Johnny, you can remove the pcscd package if you do not use it.
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https://bugs.launchpad.net/bugs/1551897
Title:
Excessive CPU utilization
Status in pcsc-lite package in Ubuntu:
Confirmed
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
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