Package: pcscd Version: 1.8.20-1 Severity: grave Since I upgraded from 1.8.19-1 to 1.8.20-1 (or maybe it is because of scdaemon 2.1.18, unclear), I cannot reliably use pcscd for multiple days.
After a while, the pcscd daemon just disappears, and then scdaemon cannot talk to it anymore: fév 09 11:37:57 curie gpg-agent[23116]: scdaemon[32496] pcsc_establish_context failed: no service (0x8010001d) This was partly documented in #854005 (GnuPG bug) and #854616 (scdaemon bug) which both have workarounds, and I was able to finally use my yubikey *without* pcscd. But I believe there is a pcscd-specific bug here that makes it basically unusable (hence the grave severity). $ systemctl --system status pcscd ● pcscd.service - PC/SC Smart Card Daemon Loaded: loaded (/etc/systemd/system/pcscd.service; indirect; vendor preset: enabled) Active: inactive (dead) since Wed 2017-02-08 21:37:16 EST; 14h ago Process: 15485 ExecStart=/usr/sbin/pcscd --foreground --auto-exit --debug (code=exited, status=0/SUCCESS) Main PID: 15485 (code=exited, status=0/SUCCESS) As you may have noticed, I have modified the .service file to enable debugging: [Unit] Description=PC/SC Smart Card Daemon Requires=pcscd.socket [Service] ExecStart=/usr/sbin/pcscd --foreground --auto-exit --debug ExecReload=/usr/sbin/pcscd --hotplug [Install] Also=pcscd.socket After that, I have noticed that pcscd gladly commits suicide: fév 08 21:37:15 curie pcscd[15485]: 00000023 pcscdaemon.c:225:signal_thread() Preparing for suicide That time is about the time I stopped working last night. I unplugged my Yubikey and went to bed. The workaround is, obviously, to restart pcscd: sudo systemctl restart pcscd It is unclear to me why this regression happened. The systemd files haven't changed since 2011, so presumably the use of --auto-exit is normal. Maybe something changed in the --auto-exit algorithm? Looking upstream, I can't find anything specific. Maybe scdaemon doesn't talk to the right socket anymore, or that socket activation is failing somehow? Am I the only one seeing this behavior? Thanks to scdaemon changes, I can now use my Yubikey *without* pcscd, but that makes the package basically unusable for me... So I figured this should be fixed for stretch. Thanks for your attention. -- System Information: Debian Release: 9.0 APT prefers testing APT policy: (500, 'testing'), (1, 'unstable') Architecture: amd64 (x86_64) Kernel: Linux 4.9.0-1-amd64 (SMP w/4 CPU cores) Locale: LANG=fr_CA.UTF-8, LC_CTYPE=fr_CA.UTF-8 (charmap=UTF-8) Shell: /bin/sh linked to /usr/bin/dash Init: systemd (via /run/systemd/system) Versions of packages pcscd depends on: ii init-system-helpers 1.47 ii libc6 2.24-9 ii libccid [pcsc-ifd-handler] 1.4.26-1 ii libpcsclite1 1.8.20-1 ii libudev1 232-15 ii lsb-base 9.20161125 pcscd recommends no packages. Versions of packages pcscd suggests: ii systemd 232-15 -- no debconf information
