I've had the same problem on Lucid. I've found a solution in Bug report
#445889. I will quote Arwin Tugade:
"
There is this tool that lets you flip settings around but the changes aren't
persistant: http://www.alsa-project.org/main/index.php/HDA_Analyzer
To get my speakers working, I ran the hda_analyzer above and under
"Node[0x19]" at the bottom in a pane called "Widget Control", I flipped
the VREF to "HIZ" and that did the trick. Because I'm impatient, I
flipped this value in the kernel source tree I'm using (stable
2.6.33.2):
<KERNPATH>/sound/pci/hda/patch_realtek.c
13479c13479
< {0x19, AC_VERB_SET_PIN_WIDGET_CONTROL, PIN_VREF80},
---
> {0x19, AC_VERB_SET_PIN_WIDGET_CONTROL, PIN_IN},
Recompiled and it's persistent. This is just informational and is by no
means a official solution, so use it at your own risk, I just wanted to
get this out of the way so I can get on to using my laptop. "
I haven't changed the value in the kernel source yet. But the non-
persistent solution works for me so the persistent solution should work
to. But it's quite harder...
--
no sound with Realtek ALC269 - on Sony Vaio VPCEB1S1E
https://bugs.launchpad.net/bugs/546769
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