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Date: Tue, 10 Jun 2008 07:59:33 +0200 From: Takashi Iwai <tiwai@...e.de> To: "Daniel J Blueman" <daniel.blueman@...il.com> Cc: "Linux Kernel" <linux-kernel@...r.kernel.org> Subject: Re: ALC883 recording troubles... At Mon, 9 Jun 2008 20:59:00 +0100, Daniel J Blueman wrote: > > Hi Takashi-san, > > I'm experiencing DC offset with the microphone on 2.6.24 (Ubuntu 8.04 > LTS x86-64). I can see on Audacity that the DC offset that varies with > the recording capture level. Could you elaborate? The mic bias level could be changed via the pin control value. Usually, it's set as VREF 80%. > Plus, the mixer playback->mic-boost > muting enables/disables mic-boost in recording. This is a known bug in alsa-lib mixer abstraction. No kernel issue. > It feels like the ALC883 pins aren't configured quite right. The mobo > is an Asus P5E-VM with current BIOS [1] > > What's the routine to debug this? Would it help to install windows, > dump the register space and compare? You can find *.INI file that contains the default pin configuration in Windows. This might be useful in the case BIOS is broken but Windows does a black magic. Anyway, please run alsa-info.sh with --no-upload option and show the generated file here. It contains the codec information and mixer setup. http://hg.alsa-project.org/alsa/raw-file/tip/alsa-info.sh Also, you can adjust the pin setting on the fly via hda-verb utility below: http://ftp.suse.com/pub/people/tiwai/misc/hda-verb-0.2.tar.bz2 Don't forget to build snd-hda-intel module with CONFIG_SND_HDA_HWDEP=y to use this command. Takashi > > Thanks in advance, > Daniel > > --- [1] > > $ sudo lspci -vvvxxxs 0:1b.0 > 00:1b.0 Audio device: Intel Corporation 82801I (ICH9 Family) HD Audio > Controller (rev 02) > Subsystem: ASUSTeK Computer Inc. Unknown device 829f > Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- > Stepping- SERR- FastB2B- > Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- > <TAbort- <MAbort- >SERR- <PERR- > Latency: 0, Cache Line Size: 32 bytes > Interrupt: pin A routed to IRQ 22 > Region 0: Memory at fe9f8000 (64-bit, non-prefetchable) [size=16K] > Capabilities: [50] Power Management version 2 > Flags: PMEClk- DSI- D1- D2- AuxCurrent=55mA PME(D0+,D1-,D2-,D3hot+,D3cold+) > Status: D0 PME-Enable- DSel=0 DScale=0 PME- > Capabilities: [60] Message Signalled Interrupts: Mask- 64bit+ Queue=0/0 Enable- > Address: 0000000000000000 Data: 0000 > Capabilities: [70] Express Unknown type IRQ 0 > Device: Supported: MaxPayload 128 bytes, PhantFunc 0, ExtTag- > Device: Latency L0s <64ns, L1 <1us > Device: Errors: Correctable- Non-Fatal- Fatal- Unsupported- > Device: RlxdOrd- ExtTag- PhantFunc- AuxPwr- NoSnoop+ > Device: MaxPayload 128 bytes, MaxReadReq 128 bytes > Link: Supported Speed unknown, Width x0, ASPM unknown, Port 0 > Link: Latency L0s <64ns, L1 <1us > Link: ASPM Disabled CommClk- ExtSynch- > Link: Speed unknown, Width x0 > 00: 86 80 3e 29 06 00 10 00 02 00 03 04 08 00 00 00 > 10: 04 80 9f fe 00 00 00 00 00 00 00 00 00 00 00 00 > 20: 00 00 00 00 00 00 00 00 00 00 00 00 43 10 9f 82 > 30: 00 00 00 00 50 00 00 00 00 00 00 00 0f 01 00 00 > 40: 01 00 00 07 00 00 00 00 00 00 00 00 00 00 00 00 > 50: 01 60 42 c8 00 00 00 00 00 00 00 00 00 00 00 00 > 60: 05 70 80 00 00 00 00 00 00 00 00 00 00 00 00 00 > 70: 10 00 91 00 00 00 00 10 00 08 10 00 00 00 00 00 > 