The just-released ALSA 1.0.23 may help. From the changelog:
- ALSA: hda - Remove the COEF setup for ALC267/ALC268
The COEF setup for model=auto seems problematic on some laptops,
resulting in the silent speaker output. Better to disable it for now.
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[Jaunty] No sound on a Toshiba Tecra A10
https://bugs.launchpad.net/bugs/361878
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