Bugzilla – Bug 740118
No sound with VIA VT1802 codec
Last modified: 2012-01-23 10:01:53 UTC
User-Agent: Opera/9.80 (X11; Linux x86_64; U; ru) Presto/2.10.229 Version/11.60 I have asus u30sd laptop. Sound does not play from laptop speakers, but it does from headphone out (very quiet and distorted, although). Recordings from microphone are also too quiet and sound ugly. Same problem seems to present with kernel 3.2 from obs:Kernel repository, but used to work fine in openSUSE 11.4 with 3.0 kernel. HDMI out works fine. Reproducible: Always Steps to Reproduce: 1. make sure u r using vt1802 2. start any program which plays sounds # grep Codec /proc/asound/card*/codec* /proc/asound/card0/codec#0:Codec: VIA VT1802 /proc/asound/card0/codec#3:Codec: Intel CougarPoint HDMI --------- # lspci | grep Audio 00:1b.0 Audio device: Intel Corporation 6 Series/C200 Series Chipset Family High Definition Audio Controller (rev 05) --------- # hwinfo --sound 13: PCI 1b.0: 0403 Audio device [Created at pci.319] Unique ID: u1Nb.8z5fa5aeCX3 SysFS ID: /devices/pci0000:00/0000:00:1b.0 SysFS BusID: 0000:00:1b.0 Hardware Class: sound Model: "Intel Audio device" Vendor: pci 0x8086 "Intel Corporation" Device: pci 0x1c20 SubVendor: pci 0x1043 "ASUSTeK Computer Inc." SubDevice: pci 0x1053 Revision: 0x05 Driver: "snd_hda_intel" Driver Modules: "snd_hda_intel" Memory Range: 0xdf600000-0xdf603fff (rw,non-prefetchable) IRQ: 43 (71116 events) Module Alias: "pci:v00008086d00001C20sv00001043sd00001053bc04sc03i00" Driver Info #0: Driver Status: snd_hda_intel is active Driver Activation Cmd: "modprobe snd_hda_intel" Config Status: cfg=yes, avail=yes, need=no, active=unknown --------- # cat /etc/modprobe.d/50-sound.conf options snd slots=snd-hda-intel # u1Nb.8z5fa5aeCX3:Intel Corporation alias snd-card-0 snd-hda-intel --------- # aplay -L null Discard all samples (playback) or generate zero samples (capture) default:CARD=PCH HDA Intel PCH, VT1802 Analog Default Audio Device sysdefault:CARD=PCH HDA Intel PCH, VT1802 Analog Default Audio Device front:CARD=PCH,DEV=0 HDA Intel PCH, VT1802 Analog Front speakers surround40:CARD=PCH,DEV=0 HDA Intel PCH, VT1802 Analog 4.0 Surround output to Front and Rear speakers surround41:CARD=PCH,DEV=0 HDA Intel PCH, VT1802 Analog 4.1 Surround output to Front, Rear and Subwoofer speakers surround50:CARD=PCH,DEV=0 HDA Intel PCH, VT1802 Analog 5.0 Surround output to Front, Center and Rear speakers surround51:CARD=PCH,DEV=0 HDA Intel PCH, VT1802 Analog 5.1 Surround output to Front, Center, Rear and Subwoofer speakers surround71:CARD=PCH,DEV=0 HDA Intel PCH, VT1802 Analog 7.1 Surround output to Front, Center, Side, Rear and Woofer speakers iec958:CARD=PCH,DEV=0 HDA Intel PCH, VT1802 Digital IEC958 (S/PDIF) Digital Audio Output hdmi:CARD=PCH,DEV=0 HDA Intel PCH, HDMI 0 HDMI Audio Output
Could you give alsa-info.sh output (run with --no-upload option, and attach the output to this bug)?
Created attachment 470256 [details] Result of "alsa-info.sh --no-upload"
The lack of speaker output seems because of the invalid NID in the connection list of the pin widget 0x24. This confused the parser. I fixed it in the upstream code now. Please try alsa-driver-kmp on OBS multimedia:audio:KMP repo later. The changelog should contain the changelog entry: - DRIVER-HEAD:292bfbafb6231221450d19a3c48f1ca6434a384b - KERNEL-HEAD:4ff2f904c91f27021ea3ffe58309541e0cd5061a * ALSA: hda - Return the error from get_wcaps_type() for invalid NIDs About the output level. Make sure that you raise both "Heaphone" and "Master" volume. Now both influence on the output level of the headphone. Ditto for speaker. Raise both "Speaker" and "Master". The cause of the bad audio quality is hard to guess. From the driver side, there is no change. It might be the difference of sound backend, e.g. now using PulseAudio while it wasn't formerly. For testing, try aplay like % pasuspender -- aplay -Dsysdefault SOME-YOUR-FILE.wav If the sound works better with this, the problem is likely in PulseAudio (and/or the driver setup). Last but not least, don't forget to reset NEEDINFO flag after you providing the requested information. Thanks.
ОК, now speakers seem to work fine. Thank you! As for headphone out, it's my bad, with external amplifier it also sounds good. About microphone: previously I've tried to record only in mono (using audacity), and the recording was very distorted. But when I've tried recording in stereo it worked out just fine. I don't know if it is okay, but it's quite strange to me, because I'm absolutely sure my microphone is mono. Will there be a kernel update? Or it's till 12.2 release?
The mono-recording problem is likely because the laptop has a digital-mic of ForteMedia. It's a stereo d-mic and it's known to send a reverse-phased signal in one channel, thus summing stereo to mono results in almost nothing but background noises. Unfortunately there is no good workaround for this as long as you use PulseAudio and mono recording. Just try recording in stereo, or use ALSA-native directly (hw:0 or such) instead of "default" in the applications if possible. I can put the patch to 12.1 kernel as clearly it's a bug. The patch will be sent to both upstream and stable kernels, so the change won't be lost.
I committed the patch to 12.1 kernel git tree. The next (or later) update kernel will contain this fix. Until then, you can keep using alsa-driver-kmp. Let's close the bug now.
This is an autogenerated message for OBS integration: This bug (740118) was mentioned in https://build.opensuse.org/request/show/101098 12.1 / kernel-source