Comment 8 for bug 1005832

Indeed doesn't seem to be caused by reg domain, and I'm certain it's not just Ubuntu but just any Linux ;)

So, some things I can see from the start are three different reason codes for disconnects, which confirm that it's due to the number of APs:

reason 3 -- DEAUTH_LEAVING -- in simple, roaming to a different AP.
reason 2 -- PREV_AUTH_NOT_VALID -- previous authentication for the AP roamed *from* can't be reused. It may be on a different channel, etc.
reason 4 -- DISASSOC_DUE_TO_INACTIVITY -- (AFAIUI) the other end doesn't respond.

These put together make me believe that there is definitely an issue brought forward by how aggressively NetworkManager tries to stay on the strongest AP. However, there are also ways to mitigate this particular issue: things would likely go a lot smoother if authentication was central (WPA enterprise/RADIUS, or no encryption).

There is most likely also an issue with the iwlwifi driver itself, since we can see an oops message in the WifiSyslog file attached.

Would it be possible to also attach debugging output for wpasupplicant? Those can be sent directly to syslog as well; and we now ship a script to help enabling wpasupplicant debugging:

sudo python /usr/lib/NetworkManager/debug-helper.py --wpa debug

Thanks!