environment: gentoo linux, openrc
when I read the yubikey card status with gpg 2.3.2, error occures:
```
~ › gpg --card-status
gpg: selecting card failed: No such device
gpg: OpenPGP card not available: No such device
```
debug scd, and this is the log:
```
…
…
2021-09-30 19:57:41 scdaemon[13375] DBG: ccid-driver: wlcdLayout none
2021-09-30 19:57:41 scdaemon[13375] DBG: ccid-driver: bPINSupport 0
2021-09-30 19:57:41 scdaemon[13375] DBG: ccid-driver: bMaxCCIDBusySlots 1
2021-09-30 19:57:41 scdaemon[13375] DBG: ccid-driver: usb_claim_interface failed: -6
2021-09-30 19:57:41 scdaemon[13375] ccid open error: skip
…
```
I check the libusb code [[ https://github.com/libusb/libusb/blob/5c89594f64ed5a14470d9965e558fd9aee1fd42c/libusb/libusb.h#L1066 | here ]], and it seems to be in conflict with pcscd. gpg 2.3.2 works fine if pcscd stoped.
Version 2.2.29 has the same problem but 2.2.29 will fallback to use PC/SC driver instead. ( The pcscd is the dependence of yubikey-manager for OTP feature, I have to use it. )
Full debug logs with the following scdaemon.conf are here: [[ https://fars.ee/b0cB | scd.log ]] , [[ https://fars.ee/n6dP | gpg --debug ipc --card-status ]]
```
debug-all
debug-level guru
log-file /tmp/scd.log
debug-ccid-driver
verbose
verbose
verbose
```
I can use gpg 2.3.2 normally by adding `disable-ccid` to scdaemon.conf, however I am not sure if this is a bug or the design is the way it is, so I post it here.
And, gpg 2.3.2 cannot show the correct version by `gpg --card-status`, it's always `0.0` whether it uses ccid-driver or PC/SC.