please help me fix Brightness Control Nvidia Graphics Only Laptop in Laptops Posted August 5, 2019 1 hour ago, tonyx86 said: @rongu I don't work on the ThinkPad T61 very often (only updated to Mojave to see if it worked and it works well for a 2008 laptop). If I remember to get the DSDT the next time I'm on that system, I'll post here. In all honesty, the DSDT does not add any value to this thread. Everything that I required to implement onejay09's brightness fix for the Thinkpad T61 is in my previous post. I hope that helps. I think the biggest revelation for me was that the GFX0._DSM doesn't require much if you use CLOVER's "Inject NVidia" option. It significantly simplifies this brightness fix on the Thinkpad T61 and maybe other laptops as well (likely with different values for pwm-info and NVCAP). . Appreciate your reply, Thank You.