[Bug 2141725] Re: Boot freezes unless amdgpu.runpm=0 on Lenovo IdeaPad Slim 3 (Phoenix / Radeon 740M)

Repro: Boot often freezes at Ubuntu splash unless kernel parameter amdgpu.runpm=0 is set.
Workaround: Setting amdgpu.runpm=0 allows reliable boot on kernel 6.8.0-100 on Lenovo IdeaPad Slim 3 (Phoenix / Radeon 740M).
Note: Newer kernel 6.17.x freezes without workaround.

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Title:
Boot freezes unless amdgpu.runpm=0 on Lenovo IdeaPad Slim 3 (Phoenix /
Radeon 740M)

Status in linux package in Ubuntu:
New

Bug description:
Hardware: Lenovo IdeaPad Slim 3 (AMD Phoenix APU / Radeon 740M iGPU)
OS: Ubuntu 24.04 (noble)

Problem: Boot freezes at splash / during graphics initialization unless I add:
amdgpu.runpm=0

Working boot:
Kernel: 6.8.0-100-generic
Cmdline:
BOOT_IMAGE=/boot/vmlinuz-6.8.0-100-generic root=UUID=4abf7f37-781f-46e4-96c5-19c535d4b042 ro quiet splash amdgpu.runpm=0 vt.handoff=7

Repro:
- Boot kernel 6.17.0-14-generic WITHOUT amdgpu.runpm=0 -> freezes at splash.
- Boot kernel 6.17.0-14-generic WITH amdgpu.runpm=0 -> boots.

Request: Please triage as an AMDGPU runtime power management issue on
Phoenix causing boot hang. Workaround is amdgpu.runpm=0.

ProblemType: Bug
DistroRelease: Ubuntu 24.04
Package: linux-image-6.8.0-100-generic 6.8.0-100.100
ProcVersionSignature: Ubuntu 6.8.0-100.100-generic 6.8.12
Uname: Linux 6.8.0-100-generic x86_64
ApportVersion: 2.28.1-0ubuntu3.8
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC1: kikoone 3427 F.... wireplumber
/dev/snd/controlC0: kikoone 3427 F.... wireplumber
/dev/snd/seq: kikoone 3422 F.... pipewire
CRDA: N/A
CasperMD5CheckResult: pass
CurrentDesktop: ubuntu:GNOME
Date: Thu Feb 12 21:48:30 2026
InstallationDate: Installed on 2026-01-17 (26 days ago)
InstallationMedia: Ubuntu 24.04.3 LTS "Noble Numbat" - Release amd64 (20250805.1)
IwConfig:
lo no wireless extensions.

enx000ec6793106 no wireless extensions.
MachineType: LENOVO 83KA
ProcEnviron:
LANG=en_US.UTF-8
PATH=(custom, no user)
SHELL=/bin/bash
TERM=xterm-256color
XDG_RUNTIME_DIR=<set>
ProcFB: 0 amdgpudrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-6.8.0-100-generic root=UUID=4abf7f37-781f-46e4-96c5-19c535d4b042 ro quiet splash amdgpu.runpm=0 vt.handoff=7
RelatedPackageVersions:
linux-restricted-modules-6.8.0-100-generic N/A
linux-backports-modules-6.8.0-100-generic N/A
linux-firmware 20240318.git3b128b60-0ubuntu2.23
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 10/20/2025
dmi.bios.release: 1.26
dmi.bios.vendor: LENOVO
dmi.bios.version: QACN26WW
dmi.board.asset.tag: No Asset Tag
dmi.board.name: LNVNB161216
dmi.board.vendor: LENOVO
dmi.board.version: SDK0T76463WIN
dmi.chassis.asset.tag: No Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: IdeaPad Slim 3 15AHP10
dmi.ec.firmware.release: 1.23
dmi.modalias: dmi:bvnLENOVO:bvrQACN26WW:bd10/20/2025:br1.26:efr1.23:svnLENOVO:pn83KA:pvrIdeaPadSlim315AHP10:rvnLENOVO:rnLNVNB161216:rvrSDK0T76463WIN:cvnLENOVO:ct10:cvrIdeaPadSlim315AHP10:skuLENOVO_MT_83KA_BU_idea_FM_IdeaPadSlim315AHP10:
dmi.product.family: IdeaPad Slim 3 15AHP10
dmi.product.name: 83KA
dmi.product.sku: LENOVO_MT_83KA_BU_idea_FM_IdeaPad Slim 3 15AHP10
dmi.product.version: IdeaPad Slim 3 15AHP10
dmi.sys.vendor: LENOVO

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