Conserver will also automatically restart dead dpcproxy connections, and continue to log output during interactive use (unless you tell it not to).
local keyboard activity, as simulated by some kvms), but I have not verified this.
The IPMI standard allows for other interfaces as well.
The packages and tools that I used to gain access to IPMI functionality are: Note, that as far as I know, the IPMI device is most likely to end up at device major number 254, but that it will take devices from the 240-254 block, which according to linux/Documentation/is "Allocated for local/experimental use.
You should then be able to log in as root, and reboot the machine, following the entire boot process on the serial console.
To get out of the SOL session, you need to send the sequence "~." to the dpcproxy program.