[ubuntu-uk] Problems with a freezing machine: All kernels in 12.04 and 13.04

Martin Dixon mh.dixon at btinternet.com
Thu Aug 22 12:46:59 UTC 2013

Hi James.

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. 
13.04 works OK with all updates loaded, but I used both with a Ubuntu
One link as security until I was sure.

Regards, Martin Dixon

On 22/08/13 13:21, James Morrissey wrote:
> Dear all,
> 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.
> 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.
> 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).
> 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.
> 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.
> I have tried filling a bug
> https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1174275, but got
> stuck as i could not properly test the upstream kernel as wireless
> would not work.
> 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
> (http://robertbeal.com/1248/ubuntu-10101104-freezing-battery-power). I
> did this to no avail as i still got a freeze when the machine was on
> battery power.
> I have also tried posting this problem on the forums
> (http://ubuntuforums.org/showthread.php?t=2166195), 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.
> 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.
> 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.
> If anyone can give me any advice on what steps to take to work out
> what the problem is, i would really appreciate it.
> Thanks,
> James. 

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