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Brightness adjustment doesn't work since I updated my MBP 2017

Hey There,

After I updated my MacOs to Big Sure It stopped functioning it shows me in the touch bar that it going up and down but nothing happening on the screen itself.

I tried reinstalling Catalina and it worked. but once I update it to the latest version which is Big Sur 10.6 it stops working.

Please I searched everywhere for the solution but none helped me.


MacBook Pro 13″, macOS 10.15

Posted on Sep 24, 2021 10:28 AM

Reply
Question marked as Top-ranking reply

Posted on Sep 25, 2021 7:24 AM

ZuZanoa wrote:

Hey There,
After I updated my MacOs to Big Sure It stopped functioning it shows me in the touch bar that it going up and down but nothing happening on the screen itself.
I tried reinstalling Catalina and it worked. but once I update it to the latest version which is Big Sur 10.6 it stops working.
Please I searched everywhere for the solution but none helped me.



On an Intel Mac you can try —


resetting the SMC https://support.apple.com/en-us/HT201295


resetting NVRAM/PRAM http://support.apple.com/kb/ht1379

(get at least two-three rounds of the chimes when holding the NRAM Reset)



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2 replies
Question marked as Top-ranking reply

Sep 25, 2021 7:24 AM in response to ZuZanoa

ZuZanoa wrote:

Hey There,
After I updated my MacOs to Big Sure It stopped functioning it shows me in the touch bar that it going up and down but nothing happening on the screen itself.
I tried reinstalling Catalina and it worked. but once I update it to the latest version which is Big Sur 10.6 it stops working.
Please I searched everywhere for the solution but none helped me.



On an Intel Mac you can try —


resetting the SMC https://support.apple.com/en-us/HT201295


resetting NVRAM/PRAM http://support.apple.com/kb/ht1379

(get at least two-three rounds of the chimes when holding the NRAM Reset)



Brightness adjustment doesn't work since I updated my MBP 2017

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