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Yubikey4 3 second flashing
https://forum.yubico.com/viewtopic.php?f=26&t=2172
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Author:  KenMacD [ Tue Jan 19, 2016 10:08 pm ]
Post subject:  Yubikey4 3 second flashing

I'm getting a flash every 3 seconds with my Yubikey4.

Thinks seem to work fine though. U2F/OTP work on the demo page.

Code:
gpg --card-status
works, and after running this the light turns on solid, but instead flashes off quickly every 3 seconds.

Disabling CCID stops this from happening.

In the logs for pcscd I see:

Code:
Jan 19 16:49:51 yoga pcscd[13889]: 00000000 ifdhandler.c:130:CreateChannelByNameOrChannel() failed
Jan 19 16:49:51 yoga pcscd[13889]: 00000035 readerfactory.c:1043:RFInitializeReader() Open Port 0x200000 Failed (usb:1050/0407:libudev:0:/dev/bus/usb/002/095)
Jan 19 16:49:51 yoga pcscd[13889]: 00000003 readerfactory.c:335:RFAddReader() Yubico Yubikey 4 OTP+U2F+CCID init failed.
Jan 19 16:49:52 yoga pcscd[13889]: 00065025 ifdhandler.c:130:CreateChannelByNameOrChannel() failed
Jan 19 16:49:52 yoga pcscd[13889]: 00000011 readerfactory.c:1043:RFInitializeReader() Open Port 0x200002 Failed (usb:1050/0407:libudev:1:/dev/bus/usb/002/095)
Jan 19 16:49:52 yoga pcscd[13889]: 00000003 readerfactory.c:335:RFAddReader() Yubico Yubikey 4 OTP+U2F+CCID init failed.


A
Code:
pcsc_scan
runs until identifying the card, then hangs.

Code:
piv-tool --serial
worked yesterday, but now returns:

Code:
Using reader with a card: Yubico Yubikey 4 OTP+U2F+CCID 00 00
sc_card_ctl(*, SC_CARDCTL_GET_SERIALNR, *) failed -1201


I've tried resetting both PIV and openpgp. With the yubico-piv-tool I did a generate/selfsign-certificate/import-certificate and it all worked.

Other ideas?

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