[coreboot] More ACPI errors on Lenovo X201i

Matthias Gazzari mail at qtux.eu
Tue Jul 31 22:00:03 CEST 2018

Hi Patrick,

commit "dbf5a5d0f8 ec/lenovo/h8/acpi: Fix ACPI error in _INI" fixed the
issue during boot, thank you.

Regarding the stub driver, I have no idea on where to start. If you
think it is worth your time and easy enough as an entry level task, I
would like to ask for some guidance and/or hints to something similar in
the code tree in order to get an idea on how to implement this feature.
If not, I will wait for your driver implementation as the issue seems to
be non-critical so far.


On 24/07/18 09:04, Patrick Rudolph wrote:
> Hi Matthias,
> On 2018-07-23 03:32 PM, Matthias Gazzari wrote:
>> Hi Patrick,
>> I found new ACPI errors on my Lenovo X201i:
>> commit "60eca531df ec/lenovo/h8/acpi: Add WWAN ACPI methods" introduces
>> the following error just before shutdown:
>> thinkpad_acpi_ acpi_evalf(\WGSV, vd, ...) failed: AE_NOT_FOUND
> Is expected, as the method doesn't exists in coreboot.
> I'm working on a cmos acpi driver, allowing easy integration of that
> method.
> If you want you can implement a stub driver (emtpy function) in the
> meantime.
>> and commit "31fb846c59 ec/lenovo/h8/acpi: Apply state on wake"
>> introduces the following errors on boot:
>> ACPI Error: No handler for Region [ERAM] (        (ptrval))
>> [EmbeddedControl] (20180313/evregion-132)
>> ACPI Error: Region EmbeddedControl (ID=3) has no handler
> I've no idea what the problem is.
> Is there an ACPI expert here ?
>> (20180313/exfldio-265)
>> ACPI Error: Method parse/execution failed \_SB.PCI0.LPCB.EC.HKEY._INI,
>> AE_NOT_EXIST (20180313/psparse-516)
>> ACPI Error: AE_NOT_EXIST, during \_SB.PCI0.LPCB.EC.HKEY._INI execution
>> (20180313/nsinit-670)
>> Cheers,
>> Matthias
> Regards,
> Patrick

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