Windows Hello Interference on 2.3.X

Fredric Silberberg fred at
Thu Sep 9 01:54:12 CEST 2021

Hi GPG Mailing list, is there anything I can do to help someone look at
this issue?

- Fred Silberberg

On Wed, Aug 25, 2021 at 12:09 PM Fredric Silberberg <fred at>

> Hi folks,
> It appears some changes in the 2.3.X branch have broken my Yubikey OpenPGP
> key on systems that also have a Windows Hello for Business PIN set up.
> Here's the behavior I'm seeing:
> scdaemon.conf:
> debug-level guru
> log-file "%APPDATA%\gnupg\scdaemon.log"
> reader-port "Yubico YubiKey OTP+FIDO+CCID 0"
> 2.2.29: The above works, gpg --card-status returns info on my Yubikey.
> 2.3.0/1: gpg --card-status returns:
> gpg: selecting card failed: End of file
> gpg: OpenPGP card not available: End of file
> Log file: attached, scdaemon.2.3.1.log
> 2.3.2: gpg --card-status enters an infinite loop, never completing and
> pegging a single CPU as hard as it can. The log file output is attached,
> scdaemon.2.3.2.log. I've clipped it to not overwhelm inboxes, but the last
> two lines will continuously repeat, making the file as big as you let it
> run.
> I'd appreciate any help or insight into what's going on here. For the
> moment, I'm still using 2.2.29 because the 2.3.X versions are totally
> busted for me.
> Thanks,
> - Fred Silberberg
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