https://bugzilla.kernel.org/show_bug.cgi?id=219421
Bug ID: 219421
Summary: S0ix: RPL-P LG Gram unable to enter s0ix due to
faulty(?) CSME/MEI
Product: ACPI
Version: 2.5
Hardware: Intel
OS: Linux
Status: NEW
Severity: normal
Priority: P3
Component: Power-Sleep-Wake
Assignee: [email protected]
Reporter: [email protected]
Regression: No
Hi, first time reporting a kernel bug so let me know if I need to attach
anything else.
Recently my LG Gram (16T90R-K.ADB9U1, i7-1360p) started having problems with
Management Engine, possibly because Windows or LG Update did something while I
was logged into Windows 11. The first symptom was SOF firmware not loading, but
I "fixed" that by resetting BIOS to default settings and am unable to reproduce
it now. Windows 11 also reacted by logging me out of my Microsoft Account.
Now I'm noticing that Linux can't enter s0ix/s2idle with this problem, and it's
now draining ~4%/hour or ~3W while sleeping. I confirmed it with
S0ixSelftestTool on many different kernels ranging from 6.7-11 to the current
LTS 6.6 and the current mainline 6.12rc4, with a few firmware and microcode
versions, and also a few live distros. The first `s0ix-selftest-tool.sh -s` run
terminates on "LTR ignore 6", and the second run complains about CSME_PG_STS.
I also ran powercfg /SleepStudy on Windows 11. It's also complaining about
NoHwDrips.C8.LTR_ME (which is LTR 6), but it seems to be still correctly
entering sleep and consuming a more reasonable 660mW.
Unfortunately my LG Gram is cursed with an AMI AptIO BIOS so there are no
options for me to fiddle around with. For now I'm able to work around this by
going into S3 deep sleep instead (which has its own quirks with iwlwifi), but I
figured I should file a bug, especially since Windows seems to know how to work
around it.
The closest bug I've found is https://bugs.launchpad.net/intel/+bug/1744638,
but it doesn't quite fit the bill.
Attachments below:
* s0ix-selftest-tool.sh -s # two runs
* journalctl -b | grep -Pi
'kernel|intel|acpi|bios|(lg.laptop)|PM:|csme|mei|s0ix|s2idle' # with
intel_pmc_core.warn_on_s0ix_failures=1
* dmesg # with intel_pmc_core.warn_on_s0ix_failures=1
* acpidump before s0ix tests gzipped
* acpidump after s0ix tests gzipped
* lspci -vvvv
* lshw
* intel_csme_version_detection_tool
* powercfg.exe /SleepStudy
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