Ubuntu 20.04 LTS version screen brightness adjustment is invalid-CodePudding

description: with the dual system of Windows 10 + ubuntu20.04, windowes10 can adjust the screen brightness, although under ubuntu system Settings to adjust brightness slider, but after the slider sliding adjust brightness does not work, brightness as the maximum brightness, still very dazzling,

Several description :
1. The system Settings of brightness adjustment slider

2. The computer configuration is as follows:

3. I have tried many ways, can say online can find methods are used the , the result is sad, and did not like me ununtu20.04 LST users encounter this problem, so on this question, online urgent solutions, such as
CodePudding user response:
Why don't change the desktop environment? Words I 20.04 LTS with Cinnamon, Settings, inside the
CodePudding user response:
Is not convenient in oh, otherwise will not ask,,,
CodePudding user response:
Estimate the machine does not support this system
CodePudding user response:
reference wisewoman reply: 3/f
estimates that the machine does not support this system

Other function is normal, just a brightness control this not line,,,
CodePudding user response:
I am also in setting can adjust brightness, but the screen does not change, could you tell me the landlord to solve the problem?
CodePudding user response:
refer to 7th floor weixin_46508700 response:
I am also in setting can adjust brightness, but the screen does not change, could you tell me the landlord to solve the problem?

no problem, well, look for a moment to rest, too bright,
CodePudding user response:
Before into the system, using a keyboard shortcut press?
CodePudding user response:
references 9 f wisewoman response:
before into the system, use keyboard shortcuts to press the no?

no
CodePudding user response:
Press the wrong key. Stay in the BIOS Settings interface, can adjust the brightness?
CodePudding user response:
I also am this problem, the online methods were tried, basic no effect, I suspect that the graphics card driver has a problem, but didn't find a good solution
CodePudding user response:
The
reference 11 floor wisewoman response:
press the wrong key. Stay in the BIOS Settings interface, can adjust the brightness?

can say the specific feasible method? I don't quite understand what you mean,
CodePudding user response:
refer to 12th floor flying cow 1 reply:
I also am this problem, the online methods were tried, basic no effect, I suspect that the graphics card driver has a problem, but did not find a good solution

I still haven't solve,
CodePudding user response:
Update the LInux kernel can be solved, I the kernel version 5.7.4 can be adjusted, or refer to the http://www.manongjc.com/detail/17-pzbwmescjclnqad.html
CodePudding user response:
Also install the dual system of Windows 10 + ubuntu20.04, windowes10 adjustable, highest brightness adjustment is invalid under ubuntu.
Also is 4800 u, R7 heeded.
CodePudding user response:
Cinnamon can adjust