80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 > 90: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 > a0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 > b0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 > c0: 00 04 00 01 00 00 00 00 31 00 a3 02 00 00 00 00 > d0: 61 00 a3 02 00 00 00 00 00 00 00 00 00 00 00 00 > e0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 > f0: 00 00 00 00 00 00 00 00 86 0f 02 00 00 00 00 00 > > $ aplay -l > **** List of PLAYBACK Hardware Devices **** > card 0: Intel [HDA Intel], device 0: ALC883 Analog [ALC883 Analog] > Subdevices: 1/1 > Subdevice #0: subdevice #0 > card 0: Intel [HDA Intel], device 1: ALC883 Digital [ALC883 Digital] > Subdevices: 1/1 > Subdevice #0: subdevice #0 > card 0: Intel [HDA Intel], device 3: ATI HDMI [ATI HDMI] > Subdevices: 1/1 > Subdevice #0: subdevice #0 > card 2: HDMI [HDA ATI HDMI], device 3: ATI HDMI [ATI HDMI] > Subdevices: 1/1 > Subdevice #0: subdevice #0 > daniel@...ron:~$ aplay -L > default:CARD=Intel > HDA Intel, ALC883 Analog > Default Audio Device > front:CARD=Intel,DEV=0 > HDA Intel, ALC883 Analog > Front speakers > surround40:CARD=Intel,DEV=0 > HDA Intel, ALC883 Analog > 4.0 Surround output to Front and Rear speakers > surround41:CARD=Intel,DEV=0 > HDA Intel, ALC883 Analog > 4.1 Surround output to Front, Rear and Subwoofer speakers > surround50:CARD=Intel,DEV=0 > HDA Intel, ALC883 Analog > 5.0 Surround output to Front, Center and Rear speakers > surround51:CARD=Intel,DEV=0 > HDA Intel, ALC883 Analog > 5.1 Surround output to Front, Center, Rear and Subwoofer speakers > surround71:CARD=Intel,DEV=0 > HDA Intel, ALC883 Analog > 7.1 Surround output to Front, Center, Side, Rear and Woofer speakers > null > Discard all samples (playback) or generate zero samples (capture) > default:CARD=U0x46d0x990 > USB Device 0x46d:0x990, USB Audio > Default Audio Device > front:CARD=U0x46d0x990,DEV=0 > USB Device 0x46d:0x990, USB Audio > Front speakers > surround40:CARD=U0x46d0x990,DEV=0 > USB Device 0x46d:0x990, USB Audio > 4.0 Surround output to Front and Rear speakers > surround41:CARD=U0x46d0x990,DEV=0 > USB Device 0x46d:0x990, USB Audio > 4.1 Surround output to Front, Rear and Subwoofer speakers > surround50:CARD=U0x46d0x990,DEV=0 > USB Device 0x46d:0x990, USB Audio > 5.0 Surround output to Front, Center and Rear speakers > surround51:CARD=U0x46d0x990,DEV=0 > USB Device 0x46d:0x990, USB Audio > 5.1 Surround output to Front, Center, Rear and Subwoofer speakers > surround71:CARD=U0x46d0x990,DEV=0 > USB Device 0x46d:0x990, USB Audio > 7.1 Surround output to Front, Center, Side, Rear and Woofer speakers > iec958:CARD=U0x46d0x990,DEV=0 > USB Device 0x46d:0x990, USB Audio > IEC958 (S/PDIF) Digital Audio Output > front:CARD=HDMI > HDA ATI HDMI > Front speakers > surround40:CARD=HDMI > HDA ATI HDMI > 4.0 Surround output to Front and Rear speakers > surround41:CARD=HDMI > HDA ATI HDMI > 4.1 Surround output to Front, Rear and Subwoofer speakers > surround50:CARD=HDMI > HDA ATI HDMI > 5.0 Surround output to Front, Center and Rear speakers > surround51:CARD=HDMI > HDA ATI HDMI > 5.1 Surround output to Front, Center, Rear and Subwoofer speakers > surround71:CARD=HDMI > HDA ATI HDMI > 7.1 Surround output to Front, Center, Side, Rear and Woofer speakers > -- > Daniel J Blueman > -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More 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