younglo / cyanogenmod4milestone

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Screen refuses to go to full brightness #786

Open GoogleCodeExporter opened 8 years ago

GoogleCodeExporter commented 8 years ago
What is the Mod-Version you are using?
CM7.2.4d

What steps will reproduce the problem?
1.Power on the phone
2.Watch the M logo and 2ndboot splashscreen in full brightness
3.When booting completes, watch screen dim to about 20% of full brightness, 
even when brightness is maximized in Setting->Display and cat 
/sys/class/leds/lcd-backlight/brightness returns 255
4.Open apps like Browser and MMS, see screen flickers

What is the expected output? What do you see instead?

The ideal outcome should be screen lighting at full brightness. Currently 
adjusting brightness in Setting->Display only changes the screen from dim to 
barely readable. 

What did you do trying to solve the problem?

Disabled custom light level in CM Setting, rebootting, full wiping, reverting 
back to pre-2ndboot builds, all no avail. Couldn't revert to stock due to issue 
with bootloader.

Please provide any additional information below. (/cache/logger, /dev/log)

This problem occurred after I updated to 2ndboot builds, but I can't say with 
certainty that this is the exact cause. Screen is capable of displaying at full 
brightness during boot process, so shouldn't be a hardware issue. 

Original issue reported on code.google.com by billyzs....@gmail.com on 1 Mar 2013 at 4:48