Just upgraded two different Asus laptops to Big Sur and ran into the same issue on each, where the internal laptop display (LVDS) will remain blank / not power on when resuming from sleep, and then realized that backlight/brightness slider is no longer working (tried both PNLF-SSDT.aml method with kexts, or enabling backlight via Clover, as well as patching DSDT, and none of these method work any longer (and did previously).
All latest kexts installed, and not sure exactly what may be causing this (issue was not present prior to update), so I'm assuming something to do with 11.04 and possibly Whatevergreen or Clover itself.
One machine has the Intel HD620 and the other is an Nvidia Optimus (disabled) with Intel 4600.
Anyone have any other suggestions or run into the same problem? Thanks!
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