Public bug reported:
The embedded HDA Intel sound card on Mac Mini is not always available when the
boot sequence enters rc.local: attempts to access the device there (e.g. via
aplay) often fail.
My current workaround is to wait for the PCM devices (/proc/asound/card0/pcm0p,
/proc/asound/card0/pcm0c) in a check-sleep-check loop before launching the
aplay command.
The card always comes up in the end, so it looks like the card driver needs
just a little more time to properly complete initialization.
ProblemType: Bug
DistroRelease: Ubuntu 11.04
Package: linux-image (not installed)
ProcVersionSignature: Ubuntu 2.6.38-8.42-generic-pae 2.6.38.2
Uname: Linux 2.6.38-8-generic-pae i686
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.23.
Architecture: i386
AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/by-path',
'/dev/snd/controlC0', '/dev/snd/hwC0D0', '/dev/snd/pcmC0D0c',
'/dev/snd/pcmC0D0p', '/dev/snd/pcmC0D1c', '/dev/snd/pcmC0D1p', '/dev/snd/seq',
'/dev/snd/timer'] failed with exit code 1:
CRDA: Error: [Errno 2] No such file or directory
Card0.Amixer.info:
Card hw:0 'Intel'/'HDA Intel at 0x90440000 irq 43'
Mixer name : 'SigmaTel STAC9221 A1'
Components : 'HDA:83847680,106b0800,00103401'
Controls : 19
Simple ctrls : 11
Date: Thu Sep 15 10:58:18 2011
HibernationDevice: RESUME=UUID=e6e1a277-448b-4cfb-8108-d8335a0adfea
MachineType: Apple Computer, Inc. Macmini1,1
ProcEnviron:
SHELL=/bin/bash
LANG=en_US.UTF-8
LC_CTYPE=it_IT.UTF-8
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.38-8-generic-pae
root=UUID=be2e3f09-d7f7-4378-85f4-fef7e4c20c37 ro
RelatedPackageVersions:
linux-restricted-modules-2.6.38-8-generic-pae N/A
linux-backports-modules-2.6.38-8-generic-pae N/A
linux-firmware 1.52.1
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 10/12/06
dmi.bios.vendor: Apple Computer, Inc.
dmi.bios.version: MM11.88Z.0055.B08.0610121326
dmi.board.asset.tag: Base Board Asset Tag
dmi.board.name: Mac-F4208EC8
dmi.board.vendor: Apple Computer, Inc.
dmi.board.version: PVT
dmi.chassis.asset.tag: Asset Tag
dmi.chassis.type: 4
dmi.chassis.vendor: Apple Computer, Inc.
dmi.chassis.version: Mac-F4208EC8
dmi.modalias:
dmi:bvnAppleComputer,Inc.:bvrMM11.88Z.0055.B08.0610121326:bd10/12/06:svnAppleComputer,Inc.:pnMacmini1,1:pvr1.0:rvnAppleComputer,Inc.:rnMac-F4208EC8:rvrPVT:cvnAppleComputer,Inc.:ct4:cvrMac-F4208EC8:
dmi.product.name: Macmini1,1
dmi.product.version: 1.0
dmi.sys.vendor: Apple Computer, Inc.
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Tags: apport-bug i386 natty
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https://bugs.launchpad.net/bugs/850751
Title:
Intel hda sound card unavailable right after boot on mac mini
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