It appears as if there are at least two separate causes here - at least
for 11.04. There's a suspend (pm-utils) bug that we just fixed in 11.10
and seems worth backporting to 11.04. You all can help verify whether
it's related by reproducing the symptom in this bug report from clean
boots, i.e., without suspend+resume cycles involved.

Finally, there is a PA card init "bug," it seems, though I'm hesitant to
blacklist the "ThinkPadEC audio driver". We very well may?should?
support its features at the input layer, but since that hasn't arrived
at the ALSA layer yet, we can't do much. Further, it doesn't make much
sense to support it as a sink or source...

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https://bugs.launchpad.net/bugs/773443

Title:
  [natty] pulseaudio stopped working on ThinkPad T61

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