I ran pcscd as you suggested, capturing output. Made sure the smart card was working by using my SSH key. I was then able to reproduce the 100% cpu condition by plugging in my Logitech USB webcam.
Attached the output, but I redacted the hex dumps before posting here because I'm not sure if they contain sensitive information. Let me know if you need the original. ** Attachment added: "pcscd debug output (redacted)" https://bugs.launchpad.net/ubuntu/+source/pcsc-lite/+bug/1551897/+attachment/4587143/+files/pcscd.log.redacted -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to pcsc-lite in Ubuntu. https://bugs.launchpad.net/bugs/1551897 Title: Excessive CPU utilization Status in pcsc-lite package in Ubuntu: New Bug description: In xenial, pcscd CPU utilization occasionally goes haywire: PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 27404 root 20 0 384264 4992 2228 S 100.3 0.0 75:39.03 /usr/sbin/pcscd --foreground --auto-exit I get this about once a day since installing xenial. I can't quite connect it to any specific event on the system, it just seems to happen sporadically -- fan turns on, I run top, and there it is again. Never had this issue on same hardware incl. smartcard with trusty. I wonder if it might be this? https://bugs.debian.org/cgi- bin/bugreport.cgi?bug=718473 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/pcsc-lite/+bug/1551897/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp