Public bug reported:
I am reporting a power management issue on my Lenovo IdeaPad Slim 3
15ARP10 (AMD Ryzen 7 7735HS).
Symptoms:
1. 'dmesg' reports: "amd_pmc AMDI0007:00: probe with driver amd_pmc failed with
error -5".
2. SMART data for NVMe drive (nvme0n1) shows a high number of "Unsafe
Shutdowns" (49), which significantly exceeds the number of manual hard resets
I've performed.
3. Multiple ACPI BIOS Errors (AE_NOT_FOUND, AE_ALREADY_EXISTS) are present in
the boot log.
The system seems to cut power to the SSD incorrectly during normal
shutdown or suspend cycles. I have temporarily mitigated the unsafe
shutdowns by using 'nvme_core.default_ps_max_latency_us=0' in GRUB, but
the amd_pmc error persists.
Ubuntu version: 24.04 LTS
Kernel version: 6.17 (hwe)
ProblemType: Bug
DistroRelease: Ubuntu 24.04
Package: linux-image-6.17.0-14-generic 6.17.0-14.14~24.04.1
ProcVersionSignature: Ubuntu 6.17.0-14.14~24.04.1-generic 6.17.9
Uname: Linux 6.17.0-14-generic x86_64
ApportVersion: 2.28.1-0ubuntu3.8
Architecture: amd64
CasperMD5CheckResult: pass
CurrentDesktop: ubuntu:GNOME
Date: Mon Mar 2 11:40:02 2026
InstallationDate: Installed on 2026-01-19 (42 days ago)
InstallationMedia: Ubuntu 24.04.3 LTS "Noble Numbat" - Release amd64
(20250805.1)
ProcEnviron:
LANG=uk_UA.UTF-8
PATH=(custom, no user)
SHELL=/bin/bash
TERM=xterm-256color
XDG_RUNTIME_DIR=<set>
SourcePackage: linux-signed-hwe-6.17
UpgradeStatus: No upgrade log present (probably fresh install)
** Affects: linux-signed-hwe-6.17 (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug noble wayland-session
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https://bugs.launchpad.net/bugs/2143029
Title:
amd_pmc probe failed with error -5 and high Unsafe Shutdowns count on
Lenovo IdeaPad Slim 3 (Ryzen 7 7735HS)
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