Public bug reported:
Some ThinkPad systems have a power-saving feature that turns off HDMI audio
device in Windows, but NVidia Linux driver does not support this feature. As a
result, HDMI audio will not work on Linux.
A BIOS workaround is added with an OEM_OSI string "Linux-Lenovo-NV-HDMI-Audio"
which needs enabling in Linux kernel too.
** Affects: hwe-next
Importance: Undecided
Status: New
** Affects: linux (Ubuntu)
Importance: High
Assignee: Alex Hung (alexhung)
Status: In Progress
** Tags: originate-from-1756020 sutton
** Changed in: linux (Ubuntu)
Assignee: (unassigned) => Alex Hung (alexhung)
** Changed in: linux (Ubuntu)
Status: New => In Progress
** Changed in: linux (Ubuntu)
Importance: Undecided => High
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https://bugs.launchpad.net/bugs/1787058
Title:
ThinkPad systems have no HDMI sound when using the nvidia GPU
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