Keyboard backlight on boot up, File Vault and T2

Discussion in 'MacBook Pro' started by cobracnvt, Dec 3, 2018.

  1. cobracnvt macrumors 6502

    cobracnvt

    Joined:
    Apr 6, 2017
    #1
    I just got a 2018 MacBook Pro with the new T2 chip. I'm passing information this along as a general FYI...

    When booting up my new MBP, the keyboard backlight and the Touch bar wouldn't turn on for the login screen. No Touch Bar, so I can't adjust the keyboard backlight. I find this annoying as I'm still getting used to the new keyboard and now have to turn up the room lights so I could see the keyboard while entering my password.

    Apple Support confirmed this behavior is because of having FileVault enabled and how the T2 chip behaves.

    Apple's expected behavior is that when FileVault is enabled, the laptop's boot up behavior is changed. When the MBP is initially turned on, the Touch Bar and the keyboard backlight will stay off until your password is entered.

    Once my account password is entered, it then will continue booting, the keyboard backlight and Touch Bar will then turn on.

    I tested this by turning File Vault off, and the keyboard backlight turns on for the login screen during the initial boot up. I still can't use the fingerprint sensor for the initial login though. Like the iPhone, you have to enter your password for the initial login.
     
  2. chrfr macrumors 604

    Joined:
    Jul 11, 2009
    #2
    This isn't new to the T2 based computers. My 2013 MBP doesn't light up the keyboard at the Filevault screen either.
     
  3. cobracnvt thread starter macrumors 6502

    cobracnvt

    Joined:
    Apr 6, 2017
    #3
    Good to know. The Apple support tech I spoke to blamed the T2 chip for this behavior.
     
  4. chrfr macrumors 604

    Joined:
    Jul 11, 2009
    #4
    It's because macOS isn't running at the Filevault screen, so there are no drivers to enable the backlight. It's got nothing to do with the T2.
     
  5. filmbuff macrumors 6502a

    filmbuff

    Joined:
    Jan 5, 2011
    #5
    You've never been able to see that backlight before login. A slight annoyance. But who shuts down their Macbook anyway? Just sleep it.
     
  6. cobracnvt thread starter macrumors 6502

    cobracnvt

    Joined:
    Apr 6, 2017
    #6
    I think this is why I never noticed it before with my old MacBook Pro...
     

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5 December 3, 2018