Ubuntu 20.04.2 + Lenovo Legion 5 brightness (intel+nvidia)

djex

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Hello friends. About 1 week i can`t fix my problem with last LTS Ubuntu. I have Lenovo Legion 5 (i7+1660ti). All works fine, but brightness control doesn`t work at all. I`ve tried all fixes from forums and can`t solve this problem. Last kernel didn`t fix this problem. Also i tried last Ubuntu 21, Kubuntu, Pop OS - everywhere is the same problem.
What i need - turn on intel graphics and turn off nvidia (so in bios need to be hybrid mode). I saw many fixes for AMD graphics, but not for intel. Any ideas? Big thank you

By the way
1)If i enable in bios Hybrid mode - i have the same brightness as in Windows by default in Ubuntu, without can`t changing
2)If i enable in bios Discrete mode - i have 100% brightness in Ubuntu, without can`t changing
 
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