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Hi James.<br>
<br>
For what it is worth I had a similar problem with 12.04 and 12.10
and found the only solution was to reinstall 12.10 and refrain from
doing any updates. <br>
13.04 works OK with all updates loaded, but I used both with a
Ubuntu One link as security until I was sure.<br>
<br>
Regards, Martin Dixon <br>
<br>
<div class="moz-cite-prefix">On 22/08/13 13:21, James Morrissey
wrote:<br>
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<div>Dear all, <br>
<br>
I am wondering if someone can help me with a major
problem that i have been having in Ubuntu, pertaining
to a notoriously hard to diagnose issue of random
freezing. <br>
<br>
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The problem started in 13.04, which would freeze
randomly, from the day i installed it. I persisted with
the issue for a while, hoping that it would work itself
out with subsequent kernel updates and as 13.04 was
patched. Unfortunately 2 months in i was still losing
work to random freezes. <br>
<br>
I thus found myself with a free weekend and so decided
to downgrade to 12.04 which had worked for me
previously. Frustratingly however, i found that the
problem now manifest there as well (there had been no
problem in 12.10 previously).<br>
<br>
</div>
A system freeze appears to happen at random, although it
is possibly related to having the machine on battery
power. When it happens I can't input anything, and if
there is a song playing it skips. Only way out is a hard
reboot. <br>
<br>
</div>
I remain on 12.04, 64 bit. I have updated my bios, and run
memtest86. The latter found no errors and the former has not
improved things. The machine is a Lenovo x131e, Intel, with
integrated graphics and broadcom wireless. <br>
<br>
</div>
I have tried filling a bug <a moz-do-not-send="true"
href="https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1174275">https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1174275</a>,
but got stuck as i could not properly test the upstream kernel
as wireless would not work. <br>
<br>
The fact that there was a wireless problem on Broadcom
BCM43228 and that the freeze appears to correlate with having
the machine on battery power (i am still testing this) means
that i thought it might be a problem with powersave on the
wireless card. There were a number of posts about this but the
general solution seemed to be to turn off the powersave option
on the card (<a moz-do-not-send="true"
href="http://robertbeal.com/1248/ubuntu-10101104-freezing-battery-power">http://robertbeal.com/1248/ubuntu-10101104-freezing-battery-power</a>).
I did this to no avail as i still got a freeze when the
machine was on battery power. <br>
<br>
I have also tried posting this problem on the forums (<a
moz-do-not-send="true"
href="http://ubuntuforums.org/showthread.php?t=2166195">http://ubuntuforums.org/showthread.php?t=2166195</a>),
providing a list or kernel errors that i get after a freeze.
Understanding this list is beyond my ability, so i don't know
where to start. I haven't had much luck with anyone there. <br>
<br>
</div>
<div>At this point i am not sure what else to do. I don't know
how to diagnose the problem any further as many forums simply
say that analysing a system freeze is difficult. This is a bit
of a massive bug for me as random system freezes really
interrupt with my daily work. <br>
<br>
</div>
<div>I'd love to get this resolved, or at least work out what
the problem is so that i can get it reported. Ideally i'd have
13.04 working, but will settle for 12.04. <br>
<br>
If anyone can give me any advice on what steps to take to work
out what the problem is, i would really appreciate it. <br>
<br>
Thanks, <br>
<br>
James. <br>
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