Did not disect to the bottom - released version 3.16.0-28 corrects the
problem, so I assume that someone beat me to it.
Fixed and verified over the last few days by switching back and forth
between -25 and -28. Wifi keeps dropping in -25, and stays stable
overnight in -28.
** Changed in: linux
Status after a few iterations, again in the hope that this can be useful
to someone:
~/linux$ git bisect log
git bisect start
# good: [1860e379875dfe7271c649058aeddffe5afd9d0d] Linux 3.15
git bisect good 1860e379875dfe7271c649058aeddffe5afd9d0d
# bad: [19583ca584d6f574384e17fe7613dfaeadcdc4a6]
Thanks. I would still like to point out that the list
http://people.canonical.com/~kernel/info/kernel-version-map.html is not
up to date regarding kernel version 3.16-ubuntu, and that updating it
could have saved some compilation hours in this case.
However, Vanilla 3.15 fails with the same error
I have set up the git tree and successfully compiled and installed a few
vanilla kernels. However, it seems that even the vanilla 3.16 also works
- no dropouts in the last few evenings, where the Ubuntu 3.16.0.25 drops
several times per hour.
I have tried to find the correspondence between the
Niels Holmgaard, you would need to test the kernels in the mainline list
until you either find a known bad one, or you are well behind the 3.16
version.
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FYI, I seem to have this problem with my Dell XPS 13 (2014 Ubuntu
Developer's Edition). This also has the Intel wifi chipset (Intel(R)
Dual Band Wireless AC 7260, REV=0x144). I had the same error messages
and very similar overall behavior.
I updated to the latest mainline kernel as suggested and
Joey Richards, thank you for your comment. So your hardware and problem may be
tracked, could you please file a new report with Ubuntu by executing the
following in a terminal while booted into the default Ubuntu kernel (not a
mainline one) via:
ubuntu-bug linux
For more on this, please read
I have been running 3.18 RC6 the last days with no drop-outs. Added the
tags as requested.
** Tags added: kernel-fixed-upstream kernel-fixed-
upstream-3.18.0-031800rc6
** Changed in: linux (Ubuntu)
Status: Incomplete = Confirmed
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Niels Holmgaard, the next step is to fully reverse commit bisect from
kernel 3.16 to 3.18-rc6 in order to identify the last bad commit,
followed immediately by the first good one. Once this commit has been
identified, then it may be reviewed as a candidate for backporting into
your release. Could
- but connection dropped twice while compiling this bug report. That is
unusual, though - I now experience two or three drop-outs per day,
before changing away from the most congested channel, I had at least one
per hour.
The neighborhood is very crowded in the 2.4 GHz band.
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Niels Holmgaard, thank you for reporting this and helping make Ubuntu
better. Could you please test the latest upstream kernel available from
the very top line at the top of the page (the release names are
irrelevant for testing, and please do not test the daily folder)
following
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