[ltp] Strange wireless problem

[Jeffrey L. Taylor]

Quoting Behrang Saeedzadeh <behrangsa@gmail.com>:
> Hi all
> 
> Before installing Ubuntu Hoary on my ThinkPad R51 I was using Ubuntu Warty 
> and I could finally make my wireless work by adding some lines to the 
> /etc/network/interfaces file.
> 
> Yesterday I fresh installed Hoary on my system and added the same lines to 
> the /etc/network/interfaces file and restarted my system and my wireless was 
> up and running.
> 
> But I don't know why my wireless connection turns down after some 30-40 
> mins. And then I cannot make it work without restarting my system.
> 
> When I execute the iwconfig eth1 this is what I get:
> 
> eth1 unassociated ESSID:"Shuttle"
> Mode:Managed Channel=0 Access Point: 00:00:00:00:00:00
> Bit Rate=0 kb/s Tx-Power=20 dBm
> RTS thr:off Fragment thr:off
> Encryption key:1359-1109-59 Security mode:open
> Power Management:off
> Link Quality:0 Signal level:0 Noise level:0
> Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
> Tx excessive retries:0 Invalid misc:1 Missed beacon:0
> 

Look in syslog when it stops working.  Also, what brand & model
wireless card.  And probably version of kernel and driver (for
non-Ubuntu users) are helpful to debug your problem.

HTH,
  Jeffrey