[Bug 1092715] Re: udevadm trigger --action=change not working in quantal and raring

[Serge Hallyn]

The cause of the problem is simply the udev-acl call in 70-udev-
acl.rules.  Since this is a higher # rule than 40-qemu-kvm.rules, it
gets run after.

The problem can be solved by:

1. moving 40-qemu-kvm.rules to 72-qemu-kvm.rules
2. making qemu-kvm depend on acl
3. appending RUN+="/usr/bin/setfacl -m g::rw /dev/kvm" to 72-qemu-kvm.rules.

** No longer affects: linux (Ubuntu)

** Package changed: udev (Ubuntu) => qemu-kvm (Ubuntu)

** Also affects: qemu-kvm (Ubuntu Quantal)
   Importance: Undecided
       Status: New

** Also affects: qemu-kvm (Ubuntu Precise)
   Importance: Undecided
       Status: New

** Also affects: qemu-kvm (Ubuntu Raring)
   Importance: High
       Status: Confirmed

** Changed in: qemu-kvm (Ubuntu Quantal)
       Status: New => Confirmed

** Changed in: qemu-kvm (Ubuntu Precise)
       Status: New => Confirmed

** Changed in: qemu-kvm (Ubuntu Quantal)
   Importance: Undecided => High

** Changed in: qemu-kvm (Ubuntu Precise)
   Importance: Undecided => High

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https://bugs.launchpad.net/bugs/1092715

Title:
  udevadm trigger --action=change not working in quantal and raring

Status in “qemu-kvm” package in Ubuntu:
  Confirmed
Status in “qemu-kvm” source package in Precise:
  Confirmed
Status in “qemu-kvm” source package in Quantal:
  Confirmed
Status in “qemu-kvm” source package in Raring:
  Confirmed

Bug description:
  For bug 1057024, we have qemu-kvm postinst call udevadm trigger
  --action=change.  This is to make udev recalculate permissions for
  /dev/kvm based on the new /lib/udev/rules.d/40-qemu-kvm.rules file.

  In precise, this causes /dev/kvm's acls to be correctly set so that
  group has rw permissions.

  In quantal, with the exact same rules file, it does not.  After a
  reboot, permissions are set correctly.  But manually running udevadm
  trigger --subsystem=misc --action=change (or variations of that) does
  not change the group acl.  It changes the group ownership, and part of
  the acl, but not the group acl.

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