You might as well check if bugzilla.kernel.org bug #5534 is related to your problem. Enabling ACPI_DEBUG 1. you enable ACPI debugging in ACPI menu of kernel config 2. you write different values to /proc/acpi/acpi_debug_layer and acpi_debug_level. Regards, Alex. Eric Anderson wrote: > I've been trying to figure out what is going wrong with Linux ACPI > support on the HP nw9440. One of the problems that I've had is that > when the AC adapter is removed, the acpi status doesn't get updated. > I have discovered that if I boot with 2.6.14, wait for it to hang, and > then reboot with 2.6.17.7, I have functional notification of the AC > adapter state changes. > > I'm attempting to work out what the difference is between these two > runs, and I have found a first difference that in the non-working > case, acpi_ex_opcode_2A_0T_0R is called which queues a deferred > execution, and prints out the message "bus_get_device: No context for > object [...]". In the working case, that path is never executed. > > I'm trying to figure out what the difference is between the AML that > gets executed along the two paths, and near as I can tell, if I could > enable ACPI_DEBUGGER, I would get the trace of executed AML, and I > could start working out what is going wrong. However, I can't find > any kernel config option to enable ACPI_DEBUGGER, and all of my google > searches around that haven't found anything that describes how it > should work, nor has wandering around the acpi4linux wiki, other > acpi4linux web pages, nor the mailing list archives. > > I therefore have three questions: > a) what is the proper way to enable ACPI_DEBUGGER option > b) will it print out a trace of executed AML as I'm expecting > c) is there some other debugging path that I should be trying to get > this to work? > > Thanks, please CC me directly as I'm not subscribed to the linux-acpi > mailing list. > -Eric > > - > 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 > - 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
