Investigating failed suspend/resume T61

[Adrian Chadd]

Hi,

Please also document why it is/isn't working. It's only documented as
"suspend/resume doesn't work" :)


-a


On 4 June 2014 12:46, Edward Tomasz Napierała <trasz at freebsd.org> wrote:
> Wiadomość napisana przez John Baldwin w dniu 4 cze 2014, o godz. 19:30:
>
>> On Wednesday, June 04, 2014 1:17:14 pm Edward Tomasz Napierała wrote:
>>> On 0604T0907, Sean Bruno wrote:
>>>> On Thu, 2014-05-29 at 09:30 -0400, John Baldwin wrote:
>>>>> On Thursday, May 29, 2014 9:16:41 am Sean Bruno wrote:
>>>>>> On Wed, 2014-05-28 at 18:43 -0400, Jung-uk Kim wrote:
>>>>>>> -----BEGIN PGP SIGNED MESSAGE-----
>>>>>>> Hash: SHA1
>>>>>>>
>>>>>>> On 2014-05-28 17:29:35 -0400, John Baldwin wrote:
>>>>>>>> Err, I think it enables GPE1 as otherwise ACPICA assumes GPE1 has a
>>>>>>>> length of zero (and is thus invalid)?
>>>>>>>
>>>>>>> BTW, ACPI 5.0a (page 121) says:
>>>>>>>
>>>>>>> "This is an optional field; if this register block is not supported,
>>>>>>> this field contains zero."
>>>>>>>
>>>>>>> Therefore, we must assume X_GPE1_BLK it is NOT supported.
>>>>>>>
>>>>>>> Jung-uk Kim
>>>>>>
>>>>>> So, reverting John's changes and applying yours seems to do new things
>>>>>> while not quieting the old error messages.  Perhaps this is significant?
>>>>>>
>>>>>> real memory  = 2147483648 (2048 MB)
>>>>>> avail memory = 2007089152 (1914 MB)
>>>>>> Event timer "LAPIC" quality 400
>>>>>> ACPI APIC Table: <LENOVO TP-7U   >
>>>>>> FreeBSD/SMP: Multiprocessor System Detected: 2 CPUs
>>>>>> FreeBSD/SMP: 1 package(s) x 2 core(s)
>>>>>> cpu0 (BSP): APIC ID:  0
>>>>>> cpu1 (AP): APIC ID:  1
>>>>>> ACPI BIOS Warning (bug): 32/64X length mismatch in FADT/Gpe1Block: 0/32
>>>>>> (20130823/tbfadt-601)
>>>>>> ACPI BIOS Warning (bug): Optional FADT field Gpe1Block has zero address
>>>>>> or length: 0x000000000000102C/0x0 (20130823/tbfadt-630)
>>>>>> ioapic0: Changing APIC ID to 1
>>>>>> ioapic0 <Version 2.0> irqs 0-23 on motherboard
>>>>>> random: <Software, Yarrow> initialized
>>>>>> kbd1 at kbdmux0
>>>>>> acpi0: <LENOVO TP-7U> on motherboard
>>>>>> CPU0: local APIC error 0x40
>>>>>> ACPI Error: GPE0 block (GPE 0 to 31) overlaps the GPE1 block (GPE 0 to
>>>>>> 15) - Ignoring GPE1 (20130823/evgpeinit-178)
>>>>>
>>>>> Actually, I think all these patches are changing nothing, and this actually
>>>>> points out that I misread your FADT at the first.  GPE1 should actually be
>>>>> ignored since it does in fact overlap.  Can you just try reverting all your
>>>>> changes and seeing if suspend/resume works?
>>>>>
>>>>
>>>>
>>>> Boy oh boy ... talk about a waste of time.
>>>>
>>>> trasz@ and I have the same laptop and I just confirmed with him that the
>>>> patch does nothing useful (as both of you suggested).  The *ACTUAL*
>>>> problem seems to be related to disabling devices in the Thinkpad BIOS.
>>>
>>>
>>> Yup.  The culprit seems to be the "Security -> IO Port Access -> Modem"
>>> BIOS control: setting it to disabled breaks resume; the AcpiEnterSleepState()
>>> never returns.
>>>
>>> With that option set to enabled, the suspend/resume works seems to work
>>> flawlessly on T61 with Intel graphics, with VT kernel and i915kms.ko,
>>> on 11-CURRENT/amd64 from a few days ago, without any patches or special
>>> sysctl/tunables.
>>
>> Well, document it on the wiki at least.
>
> Thanks for suggestion; done.
>
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