I have just successfully upgraded my OpenWRT powered TL-WDR3600 from Barrier Breaker to Chaos Calmer.
I Downloaded the “sysupgrade.bin” version of the firmware, logged in went to system>backup/flash firmware kept the tick in place to keep settings and flashed the update…
Then the lights went off and only 3 came on… feeling of slight panic set in , had I bricked the router? (again)
I waited for a while (5 minutes or so, and thought damn it , and switched the router off and then after a short wait on….
After what seemed to be an age, all the lights came on , I logged back in , and SUCCESS!!
Model: TP-Link TL-WDR3600 v1
Firmware Version: OpenWrt Chaos Calmer 15.05 / LuCI (git-15.248.30277-3836b45)
Kernel Version: 3.18.20
Lovin’ having an OpenWRT Router