Sound.. then no sound after a while in 11.04

[PhonicLynx]

To the people experiencing this problem: do you have an HDMI output on your video card or motherboard? I'm not asking whether you're using it -- just whether you have one.

If you do, follow-up question: do you see these kinds of messages in dmesg:

hda-intel: IRQ timing workaround is activated for card #1. Suggest a bigger bdl_pos_adj.

In fact I have two on my ATI cards (as I have crossfire) I believe.. not sure why it thinks it's a HDMI interface because its only a d-port and two DVI's.. yet its picking it up in Linux and windows as HDMI out.

[spoon_]

In fact I have two on my ATI cards (as I have crossfire) I believe.. not sure why it thinks it's a HDMI interface because its only a d-port and two DVI's.. yet its picking it up in Linux and windows as HDMI out.

OK, the reason I ask is that I have a suspicion that the problem we're experiencing may be related to that.

I have two Nvidia cards with HDMI ports (neither of which I'm using) in my machine. I disabled HDMI by adding these lines to /etc/modprobe.d/blacklist.conf:

blacklist snd_hda_codec_nvhdmi
blacklist snd_hda_codec_hdmi

The first line is unnecessary if you have an ATI card. I don't know whether the second line is sufficient or another ATI-specific line is required.

Anyway, now my system no longer shows HDMI audio outputs and I no longer see those error messages in dmesg. But it's too soon to say whether this has fixed my sound issue. So far sound works. We'll see in time...

[spoon_]

Never mind, sound's gone! Good old Ubuntu.

[PhonicLynx]

Never mind, sound's gone! Good old Ubuntu.

Famous last words

[spoon_]

Famous last words

Indeed! Just curious, are you running Sandy Bridge by any chance? Is this an SB-specific issue?

[AKADAP]

To the people experiencing this problem: do you have an HDMI output on your video card or motherboard? I'm not asking whether you're using it -- just whether you have one.

Yes I have one and am not using it. I'm not sure I can use it since I need dual link DVI for my monitor.

If you do, follow-up question: do you see these kinds of messages in dmesg:

hda-intel: IRQ timing workaround is activated for card #1. Suggest a bigger bdl_pos_adj.

Yes I do have this message in dmesg.

[spoon_]

False alarm, AKADAP. Still a very mute Ubuntu.

[AKADAP]

False alarm, AKADAP. Still a very mute Ubuntu.

Are you sure?

Has anyone reported this problem without also having an HDMI audio output that they were not using?

[spoon_]

Are you sure?

Has anyone reported this problem without also having an HDMI audio output that they were not using?

I don't know. But I do know that even after disabling the HDMI outputs (such that the OS no longer sees them), the sound problem persists.

[spoon_]

Problem solved by switching to Fedora :/