I think what would help most now is to collect a trace of mac80211 and
iwlwifi when this problem happens. This might be a bit tricky since the
trace will potentially collect a lot of data and it sounds like the
problem isn't deterministic. You may want to restart the trace
periodically while you aren't seeing the issue to keep the trace from
growing too large.
To start tracing, install the trace-cmd package and run the following
commands:
$ echo 32768 | sudo tee /sys/kernel/debug/tracing/buffer_size_kb
$ sudo trace-cmd record -e mac80211 -e mac80211_msg -e iwlwifi -e iwlwifi_msg
The second command will run until you press Ctrl+C. To restart trace
collection just kill trace-cmd and restart it.
You'll need to start tracing in a terminal and leave it running while
the issue happens. Afterward, kill trace-cmd, and you will have a
trace.dat file in whatever directory you ran trace-cmd from. Compress
trace.dat and capture dmesg, then either attach them here or put them
somwhere where I can get at them.
Thanks!
** Changed in: linux (Ubuntu)
Status: Confirmed => Incomplete
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https://bugs.launchpad.net/bugs/1126495
Title:
wifi disconnects randomly when using N connection
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