Messages in this thread | | | Date | Fri, 11 Jun 2010 13:07:35 -0400 (EDT) | From | Len Brown <> | Subject | Re: Linux 2.6.34 causes system lockup on Compaq Presario 2200 Laptop |
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On Fri, 11 Jun 2010, Jeffrey Merkey wrote:
> Len, > > I am having trouble getting a trace of this because its down hard to > reproduce. The reason is the lockup happens before I log into the > laptop. i.e. I boot 2.6.34 and if I let the laptop just sit there is > happens. If I log in and start doing work on it, it does not seem to > happen. It's related to using the laptop on battery mode with the > charger removed. I have a 2U appliance setup I am working on today > and this frees up the laptop to try to reproduce this. The flaky > battery power misreporting was in fact accurate. The battery in that > laptop is 6 years old and does have low power. I am certain the > lockup if related though. I will try to reproduce today and setup the > trace to run after boot. I have had it sitting there for an hour and > it has not reoccurred. Let me try through today and if I cannot > reproduce, close the bug.
Good to know, Jeff.
One possibility is that the old battery is confusing the embedded controller -- possibly exposing a firmware bug. The EC, in turn, is fully capable of hanging the OS.
If you *can* reproduce it, it may be interesting to bisect recent changes to drivers/acpi/ec.c
Also, if you can reproduce it, it would be good to verify that the problem occurs only when the battery driver is loaded.
thanks, -Len
> > Please attach the output of acpidump here: > > > > https://bugzilla.kernel.org/show_bug.cgi?id=16136
We could still use this output -- note that you can capture it at any time, independent of the failure, and independent of the kernel -- as it is simply a copy of the tables that the BIOS is exporting to Linux.
thanks, -Len Brown, Intel Open Source Technology Center
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