@tshering, @enotar and @olobolger:
Could any of you Touch owners enable debugging with the "-d" flag after
reader.lua in
koreader_kobo.sh, start koreader and press the home button a number of times and post the resulting
ev.log file? It would give us the event codes for the home button from which we could return to home screen after exiting koreader.
Rather nice would also be a binary file for the home button as generated by
pacos' method.
The first result would allow us to return to the Nickel homescreen using koreader lua-code, the second would hack the koreader_kobo.sh script to do it quick and dirty.