APPLIED: [PATCH 0/1][SRU][Bionic] Enable BIOS workaround for Nvidia HDMI audio

Khaled Elmously khalid.elmously at canonical.com
Thu Aug 23 05:23:31 UTC 2018


..to bionic/master-next

On 2018-08-14 20:18:43 , Alex Hung wrote:
> BugLink: https://bugs.launchpad.net/bugs/1787058
> 
> [Impact]
> 
>   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.
> 
> [Fix]
> 
>   BIOS added solutions with _OSI string "Linux-Lenovo-NV-HDMI-Audio" to
>   workaround, and a patch to report _OSI("Linux-Lenovo-NV-HDMI-Audio")
>   is required in Linux kernel.
> 
>   The patche is included in upstream and is cherry-picked from Linus's repo.
> 
> [Regression potential]
> 
>   No regression as all but targeted firmware will not use this _OSI string
> 
> Alex Hung (1):
>   ACPI / OSI: Add OEM _OSI string to enable NVidia HDMI audio
> 
>  drivers/acpi/osi.c | 8 ++++++++
>  1 file changed, 8 insertions(+)
> 
> -- 
> 2.17.1
> 
> 
> -- 
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