Re: My AlderLake Dell (XPS-9320) needs these patches to get full standby/low-power modes

[Kenneth Crudup <kenny@panix.com>]

Seems to be working OK, I do think running power states seem to be 
spending more time in pc10/cpuLPI/SysLPI, but that's just 
seat-of-the-pants though.

While-suspended battery drain seems about the same, however:

----
[E130] 518 /home/kenny> cat /tmp/battery-levels
suspend-in:  Wed, 17 Jul 2024 09:33:33 -0700
/sys/power/wakeup_count:46
/sys/power/suspend_stats/success:0
/sys/class/power_supply/BAT0/charge_full:3882000
/sys/class/power_supply/BAT0/capacity:100
/sys/class/power_supply/BAT0/voltage_now:12856000
/sys/class/power_supply/BAT0/status:Full
/sys/class/power_supply/BAT0/capacity_level:Full
/sys/devices/system/cpu/cpuidle/low_power_idle_system_residency_us:0
/sys/kernel/debug/pmc_core/slp_s0_residency_usec:0
----------
suspend-out: Wed, 17 Jul 2024 16:38:37 -0700
/sys/kernel/debug/pmc_core/slp_s0_residency_usec:0
/sys/devices/system/cpu/cpuidle/low_power_idle_system_residency_us:0
/sys/class/power_supply/BAT0/charge_full:3882000
/sys/class/power_supply/BAT0/capacity:89
/sys/class/power_supply/BAT0/voltage_now:12206000
/sys/class/power_supply/BAT0/status:Discharging
/sys/class/power_supply/BAT0/capacity_level:Normal
/sys/power/suspend_stats/success:1
/sys/power/wakeup_count:52
==================================================

[17/16:44:11 kenny@xps-9320]
----

On 7/16/24 18:59, Kai-Heng Feng wrote:
> Hi Kenneth,
> 
> On Tue, Jul 16, 2024 at 2:27 AM Kenneth Crudup <kenny@panix.com> wrote:
>>
>>
>> No joy yet for 6.10, so here's my patches, maybe it'll save someone some
>> time (they're pretty much the same as 6.9) .
>>
>> Fingers crossed for 6.11!
> 
> I forgot to Cc you when I sent the patch [0].
> 
> It will be great if you can test it out.
> 
> [0] https://lore.kernel.org/linux-pci/20240530085227.91168-1-kai.heng.feng@canonical.com/
> 
> Kai-Heng
> 
>>
>> -Kenny
>>
>> On 3/21/24 03:12, Kai-Heng Feng wrote:
>>> Hi Kenneth,
>>>
>>> On Tue, Mar 12, 2024 at 10:37 AM Kenneth R. Crudup <kenny@panix.com> wrote:
>>>>
>>>>
>>>> On Sat, 4 Nov 2023, Kenneth R. Crudup wrote:
>>>>
>>>>> The only release kernel that was able to get this laptop to fully get into
>>>>> low-power (unfortunately only s0ix) was the Ubuntu-6.2.0- ... series from Ubuntu
>>>>
>>>>> I'd bisected it to the following commits:
>>>>> 4ff116d0d5fd PCI/ASPM: Save L1 PM Substates Capability for suspend/resume
>>>>> 5e85eba6f50d PCI/ASPM: Refactor L1 PM Substates Control Register programming
>>>>> 1a0102a08f20 UBUNTU: SAUCE: PCI/ASPM: Enable ASPM for links under VMD domain
>>>>> 47c7bfd31514 UBUNTU: SAUCE: PCI/ASPM: Enable LTR for endpoints behind VMD
>>>>> 154d48da2c57 UBUNTU: SAUCE: vmd: fixup bridge ASPM by driver name instead
>>>>
>>>> Since (for what I'm sure is a good reason ... I hope :) ) this has yet to make
>>>> it into mainline, here's the set of commits refactored for v6.8; maybe someone
>>>> scanning the archives for a solution to their Dell draining too much power can
>>>> use them.
>>>>
>>>> But is there anything I can do to help these go in? I saw that "Refactor L1
>>>> PM Substates Control Register programming" is still reverted, is that still
>>>> an issue on the machine it affected?
>>>
>>> Let me work on this.
>>>
>>> I think both VMD and Thunderbolt devices need ASPM enabled by default
>>> regardless of BIOS setting, but I am not sure if PCI folks will like
>>> the idea.
>>>
>>> Kai-Heng
>>>
>>>>
>>>>           -Kenny
>>>>
>>>> --
>>>> Kenneth R. Crudup / Sr. SW Engineer, Scott County Consulting, Orange County CA
>>>
>>
>> --
>> Kenneth R. Crudup / Sr. SW Engineer, Scott County Consulting, Orange
>> County CA
> 

-- 
Kenneth R. Crudup / Sr. SW Engineer, Scott County Consulting, Orange 
County CA