confirmed issue on lucid 2.6.32-22-generic x86-64
Dell optiplex 980

st...@work:~$ sudo alsactl init 0
Unknown hardware: "HDA-Intel" "Realtek ALC259" "HDA:10ec0269,102802da,00100100" 
"0x1028" "0x02da"
Hardware is initialized using a guess method

tweaking 0x21 (as suggested in the patch linked by the original
reporter) with HDAAnalyzer  does indeed allow sound to be heard.

Note: alsamixer reports the affected channel as line out.
Note2: sound will work if line out is MUTED.  state is inverted.

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Sound does not work with Intel HDA Realtek Codec ALC259
https://bugs.launchpad.net/bugs/575793
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