On Sat, Nov 5, 2022 at 4:17 PM Hans de Goede <hdegoede@xxxxxxxxxx> wrote: > > 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 The patches in this series look reasonable to me, even though I'm not sure if the assumption that the Windows 8 hardware certification requirements were always followed is not overly optimistic.
