On Fri, Jun 11, 2010 at 11:07 AM, Len Brown <lenb@xxxxxxxxxx> wrote: > 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 > I can tell you for certain it does only happen when the battery driver is loaded. Still has not ocurred. Just rebooted it 15 minutes ago -- trying again. Jeff -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
