Comment 19 for bug 1956885

Hi Andy & Kai-Chuan Hsieh

Thanks for checking, will discuss with internal team and get back to you
whether it is before our QA or after broadcom QA.

Thanks
Prafulla

On Mon, 12 Sep 2022 at 8:00 AM, Kai-Chuan Hsieh <email address hidden>
wrote:

> @prafullakota
>
> Thanks for your help, is it possible to deliver new binary for us to
> create new broadcom-tod debian package to let more user can try?
>
> Thanks,
>
> --
> You received this bug notification because you are subscribed to the bug
> report.
> https://bugs.launchpad.net/bugs/1956885
>
> Title:
> Incorrect verify implementation, unable to verify on one finger
>
> Status in libfprint-2-tod1-broadcom:
> Confirmed
> Status in OEM Priority Project:
> Confirmed
> Status in libfprint package in Ubuntu:
> Confirmed
>
> Bug description:
> The closed-source library blocks on synchronous USB transfers in its
> "verify" method (at least, there might be others with the same issue).
> The "identify" one is correct (asynchronous).
>
> As a result :
> $ fprintd-verify
> Using device /net/reactivated/Fprint/Device/0
> Listing enrolled fingers:
> - #0: right-index-finger
> (finger pressed)
> Verify started!
> Verifying: right-index-finger
> (blocked)
>
> "Verify started!" should happen immediately, but the code libfprint code
> waits for fp_device_verify to return, which only happens when the finger is
> pressed with this driver.
> The verify success message is sent during the call, so it is ignored.
>
> "fprintd-verify -f any" and pam-fprintd use fp_device_identify, so they
> work correctly.
> But with
> https://gitlab.freedesktop.org/libfprint/fprintd/-/commit/fc65055279 (so
> I suppose on jammy), the "verify" method will be used instead if only one
> finger is enrolled.
>
> TL,DR: the fingerprint reader appears to mostly work on focal, but
> starting with jammy it won't unless at least two fingers are enrolled.
>
> Note that this is tested on a Dell Latitude 5521, but the issue should
> be the same with all Broadcom fingerprint readers using this library.
>
> Duplicate bug #1981974
>
> To manage notifications about this bug go to:
>
> https://bugs.launchpad.net/libfprint-2-tod1-broadcom/+bug/1956885/+subscriptions
>
> --
Thanks,
Prafulla Kota
9866544810