| Date | Wed, 05 Sep 2007 22:11:20 +0200 | From | Takashi Iwai <> | Subject | Re: 2.6.23-rc4-mm1 - git-alsa.patch breaks audio on Dell Latitude D820 |
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At Wed, 05 Sep 2007 15:46:34 -0400, Valdis.Kletnieks@vt.edu wrote: > > On Fri, 31 Aug 2007 21:58:22 PDT, Andrew Morton said: > > ftp://ftp.kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2.6.23-rc4/2.6.23-rc4-mm1/ > > git-alsa.patch breaks audio on my laptop, worked fine in -rc3-mm1. Almost > certainly bustification in the Intel HDA rewrite. > > Symptoms: alsamixer finds the chipset, can adjust the volumes and mute/unmute, > and /usr/bin/play is able to write a .wav to the ALSA device without complaint. > However, no sound actually comes out. Very "lights are on but nobody is home". > > Dell Latitude D820, lspci reports: > > 00:1b.0 Audio device: Intel Corporation 82801G (ICH7 Family) High Definition Audio Controller (rev 01) > and alsamixer reports finding a "SigmaTel STAC9200" > > % grep HDA_ .config > CONFIG_SND_HDA_INTEL=y > # CONFIG_SND_HDA_HWDEP is not set > CONFIG_SND_HDA_CODEC_REALTEK=y > CONFIG_SND_HDA_CODEC_ANALOG=y > CONFIG_SND_HDA_CODEC_SIGMATEL=y > # CONFIG_SND_HDA_CODEC_VIA is not set > # CONFIG_SND_HDA_CODEC_ATIHDMI is not set > # CONFIG_SND_HDA_CODEC_CONEXANT is not set > # CONFIG_SND_HDA_CODEC_CMEDIA is not set > # CONFIG_SND_HDA_CODEC_SI3054 is not set > CONFIG_SND_HDA_GENERIC=y > # CONFIG_SND_HDA_POWER_SAVE is not set > > dmesg under -rc4-mm1: > Advanced Linux Sound Architecture Driver Version 1.0.14 (Fri Jul 20 09:12:58 2007 UTC). > ACPI: PCI Interrupt 0000:00:1b.0[A] -> GSI 21 (level, low) -> IRQ 21 > hda_intel: position_fix set to 1 for device 1028:01cc > ALSA device list: > #0: HDA Intel at 0xefffc000 irq 506 > > dmesg under -rc3-mm1: > > Advanced Linux Sound Architecture Driver Version 1.0.14 (Fri Jul 20 09:12:58 2007 UTC). > ACPI: PCI Interrupt 0000:00:1b.0[A] -> GSI 21 (level, low) -> IRQ 21 > hda_intel: position_fix set to 1 for device 1028:01cc > ALSA device list: > #0: HDA Intel at 0xefffc000 irq 506 > > (Yes, they look the same to me, too...) > > I'd provide more info, if I had a clue what else to add...
First, check /proc/asound/card0/codec#* whether STAC9200 is identified properly? If yes, check the mixer contents (at best, run "alsactl -f somefile store"), see whether "Master Playback Volume" is raised, "Master Playback Switch" unmuted, "Front..." raised/unmuted, and "PCM ..." raised/unmuted, etc.
If this still doesn't work, try to give model=ref option to snd-hda-intel. If it still not OK, please try bi-sect of git.kernel.org/perex/alsa.git mm branch...
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