https://www.virtualbox.org/changeset/55272/vbox/trunk/src/VBox/Devices/Audio/DevIchAc97.cpp
since it hardcode ad1980 on a dell machine, you may need patch in alsa
driver to prevent the swap of the master playback volume/switch and
headphone playback volume/switch
if (fChipAD1980)
{
PCIDevSetSubSystemVendorId(&pThis->PciDev, 0x1028); /* 2c ro - Dell.)
*/
PCIDevSetSubSystemId (&pThis->PciDev, 0x0177); /* 2e ro. */
}
else
{
PCIDevSetSubSystemVendorId(&pThis->PciDev, 0x8086); /* 2c ro -
Intel.) */
PCIDevSetSubSystemId (&pThis->PciDev, 0x0000); /* 2e ro. */
}
** Changed in: alsa-driver (Ubuntu)
Status: Invalid => Incomplete
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https://bugs.launchpad.net/bugs/1487168
Title:
[Emulated AD1980 AC97 inside Virualbox 5.0, playback] volume slider
problem
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