scdaemon forgets sometimes some data from an OpenPGP card

[Michael Bienia]

Hello,

I've a problem that sometimes gpg --card-status doesn't display all data
from the OpenPGP card (I've use-agent in my gpg.conf).

If I plug in the card the first time after booting, the output of
gpg --card-status is as expected. But I call gpg --card-status again the
field for PIN length and the counters display zeros:
| Max. PIN lengths .: 0 0 0
| PIN retry counter : 0 0 0
| Signature counter : 0
If the card is in this state it can't be used. After killing scdaemon or
reinserting the card it works again.

Michael