APPLIED[G]: [SRU] [Unstable/OEM-5.6] [PATCH 0/1] Enable ASPM for links under VMD domain
Seth Forshee
seth.forshee at canonical.com
Tue Aug 25 20:15:58 UTC 2020
On Fri, Aug 21, 2020 at 10:34:39PM +0800, Kai-Heng Feng wrote:
> BugLink: https://bugs.launchpad.net/bugs/1889384
>
> [Impact]
> New Intel laptops with VMD cannot reach deeper power saving state,
> renders very short battery time.
>
> [Fix]
> Introduce a new quirk to program ASPM settings on bridges under VMD.
>
> [Test Case]
> A simple command to grep current LnkCtl state:
>
> $ sudo lspci -vv | grep -E '^(1|\s+LnkCtl:)'
>
> Confirm ASPM is enabled.
>
> [Regression Potential]
> None. The quirk matches device IDs that are specific to Intel Tigerlake
> systems, which are not on the market yet.
Applied to groovy/master-next, thanks!
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