fingerprint reader)
    Name: fprintd-pam
    Version: 0.6.0-15.1
    Arch: x86_64
    Vendor: obs://build.opensuse.org/hardware
    Installed: Yes
    Status: up-to-date
    Installed Size: 28.8 KiB
    Summary: PAM module for fingerprint authentication
    Description: 
      PAM module that uses the fprintd D-Bus service for fingerprint
      authentication.
    
    Information for package fprintd-pam-32bit:
    ------------------------------------------
    Repository: openSUSE Leap 42.1 - Hardware Tools (fingerprint reader)
    Name: fprintd-pam-32bit
    Version: 0.6.0-15.1
    Arch: x86_64
    Vendor: obs://build.opensuse.org/hardware
    Installed: Yes
    Status: up-to-date
    Installed Size: 21.6 KiB
    Summary: PAM module for fingerprint authentication
    Description: 
      PAM module that uses the fprintd D-Bus service for fingerprint
      authentication.
    
    Information for package fprintd-debuginfo:
    ------------------------------------------
    Repository: openSUSE Leap 42.1 - OSS Debug
    Name: fprintd-debuginfo
    Version: 0.6.0-2.2
    Arch: x86_64
    Vendor: openSUSE
    Installed: No
    Status: not installed
    Installed Size: 209.1 KiB
    Summary: Debug information for package fprintd
    Description: 
      This package provides debug information for package fprintd.
      Debug information is useful when developing applications that use this
      package or when debugging this package.
    
    Information for package fprintd-debugsource:
    --------------------------------------------
    Repository: openSUSE Leap 42.1 - OSS Debug
    Name: fprintd-debugsource
    Version: 0.6.0-2.2
    Arch: x86_64
    Vendor: openSUSE
    Installed: No
    Status: not installed
    Installed Size: 138.6 KiB
    Summary: Debug sources for package fprintd
    Description:
      This package provides debug sources for package fprintd.
      Debug sources are useful when developing applications that use this
      package or when debugging this package.
    
    Information for package fprintd-pam-debuginfo:
    ----------------------------------------------
    Repository: openSUSE Leap 42.1 - OSS Debug
    Name: fprintd-pam-debuginfo
    Version: 0.6.0-2.2
    Arch: x86_64
    Vendor: openSUSE
    Installed: No
    Status: not installed
    Installed Size: 39.3 KiB
    Summary: Debug information for package fprintd-pam
    Description:
      This package provides debug information for package fprintd-pam.
      Debug information is useful when developing applications that use this
      package or when debugging this package.
    
    Information for package fprintd-pam-debuginfo-32bit:
    ----------------------------------------------------
    Repository: openSUSE Leap 42.1 - OSS Debug
    Name: fprintd-pam-debuginfo-32bit
    Version: 0.6.0-2.2
    Arch: x86_64
    Vendor: openSUSE
    Installed: No
    Status: not installed
    Installed Size: 31.0 KiB
    Summary: Debug information for package fprintd-pam
    Description:
      This package provides debug information for package fprintd-pam.
      Debug information is useful when developing applications that use this
      package or when debugging this package.
    Quote Originally Posted by cmcgrath5035 View Post
    I am running Plasma5.6, but none of this appears to be Plasma related.
    I am running Plasma 5.5

    It is disappointing no one else chimed in so far to give additional help or input on this problem.

  9. #9
    Join Date
    Jun 2008
    Location
    Florida, USA
    Posts
    982

    Default Re: Fingerprint reader fails for non-root users in openSUSE Laeap 42.1

    I am curious as to why you believe we are running different versions.
    All my files come from http://download.opensuse.org/reposit...USE_Leap_42.1/
    which I have named "hardware"

    I am thinking you named the repo "Hardware Tools (fingerprint reader)"

    Our installed versions seem to be the same.

    I am not real surprised we have not attracted much other comment.
    I sort of gave up on fprint a while ago, until you came along and reported some success.
    I was re-interested because fprint works well on my Android phone.

    I'll guess, for the moment, that my issue with fprint enrollment early abort (one scan vs five) might be related to dbus difference between Qt 5.5 and 5.6?
    Still digging for solutions, on occasion.
    Desk: Ryzen5 Leap 15.1
    Lap: HPDV7T i7 Leap 15.2

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