Ubuntu hangs on boot

[James Michael Fultz]

* Sherin George <list at sheringeorge.co.cc> [2009-10-02 10:51 +0530]:
> Hello Friends,
> 
> I am using Xubuntu 9.04.
> 
> My system hangs & goes to blank screen during boot process at times.
> Keyboard also hangs, so I can't switch to console and see what is going on
> 
> A hard reboot fixes the problem. But I am trying to find what could be
> causing this.
> 
> Here is the extract from my /var/log/messages.
> 
> ===================================================================== [...]
> [...]
> Oct 2 10:09:46 mypc kernel: [ 75.604886] eth0: link down
> Oct 2 10:09:46 mypc kernel: [ 75.605005] ADDRCONF(NETDEV_UP): eth0: link is
> not ready
> [...]
> ===================================================================== [...]

It appears to be a networking-hardware-related issue.  May be a
disconnected Ethernet cable or faulty Ethernet cable unless of course
eth0 is a wireless interface.