Unable to adjust screen brightness, Big Sur

App & System Services Core OS
Quincy7HV OP
Created Nov ’20
Replies 35
Boosts 0
Views 19k
Participants 30
Hi. I updated to Big Sur last night (Nov 15th), and I am unable to adjust the screen brightness using either the function keys, command center, or system preferences. In all cases, the tiles move appropriately, but there is no actual change in brightness. Seems to be stuck on full bright. I’m using a 2014 MBP.

Is there anything I can do to fix this issue?

Thank you!
Replies  35
Boosts  0
Views  19k
Participants  30
Quincy7HV OP
Nov ’20
Accepted Answer
Never mind! Today it’s working great! Now if I can just figure out to delete this thread...
0
melissamc26 OP
Nov ’20
I updated from macOS Big Sur 11.0.0 to 11.0.1 last night, and having the same issue, except my screen is stuck on the lowest brightness. How did you resolve the issue Quincy7HV?
1
melissamc26 OP
Nov ’20
Restarting the computer solved the issue.
0
mmoayyed OP
Nov ’20
I am seeing a similar issue, running 11.0.1. After the Big Sur update, the screen begins to automatically adjust brightness settings *even when* the "automatically adjust brightness" setting is turned off. Brightness is always low. Restart does not seem to help. Is this a bug? No matter what the brightness setting, the system always auto-adjusts. (I do have Night Shift turned on; not sure that matters)
1
StephC0503 OP
Nov ’20
I’ve had the same issue. And I’m not sure how to fix it. Updated last night.
1
_po_ OP
Feb ’21
Have the same issue. Screen seems to change brightness slightly automatically.
Also after restart seems manual screen brightness tuning to be working for some time but then it doesn't work.

PS: last releases of apple software (at least mac os and ios) are really disappointing. Would be better they release less features but have better quality.
Otherwise, it might one day become as buggy as windows or android :)
1
LeonardSch OP
Mar ’21
Having the same issue using a macbook air 2017 (old model). Screen goes dark for some minutes when laptop is restarted.
1
Carlos1957 OP
Apr ’21
Same problem here; upgraded this morning from El Capitan; Macbook of 2016; restarting did not work; I'm in the dark, literally and metaphorically...
1
sehej OP
Apr ’21
Same here, it came up when I updated to 11.3.
2
rodion1322 OP
Apr ’21
same problem, on MBR 2014 15" after update to 11.3
2
Ricky_angg OP
May ’21
same problem here, how to fix this ? i just updated to big sur with my MBP 2014, a can't even change the brightness, anyone know how to solve this?
1
Suki10 OP
May ’21
Updated to 11.3 today and I also have this error. Any suggestions?
1
Suki10 OP
May ’21
Updated to 11.3.1 today and the issue is still there.
1
Suki10 OP
May ’21
Spent 40 minutes on a screen share call earlier with Apple. They couldn't solve the issue.
1
Loris Balsamo OP
May ’21
I have the same problem with my MacBook Pro 13" 2017
0
Unable to adjust screen brightness, Big Sur
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