My system has been suffering from random freezes lately. I think it might have something to do with my graphics card which I've hopefully fixed it.
However, after one of those freezes I was forced to reboot my system and since then my sound no longer works and more specifically all I hear out of my speakers are random pops every 5-10 seconds.
This was a clean install of Ubuntu 11.04 and sound was working previously just fine. The speakers still work as I've tested them on another machine.
I was not attempting to fix the graphics card problem at the time the sound stopped working, I fixed that problem later after the sound was already popping.
I've tried removing ~/.pulse & ./pulse-cookie
I've tried reinstalling pulseaudio with:
sudo apt-get --purge remove linux-sound-base alsa-base alsa-utils sudo apt-get install linux-sound-base alsa-base alsa-utils
options snd-hda-intel model=auto to my /etc/modprobe.d` file.
My sound is not muted.
The speakers pop even if my volume is muted.
alsamixer shows that all my volume levels are set to 100%
I do not have my HDMI selected instead of my regular stereo analog output (in fact, I've disabled my HDMI output entirely in System -> Preferences -> Sound)
I've made sure that my user account is added to the audio, pulse and pulse access groups.
Here are a couple of outputs that might be useful:
$ dmesg | grep -i hda
[ 5.455970] HDA Intel 0000:00:14.2: PCI INT A -> GSI 16 (level, low) -> IRQ 16 [ 5.545302] HDA Intel 0000:01:00.1: PCI INT B -> GSI 19 (level, low) -> IRQ 19 [ 5.545305] hda_intel: Disable MSI for Nvidia chipset [ 5.545349] HDA Intel 0000:01:00.1: setting latency timer to 64 [ 471.612677] hda-intel: IRQ timing workaround is activated for card #0. Suggest a bigger bdl_pos_adj. [ 1078.442662] hda-intel: IRQ timing workaround is activated for card #2. Suggest a bigger bdl_pos_adj.
$ cat /proc/asound/cards
0 [SB ]: HDA-Intel - HDA ATI SB HDA ATI SB at 0xfbff8000 irq 16 1 [U0x46d0x825 ]: USB-Audio - USB Device 0x46d:0x825 USB Device 0x46d:0x825 at usb-0000:00:13.2-3, high speed 2 [NVidia ]: HDA-Intel - HDA NVidia HDA NVidia at 0xfe77c000 irq 19
$ aplay -l | grep card
card 0: SB [HDA ATI SB], device 0: ALC892 Analog [ALC892 Analog] card 0: SB [HDA ATI SB], device 1: ALC892 Digital [ALC892 Digital] card 2: NVidia [HDA NVidia], device 3: HDMI 0 [HDMI 0] card 2: NVidia [HDA NVidia], device 7: HDMI 0 [HDMI 0] card 2: NVidia [HDA NVidia], device 8: HDMI 0 [HDMI 0] card 2: NVidia [HDA NVidia], device 9: HDMI 0 [HDMI 0]
$ sudo lsmod | grep snd
snd_hda_codec_hdmi 28103 4 snd_hda_codec_realtek 336693 1 snd_hda_intel 33211 2 snd_hda_codec 103804 3 snd_hda_codec_hdmi,snd_hda_codec_realtek,snd_hda_intel snd_usb_audio 112426 1 snd_usbmidi_lib 25139 1 snd_usb_audio snd_hwdep 13604 2 snd_usb_audio,snd_hda_codec snd_pcm 96625 4 snd_hda_codec_hdmi,snd_hda_intel,snd_hda_codec,snd_usb_audio snd_seq_midi 13324 0 snd_rawmidi 30486 2 snd_usbmidi_lib,snd_seq_midi snd_seq_midi_event 14899 1 snd_seq_midi snd_seq 61621 2 snd_seq_midi,snd_seq_midi_event snd_timer 29602 2 snd_pcm,snd_seq snd_seq_device 14462 3 snd_seq_midi,snd_rawmidi,snd_seq snd 67382 18 snd_hda_codec_hdmi,snd_hda_codec_realtek,snd_hda_intel,snd_usb_audio,snd_hda_codec,snd_hw dep,snd_usbmidi_lib,snd_pcm,snd_rawmidi,snd_seq,snd_timer,snd_seq_device soundcore 12680 1 snd snd_page_alloc 18529 2 snd_hda_intel,snd_pcm
This is a desktop machine, not a laptop.
Any help would be much appreciated. Thanks in advance. Please let me know if there is any other information that might be helpful.