Automatic brightness adjustment is enabled automatically after I disable it and restart my phone
Applicable products：
HUAWEI Mate 10，HUAWEI Mate40 lite E，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 Mate 20 X (5G)，HUAWEI Y8p(dual card 4gb+128gb)，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 P smart S(huawei y8p dual card 4gb+128gb)，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 Y9s(huawei p smart pro dual sim card 6gb+128gb)，HUAWEI P smart Pro，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)
Applicable system:
Magic UI 3.1.1, EMUI 9.1.1, EMUI 9.0.1, Magic UI 3.1, EMUI 10.1.1, EMUI 10.0.1, EMUI 11.0, EMUI 10.1, EMUI 10.0, EMUI 8.0, EMUI 8.1, EMUI 9.0, EMUI 9.1, EMUI 8.2
Applicable products：
Applicable system:
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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.