Auto-brightness difficulty

Discussion in 'iPhone Tips, Help and Troubleshooting' started by Praetorian®, Feb 8, 2009.

  1. Praetorian® macrumors regular

    Praetorian®

    Joined:
    Jan 28, 2008
    Location:
    Czech Republic
    #1
    I got my iPhone 3G for almost 2 months and I still haven't found out how auto-brightness works. Everything in settings seems to be set up properly - the auto-brightness is on and brightness is in the middle of the bar.

    Sometimes when I do something in the dark, iPhone brightness suddenly decreases which is nice because it doesn't hurt my eyes but few minutes after brightness goes back to maximum allowed level. It's really annoying.

    Also, I tried a small test. I was in a room with very bright light. iPhone display was very bright. Then I turned the lights off but iPhone kept shining like crazy. To decrease brightness, I had to press power button (so iPhone got locked) unlock it and then brightness was finally adjusted.

    How does auto-brightness work on your iPhone?
     
  2. DPA macrumors 65816

    DPA

    #2
    Not very good for me either.

    I have found the sensors take a while to send the information to the CPU and make the necessary adjustments. Since I have mine jailbroken, I use SBPrefs to adjust the brightness in a flash, no pun intended.

    David
     
  3. Praetorian® thread starter macrumors regular

    Praetorian®

    Joined:
    Jan 28, 2008
    Location:
    Czech Republic
    #3
    Now I tried the opposite test. To have iPhone in dark room and then turn the lights on. It adjusted in about two seconds. It's pretty weird it works one way and not the other...
     
  4. DPA macrumors 65816

    DPA

    #4
    Hopefully Apple will find some new and improved ambient light sensors for a new iPhone or fix this in a future firmware update.

    David
     

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