I upgraded my Sony SVF15A13SN -- which came with Windows 8 out of the box -- to Windows 8.1 yesterday, and have been unable to change my screen's brightness since; it's stuck on maximum.
I could change it just fine until yesterday. The brightness setting in the Settings Charm is unavailable (greyed out) now, and says "Windows can't adjust the brightness on this display" when I hover my cursor over it. The Fn+F5/F6 is also doing nothing. And I mean nothing -- I keep reading about people whose Brightness sliders move up and down while having no effect on the brightness; in my case, those buttons do nothing at all.
For all the lazy people out there who don't want to look up what hardware I'm sporting, it's an Intel® HD Graphics 4000 and an NVIDIA® GeForce® GT735M.
Now, these are the "solutions" I've found online:
- "Update Intel driver"
Tried it. Didn't help.
- "Roll back to previous Intel driver"
Tried it. Didn't help.
- "Switch to basic display adapter"
Tried it. Didn't help.
- "Disable Intel adapter, restart, Enable Intel adapter, restart"
Tried it. Didn't help.
- "Update NVIDIA driver"
It's up to date.
- "Disable adaptive brightness"
Tried it. Didn't help.
So.
What next?