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

Public bug reported:

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

** Affects: linux (Ubuntu)
Importance: Undecided
Status: New


** Tags: amd64 apport-bug questing

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https://bugs.launchpad.net/bugs/2147274

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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