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Latitude 7280: Problem with backlight control


Dell7280pl

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Adding a separate SSDT-PNLF is not going to work because ACPI operation will probably prevent injecting a 2nd PNLF device having already a patched one.

 

As for deleting your existing SSDT, I could not possibly recommend it because you have one of those all-inclusive SSDTs that includes several other patches that are usually provided individually through separate SSDTs; so if you remove your current patched table to replace it by a PNLF SSDT only, you'll probably break your Hack.

 

What you may consider though in such situation is either:

  • replace the PNLF contents of your current all-inclusive SSDT by that of a dedicated SSDT-PNLF

or

  • switch back to a more traditional set of individual SSDT patched tables which allows you to know exactly what you've got in terms of patches

Whatever you choose to do, do it through a bootable USB key. Some people are fans of this sort of all-inclusive SSDTs but I'm of the opinion that they cause more trouble than good because, like distros, you never know what's inside until you carefully look at the code they contain.

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