Re: [RFC 0/2] ACPI: video: prefer native over vendor

[Hans de Goede <hdegoede@redhat.com>]

Hi,

On 11/5/22 15:52, Hans de Goede wrote:
> Hi Rafael, Matthew,
> 
> Here is a second attempt at always registering only a single
> /sys/class/backlight device per panel.
> 
> This first round of testing has shown that native works well even on
> systems so old that the don't have acpi_video backlight control support.
> 
> This patch series makes native be preferred over vendor, which should
> avoid the problems seen with the 6.1 changes before the fixes.
> 
> ATM there is one known model where this will cause a regression,
> the Sony Vaio PCG-FRV3 from 2003. I plan to add a DMI quirk for that
> in the next version of this series, but I'm waiting for some more
> testing (to check that the vendor interface does actually work) first.
> 
> I will also do another blogpost, focussing on asking users to see
> if they have a laptop which provides a combination of vendor + native
> backlight interfaces, which may be impacted by this series. This is
> the main reason why this is a RFC for now.

The blogpost requesting testing of laptops with a combination
of vendor + native backlight interfaces can be found here:

https://hansdegoede.dreamwidth.org/27024.html

Regards,

Hans