[Bug 2147274] Re: Regression: Framework audio expansion card fails after AC to battery transition (6.17.0-20)

Actually, you don't even have to switch to battery power for the audio
to stop working. Just pause the YouTube video for several minutes. Audio
will stop when attempting to resume the video. Bug was definitely
introduced with kernel 6.17.0-20-generic as when reverting to kernel
6.17.0-19-generic the audio works as expected.

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Title:
Regression: Framework audio expansion card fails after AC to battery
transition (6.17.0-20)

Status in linux package in Ubuntu:
New

Bug description:
System:
- Framework laptop (AMD)
- Using Framework audio expansion card (USB audio device)

Regression between kernel versions:
- 6.17.0-19-generic → works correctly
- 6.17.0-20-generic → broken

Steps to reproduce:
1. Boot into 6.17.0-20-generic
2. Start audio playback (e.g., YouTube in Firefox)
3. Disconnect AC power (switch to battery)

Expected result:
Audio continues working normally.

Actual result:
- Audio stops working
- Firefox creates multiple audio streams in mixer
- PipeWire becomes unstable (may hang when restarting)
- Audio device still visible via lsusb but unusable
- Unplugging/replugging audio jack does not recover device
- Reboot required to restore functionality

Additional notes:
- Issue does NOT occur on 6.17.0-19-generic under identical conditions
- Appears related to power state transition (AC → battery)
- Device remains present on USB bus but audio interface is non-functional

Workaround:
Booting into 6.17.0-19-generic avoids the issue.

ProblemType: Bug
DistroRelease: Ubuntu 25.10
Package: linux-image-6.17.0-20-generic 6.17.0-20.20
ProcVersionSignature: Ubuntu 6.17.0-20.20-generic 6.17.13
Uname: Linux 6.17.0-20-generic x86_64
ApportVersion: 2.33.1-0ubuntu3
Architecture: amd64
CasperMD5CheckResult: pass
CurrentDesktop: XFCE
Date: Sat Apr 4 11:31:59 2026
InstallationDate: Installed on 2026-03-18 (17 days ago)
InstallationMedia: Xubuntu 25.10 "Questing Quokka" - Release amd64 (20251008.1)
MachineType: Framework Laptop 16 (AMD Ryzen AI 300 Series)
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-6.17.0-20-generic root=UUID=0a1e98a4-f95b-4b83-a5c7-f3f0a2fbcc39 ro quiet splash amdgpu.dcdebugmask=0x12 usbcore.autosuspend=-1 rootdelay=3 vt.handoff=7
PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No PulseAudio daemon running, or not running as session daemon.
RelatedPackageVersions:
firmware-sof N/A
linux-firmware 20250901.git993ff19b-0ubuntu1.9
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 03/13/2026
dmi.bios.release: 3.5
dmi.bios.vendor: INSYDE Corp.
dmi.bios.version: 03.05
dmi.board.asset.tag: *
dmi.board.name: FRANMHCP09
dmi.board.vendor: Framework
dmi.board.version: A9
dmi.chassis.asset.tag: FRAGAJCPA955010025
dmi.chassis.type: 10
dmi.chassis.vendor: Framework
dmi.chassis.version: A9
dmi.modalias: dmi:bvnINSYDECorp.:bvr03.05:bd03/13/2026:br3.5:svnFramework:pnLaptop16(AMDRyzenAI300Series):pvrA9:rvnFramework:rnFRANMHCP09:rvrA9:cvnFramework:ct10:cvrA9:skuFRAGAJCP09:
dmi.product.family: Laptop 16
dmi.product.name: Laptop 16 (AMD Ryzen AI 300 Series)
dmi.product.sku: FRAGAJCP09
dmi.product.version: A9
dmi.sys.vendor: Framework

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