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My ssh connection to a live CD environment running Ubuntu Quantal gets really slow when the live system is left alone for a while. Moving its physical mouse[1] a bit instantly cures this. What could be reasons for ssh to get so slow? Randomness is already refilled quickly using haveged, so at least that should not be a reason to require mouse movements. Are there other ways to keep the remote live CD system awake?

I found a similar-sounding question about the whole system slowing down until mouse is moved, but in my case it does not appear to affect programs on the live CD system.

[1] As opposed to the simulated mouse movements that I let xdotool do every few seconds to at least keep the screen awake since the screen standby setting doesn't work.

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Just to be sure, the SSH-connection is the only thing affected? Other programs don't slow down? – Dratir Jan 5 at 17:42
Have you checked some parameters like the system load average (uptime), the processes that use most CPU time (top), the processes that use most IO time (iotop) and things like that? – Andrea Corbellini Jan 5 at 17:42
@andrea-corbellini: sorry for the earlier comment with incomplete info, I intended a newline, pressed enter, submitted. :-/ htop shows load avg as 0.17 0.46 0.40; earlier without iotop it was 0.00 0.05 0.12. iotop reports "init" at top with all values as 0.00 B/s. sometimes kjournald pops up for a fraction of a second with up to 11 KB/s write. the processes with most CPU usage are iotop's python (1 to 5 %), then htop (1 %), then compiz (0%). – mk.pmb Jan 5 at 18:19
Better answer comments by editing your question instead of adding another comment – guntbert Jan 5 at 18:48

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