[Pkg-acpi-devel] Bug#736258: acpid won't stop, won't upgrade (systemd) - https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=736258

[Henrique de Moraes Holschuh]

On Sat, 26 Jul 2014, Zenaan Harkness wrote:
> Interrelated problem A:
> $ ps aux|egrep -i acpid
> root       318  0.0  0.0      0     0 ?        S<   12:40   0:00 [ktpacpid]
> root     19855  0.0  0.0   4372   972 ?        Ss   17:45   0:00 /usr/sbin/acpid
> $ sudo systemctl stop acpid
> Job for acpid.service canceled.
> $ ps aux|egrep -i acpid
> root       318  0.0  0.0      0     0 ?        S<   12:40   0:00 [ktpacpid]
> root     19960  0.0  0.0   4372   972 ?        Ss   17:46   0:00 /usr/sbin/acpid

acpid was restarted after you stopped it.

Since just about everything in a "modern desktop" will pester the acpi
netlink socket, please ask a systemd expert whether "systemctl stop"
*blocks* socket activation of that service until further notice, or not.

If it doesn't block socket activation, then we have a grave problem in the
systemd invoke-rc.d interface.

The semanthics for invoke-rc.d stop is that the service must NOT be
restarted automatically until it is manually restarted by the admin or by
invoke-rc.d.  These semanthics are *required* for proper package
upgrades/downgrades.   Note that a direct call to systemctl does count as
"manual invocation by the admin".

-- 
  "One disk to rule them all, One disk to find them. One disk to bring
  them all and in the darkness grind them. In the Land of Redmond
  where the shadows lie." -- The Silicon Valley Tarot
  Henrique Holschuh