Looking at your initial observations and rfkill it's definitely not an
issue with WiFi being actually disabled or detected as such.

I'm especially concerned about the two following messages found in 
WifiSyslog.txt:
Nov  1 19:27:02 wildi-torres kernel: [   15.436033] iwlagn 0000:0c:00.0: Error 
sending REPLY_RXON: time out after 500ms.
Nov  1 19:27:02 wildi-torres kernel: [   15.436084] iwlagn 0000:0c:00.0: Error 
setting new RXON (-110)

I'm not 100% certain, but I'd say this is not good to allow your wifi
adapter to scan for networks, and once you disable/re-enable wifi it
resets state in the driver -- either through completely reloading the
driver or as an effect of the rfkill state changes.

I'm reassigning this to linux as it appears to be a driver issue. Please
re-assign this to network-manager should you find it's not a problem
with the driver.

** Package changed: network-manager (Ubuntu) => linux (Ubuntu)

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WLAN unavailable after login
https://bugs.launchpad.net/bugs/669584
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