Laptop crashes when on battery while using wireless

Asked by Rory McKinley

Hello

I have a Dell XPS 1558 Studio laptop. If I use the version of pm-utils that ships with Natty (or with Meerkat for that matter) then after a couple of minutes on battery while using WLAN, and my laptop will freeze (no mouse, no keyboard). If I use the 1.3.0-1ubuntu1 package of pm-utils then I experience no difficulties.

This would lead me to the conclusion that there is something in the later versions of pm-utils that doesn't like my laptop. I have no idea where to start debugging this problem, but if someone is willing to point me in the direction of how to debug this problem, I am happy to do the legwork.

The Dell has a Broadcom BCM 43224 card and I am currently using the proprietary STA driver.

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Ubuntu pm-utils Edit question
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mycae (mycae) said :
#1

The most straight forward thing would be to first work out precisely which two versions do and don't work, by downloading each and every iteration between 1.3.0-1ubuntu1 and the version 1.4 that does work. This would get you part way to isolating the problem, but not all the way.

Have you done programming before?

The best way to isolate, once you have done the coarse step above, would be to slowly add-in the changes from 1.4 to 1.3, using the source package, and then rebuilding the package at each step. If there are patches that are supposed to fix things that can be removed individually, your best bet would be to migrate these one at a time.

Rebuild instructions in general:
http://www.moosechips.com/2008/09/ubuntu-rebuild-a-source-package/

This would not be trivial.

Revision history for this message
Sam_ (and-sam) said :
#2

Sounds like a regression to me.
http://changelogs.ubuntu.com/changelogs/pool/main/p/pm-utils/pm-utils_1.4.1-3/changelog
Looking through bug reports (filter newest) found
Bug #719152
Bug #656745

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