MSI ez CPU debug led is constantly ON when resume from suspend to ram (S3) state
When the PC (running latest distribution or mainline Linux kernel - 5.18.5) wakes up from suspend to ram (S3) state, the motherboard CPU ez debug led light stay solid and does not turning off indicating CPU problem. Otherwise (at first glance) the system works as expected, also there is no ACPI error messages in dmesg. The problem seems to be Linux specific since the issue does not appears on Windows 11.
My question is how this could be diagnosed / fixed (turn light off) ?
Similar problem is reported on Reddit MSI channel: https:/
As additional info one of the processor msr -> MSR_IA32_PERF_CTL (0x199) is restored as 0x1e00 prev value: 0x800 but probably it is not related.
Description: Ubuntu 22.04 LTS
Release: 22.04
BIOS Information
Vendor: American Megatrends International, LLC.
Version: 1.10
Release Date: 03/04/2022
Base Board Information
Manufacturer: Micro-Star International Co., Ltd.
Product Name: PRO B660-A DDR4 (MS-7D59)
Processor Information
Socket Designation: U3E1
Type: Central Processor
Family: Core i5
Manufacturer: Intel(R) Corporation
Signature: Type 0, Family 6, Model 151, Stepping 5
Version: 12th Gen Intel(R) Core(TM) i5-12500
Question information
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- Ubuntu linux Edit question
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