The netconsole kernel module
If you do not have the hardware, wich is common because most laptops do not come with a COM port nowadays, you can use the netconsole module wich is very handy. It uses very low level network device calls to send via UDP console output across your network. It is included in the standard debian kernel. Using this may help you debug anything but your network device controller driver. In /etc/modprobe.d/, add a file that reads :
options netconsole firstname.lastname@example.org/eth1 \ email@example.com/01:23:34:56:78:9A
On the 192.168.1.6 box, run :
$ nc -l -p 32769 -u
Then, simply modprobe netconsole on 192.168.1.1 and output should start to appear on 192.168.1.6.
More information on Using Netconsole to See Kernel Messages.
Nothing shows when my kernel hangs!
This is the worse case scenario. Linux is usually very talkative. At this point, there is a very good chance that your problem is hardware related :
Good luck, because I know this is very annoying!
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