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[Marco Trevisan (Treviño) <mail@xxxxxxxxx>]

Ok, I've given another read to the specs, and well, this atom as most of
the NET_WM_* atoms must be filled by the window manager, to notify
people around (in the old days where each process/component was an
element of the shell) about what actions it can support for the given
window, and it has not to be set by the window itself.

In fact your example works only if you launch it with no window manager set.
If an app doesn't want to be resizable, it should inform the WM using another protocol (and in this case the _MOTIF_WM_HINTS) as shown in the attached example (setting that hint the WM will update correctly the NET_WM_ALLOWED_ACTIONS).

** Attachment added: "allowed-actions-mwm.c"
   https://bugs.launchpad.net/ubuntu/+source/unity/+bug/1387711/+attachment/4260539/+files/allowed-actions-mwm.c

** Changed in: unity
       Status: Incomplete => Won't Fix

** Changed in: unity (Ubuntu)
       Status: Incomplete => Won't Fix

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https://bugs.launchpad.net/bugs/1387711

Title:
  Unity doesn't respect NET_WM_ALLOWED_ACTIONS

Status in Unity:
  Won't Fix
Status in “unity” package in Ubuntu:
  Won't Fix

Bug description:
  According to http://standards.freedesktop.org/wm-spec/latest/ar01s05.html :
  Atoms present in the list indicate allowed actions, atoms not present in the list indicate actions that are not supported for this window. The Window Manager MUST keep this property updated to reflect the actions which are currently "active" or "sensitive" for a window.

  However, if I set NET_WM_ALLOWED_ACTIONS to a list not containing
  NET_WM_ACTION_RESIZE (along with the MAXIMIZE atoms), I can still
  resize/maximize the window using the mouse. Only by forcing min and
  max size in the WM normal hints can I achieve the desired behavior.

  ProblemType: Bug
  DistroRelease: Ubuntu 14.10
  Package: unity 7.3.1+14.10.20141016-0ubuntu1
  ProcVersionSignature: Ubuntu 3.16.0-23.31-generic 3.16.4
  Uname: Linux 3.16.0-23-generic x86_64
  NonfreeKernelModules: nvidia
  ApportVersion: 2.14.7-0ubuntu8
  Architecture: amd64
  CompizPlugins: [core,composite,opengl,decor,compiztoolbox,vpswitch,move,gnomecompat,grid,place,regex,imgpng,resize,annotate,mousepoll,wobbly,session,animation,fade,animationaddon,cube,rotate,workarounds,unitymtgrabhandles,cubeaddon,trailfocus,scale,expo,ezoom,unityshell]
  CurrentDesktop: Unity
  Date: Thu Oct 30 15:19:30 2014
  InstallationDate: Installed on 2011-05-11 (1267 days ago)
  InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release amd64 (20110427.1)
  SourcePackage: unity
  UpgradeStatus: Upgraded to utopic on 2014-10-27 (3 days ago)

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