#697: Sound distortion with pulseaudio, HDA intel and Realtek --------------------+------------------------------------------------------- Reporter: cvine | Owner: lennart Type: defect | Status: new Milestone: | Component: daemon Keywords: | --------------------+------------------------------------------------------- I have recently obtained a Levono S12 netbook which uses an HDA Intel sound card with Realtek ALC269 chip. I am using pulseaudio-0.9.19, with alsa-lib-1.0.21a and and the pulseaudio plugin from alsa-plugins-1.0.21, and the alsa driver with the 2.6.31.5 linux kernel.
Sound playing starts off OK, but at random intervals it becomes high pitched and "scratchy" (tonality is lost). This can happen when starting any new sound output although it is often triggered by a sound event occuring via libcanberra at the same time as pulseaudio is playing something else. Normal sound can usually be restored by stopping any program such as totem which is playing (the now-distorted) sound, and changing volume levels with alsamixer or the pulseaudio volume control. If that doesn't work (it doesn't always) normal sound will be restored if no sound is outputted for a period (say 10 seconds). Normal sound can also be restored by stopping and restarting pulseaudio. dmesg does not report anything when this happens. I run pulseaudio as a user daemon (not a system daemon). This occurs whether sound is being played by pulseaudio directly (eg libcanberra or totem) or via the alsa plugin. I have tried pulseaudio-0.9.17, but I get the same effect with that. Sound works normally if I do not start pulseaudio and use alsa and gstreamer directly. lspci -v gives the following audio hardware information: 00:1b.0 Audio device: Intel Corporation 82801G (ICH7 Family) High Definition Audio Controller (rev 02) Subsystem: Lenovo Unknown device 3be9 Flags: bus master, fast devsel, latency 0, IRQ 22 Memory at fc140000 (64-bit, non-prefetchable) [size=16K] Capabilities: [50] Power Management version 2 Capabilities: [60] Message Signalled Interrupts: Mask- 64bit+ Queue=0/0 Enable- Capabilities: [70] Express Root Complex Integrated Endpoint, MSI 00 Capabilities: [100] Virtual Channel <?> Capabilities: [130] Root Complex Link <?> Kernel driver in use: HDA Intel Kernel modules: snd-hda-intel lsmod | egrep "snd|sound" gives: snd_seq_dummy 2592 0 snd_seq_oss 27648 0 snd_seq_midi_event 6076 1 snd_seq_oss snd_seq 46576 5 snd_seq_dummy,snd_seq_oss,snd_seq_midi_event snd_seq_device 6280 3 snd_seq_dummy,snd_seq_oss,snd_seq snd_pcm_oss 37024 0 snd_mixer_oss 15644 1 snd_pcm_oss snd_hda_codec_realtek 199520 1 snd_hda_intel 24680 4 snd_hda_codec 64092 2 snd_hda_codec_realtek,snd_hda_intel snd_hwdep 6752 1 snd_hda_codec snd_pcm 67776 3 snd_pcm_oss,snd_hda_intel,snd_hda_codec snd_timer 19236 2 snd_seq,snd_pcm snd 51556 19 snd_seq_oss,snd_seq,snd_seq_device,snd_pcm_oss,snd_mixer_oss,snd_hda_codec_realtek,snd_hda_intel,snd_hda_codec,snd_hwdep,snd_pcm,snd_timer soundcore 6112 1 snd snd_page_alloc 8164 2 snd_hda_intel,snd_pcm Is there any further information I can provide? -- Ticket URL: <http://pulseaudio.org/ticket/697> PulseAudio <http://pulseaudio.org/> The PulseAudio Sound Server _______________________________________________ pulseaudio-tickets mailing list pulseaudio-tickets@mail.0pointer.de https://tango.0pointer.de/mailman/listinfo/pulseaudio-tickets