APPLIED[D/Unstable]: [PATCH][SRU][Bionic] HP workstations cannot output to external monitors by dGPU

[Seth Forshee]

On Mon, Jan 07, 2019 at 08:13:20AM -0800, Alex Hung wrote:
> BugLink: http://bugs.launchpad.net/bugs/1810702
> 
> [Impact]
> 
>   HP mobile workstations are able to output to external monitors by dGPU in
>   Windows with hybrid graphics, but this is not supported by Linux GPU
>   drivers. As a result, this feature needs to be supported by BIOS but
>   an _OSI string is required.
> 
> [Fix]
>   BIOS added solutions with _OSI string "Linux-HPI-Hybrid-Graphics" to
>   workaround, and a patch to report _OSI("Linux-HPI-Hybrid-Graphics")
>   is required in Linux kernel.
> 
>   The patches are included in upstream and are cherry-picked from Linus's repo.
> 
> [Regression potential]
>   No regression as all but targeted firmware will not use this _OSI string

Please be sure to send SRU patches for the development kernel too if
they aren't there already. Applied to disco/master-next and
unstable/master, thanks!

I'll also reiterate Colin's question. Shouldn't this go into cosmic too?