nomachines nx windows can't get focus

[Amir Vadai]

Using nomachines nx, I'm having rootless session on a ubuntu 11.04

I can't change focus to nx windows using alt-tab.

From digging into mutter code I see that nx windows gives bad timestamp when having _NET_WM_USER_TIME changed.

For example, local windows having timestamp of 58806978, while nx windows are having a timestamp of 1725594813.
It seems that nx windows timestamp is based on a different time than the local windows.

I'm not an X expert.

If I'm understanding right, there is a timer in the local X server, which gives timestamps. But nx windows get their timestamp from their xserver which is the nxagent. and this property is somehow forwarded to the local X.
Please fix me if I'm mistaken.

So if the timestamps of nx windows are origined from a differnet timer, how could it be compared to local timestamps?

My environment details:
Description: Ubuntu 11.04
Release: 11.04

libmutter0:
  Installed: 3.0.2.1-2ubuntu2~natty1
  Candidate: 3.0.2.1-2ubuntu2~natty1
  Version table:
     3.0.2.1-2ubuntu2~natty1 0
        500 http://ppa.launchpad.net/gnome3-team/gnome3/ubuntu/ natty/main amd64 Packages
 *** 3.0.2.1-2ubuntu2~natty1 0
        100 /var/lib/dpkg/status

nxclient:
  Installed: (none)
  Candidate: (none)
  Version table:
     3.5.0-7 0
        100 /var/lib/dpkg/status