Automatic brightness adjustment is enabled automatically after I disable it and restart my phone
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HUAWEI Mate 10，HUAWEI nova 7 SE(single card 8gb+128gb、dual sim 8gb+128gb)，HUAWEI nova 7(dual card 8gb+256gb)，HUAWEI Y7a(huawei p smart 2021 dual card 4gb+128gb)，HUAWEI P40 lite 5G(huawei nova 7 se dual sim 8gb+128gb、huawei nova 7 se single card 8gb+128gb)，HUAWEI Y8p，HUAWEI Mate 30(dual sim card 8gb+256gb、dual sim card 8gb+128gb)，HUAWEI P smart 2021(dual card 4gb+128gb)，HUAWEI P20，HUAWEI Mate 40 Pro(single sim card 8gb+256gb、dual sim card 8gb+256gb)，HUAWEI Y9a(dual card 8gb+128gb)，HUAWEI Mate 20 X (5G)，HUAWEI P40 Pro+(dual sim card 8gb+512gb)，HUAWEI P40 Pro(single sim card 8gb+256gb、dual sim card 8gb+256gb)，HUAWEI Mate 10 Pro，HUAWEI Mate 20，HUAWEI P20 Pro，HONOR 10X Lite(dual card 4gb+128gb)，HONOR 9S，HUAWEI P30，HUAWEI Mate 30 Pro(dual sim card 8gb+256gb、dual sim card 8gb+128gb)，HUAWEI Mate 30 Pro 5G(dual sim card 8gb+256gb、dual sim card 8gb+128gb)，HUAWEI Mate 20 Pro，HUAWEI P smart S，HUAWEI Mate 20 X，HUAWEI P30 Pro，HONOR 9X Pro(dual sim card 6gb+256gb)，HUAWEI Mate Xs，HUAWEI P40(single sim card 8gb+128gb、dual sim card 8gb+128gb)，HUAWEI Y5p(dual card 2gb+32gb)
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| Automatic brightness adjustment is enabled automatically after I disable it and restart my phone |
Cause:
Generally, automatic brightness adjustment saves more power than manual adjustment. Therefore, your phone enables automatic screen brightness adjustment each time you power on your phone.
Solution:
You can disable automatic screen brightness adjustment by searching for and accessing Brightness in Settings.
Thanks for your feedback.