If the radeon driver is the problem and the intel one works, then just
disabling the radeon hdmi card would be a better workaround, i e, in
your case:
options snd-hda-intel enable=1,1,0
Vga-switcheroo cards are quite unusual so I don't have much experience
with those. Does the above work for you (as long as you keep the radeon
GPU disabled)?
** Package changed: pulseaudio (Ubuntu) => alsa-driver (Ubuntu)
** Changed in: alsa-driver (Ubuntu)
Status: Confirmed => Triaged
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https://bugs.launchpad.net/bugs/1310260
Title:
Pulseaudio fails to detect card (probably due to hybrid graphics)
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