I'm using a Yubikey (OpenPGP v2.1 card).
$ gpg-card Reader ...........: 1050:0407:X:0 Card type ........: yubikey Card firmware ....: 5.1.2 Serial number ....: D2760001240100000006090745820000 Application type .: OpenPGP Version ..........: 2.1 Displayed s/n ....: 9 074 582 Manufacturer .....: Yubico (6) Name of cardholder: Otto Example Language prefs ...: [not set] Salutation .......: URL of public key : [not set] Login data .......: [not set] Signature PIN ....: not forced Max. PIN lengths .: 127 127 127 PIN retry counter : 3 3 3 Signature counter : 42 Capabilities .....: key-import algo-change button priv-data UIF setting ......: Sign=off Decrypt=off Auth=off Signature key ....: 930509C5F5BD42B2ABCB4C7BDC2FD64BE59086CE keyref .....: OPENPGP.1 (sign,cert) algorithm ..: rsa2048 stored fpr .: AF440A8368A6C258DB22AC2C06B697821DAABF4B created ....: 2020-12-04 09:33:03 Encryption key....: AEA62514505EBDDB4C2FF8AF27B02F221ECAFBCE keyref .....: OPENPGP.2 (encr) algorithm ..: rsa2048 stored fpr .: 9E81894389EE38719E8467530426BF61A5CD515C created ....: 2020-12-04 09:33:03 Authentication key: 56EBCBEEA72DBF1BFAFE583F7FF36CBCB895C265 keyref .....: OPENPGP.3 (sign,auth) algorithm ..: rsa2048 stored fpr .: A81859F68ADB4CA16DBB71C3312145CAE3019B42 created ....: 2020-12-04 09:33:03 gpg/card> passwd OpenPGP card no. 9 074 582 detected 1 - change the PIN 2 - unblock and set new a PIN 3 - change the Admin PIN 4 - set the Reset Code Q - quit Your selection? 2
At this point a PIN entry dialog pops up asking for the Admin PIN. It should ask for the Reset Code.
The reason seems to be that gpg-card calls SCD PASSWD --reset OPENPGP.1, but according to the table before do_change_pin() ([[https://dev.gnupg.org/source/gnupg/browse/master/scd/app-openpgp.c;355e2992c043dd3241a9e838255f01418490ef33$3142 | app-openpgp.c:3142]]) and according to the actual code it should call SCD PASSWD OPENPGP.2. At least for OpenPGP v2+ cards. I don't know whether gpg-card is supposed to support also OpenPGP v1 cards.