New answers tagged brightness
For windows 8, go to PC Settings > PC and Devices > Power and Sleep > Turn off "Adjust my screen brightness automatically" and you should have your full brightness on
the below solutions works fine for me.. i am posting it as answer so that others might get help: change the permission: sudo chmod a+rw /sys/class/backlight/intel_backlight/brightness now change brightness: echo 400 > /sys/class/backlight/intel_backlight/brightness in your case it would be: /sys/class/backlight/acpi_video0/brightness
I have a Dell U2515H connected via HDMI to an nVidia card. I tried softMCCS and it worked fine. I was able to adjust the backlight brightness from the software. These are the control codes this monitors apparently supports: New control value Restore factory defaults Restore luminance/contrast defaults Restore color defaults Luminance Contrast Select color ...
Under Intel(R) HD Graphics Control Panel, go to Power, under Display Power Saving Technology, choose Disable, Apply Here is what Display Power Saving Technology does: Intel GPU model may include the Display Power Saving Technology feature that can save the computer's power consumption by optimizing picture contrast on the internal LCD.
I know this is an old question, but I figured I'd put my two cents in. I actually use f.lux, and it's a great piece of software. It supports (though I don't know since when) screen contrast dimming with use of the Alt+PgDn and Alt+PgUp hotkeys (Down for dimmer, up for brighter) and it's an eyesaver.
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