Ubuntu boot error : fixing recursive fault but reboot is needed

While booting ubuntu, you are not able to reach upto Login screen. It appears with long list of errors and finally you get "fixing recursive fault but reboot is needed"

Solution :
Boot ubuntu in recovery mode and open command prompt
Now edit following grub file.

sudo nano /etc/default/grub
Change the line

GRUB_CMDLINE_LINUX_DEFAULT="quiet splash" 
to
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi=off"
sudo update-grub
sudo reboot

You should not get the error again and Login screen should be opened successfully.

ejabberd : Other users are not visible after login

Uncomment line

{mod_shared_roster,[]},

in config file of ejabberd and restart ejabberd.

config file - /etc/ejabberd/ejabberd.cfg 

Now you can see option "shared roster group".

Create a group and add users in the group. You can see all users of same group after login.

ejabberd : No other options except virtualhosts in admin

ejabberd : All links missing, partial admin appears

sudo nano /etc/ejabberd/ejabberd.cfg


Find lines
{acl, admin, {user, "", "localhost"}}.
%% Hostname
{hosts, ["localhost"]}.

and replace it with

{acl, admin, {user, "admin", "localhost"}}.
%% Hostname
{hosts, ["localhost"]}.



Restart ejabberd