I have an Acer Aspire 8930G with Windows 8.1 x64 and Windows 7 x86 as a dual-boot. I use 8.1 as my everyday OS and only boot into 7 to play older games that only work with a 32-bit OS.
Ever since I installed Windows 8, I have not been able to adjust the brightness of my screen. Note that this problem started since I installed 8, not 8.1, and before I put on the copy of 7 as a dual-boot. When I use Fn+left/right (the brightness keys on my PC), the brightness slider appears on-screen and goes up and down, but the brightness of the panel doesn't actually change. Using the Charm doesn't help either, nor does adjusting it through the Control Panel.
I have tried fiddling with my Power Options in the Control Panel and disabling adaptive brightness. I have tried several different driver versions for my GPU, a GeForce 9600M GT. None of this has helped.
In Windows 7, however, the brightness controls work fine. If I want to adjust my brightness for 8.1, I have to boot into 7, change the brightness there, and then boot back into 8.1, where it will keep whatever brightness setting I was using in 7.
Does anyone have any ideas on how to fix this? Is there some messed-up thing in the Registry? Is my GPU's firmware maybe just not compatible with Windows 8? I took a look at TechPowerUp's repository of GPU BIOSes, but it appears I already have the most recent one.
Ever since I installed Windows 8, I have not been able to adjust the brightness of my screen. Note that this problem started since I installed 8, not 8.1, and before I put on the copy of 7 as a dual-boot. When I use Fn+left/right (the brightness keys on my PC), the brightness slider appears on-screen and goes up and down, but the brightness of the panel doesn't actually change. Using the Charm doesn't help either, nor does adjusting it through the Control Panel.
I have tried fiddling with my Power Options in the Control Panel and disabling adaptive brightness. I have tried several different driver versions for my GPU, a GeForce 9600M GT. None of this has helped.
In Windows 7, however, the brightness controls work fine. If I want to adjust my brightness for 8.1, I have to boot into 7, change the brightness there, and then boot back into 8.1, where it will keep whatever brightness setting I was using in 7.
Does anyone have any ideas on how to fix this? Is there some messed-up thing in the Registry? Is my GPU's firmware maybe just not compatible with Windows 8? I took a look at TechPowerUp's repository of GPU BIOSes, but it appears I already have the most recent one.
My Computer
System One
-
- OS
- Windows 8.1 Pro x64
- Computer type
- Laptop
- System Manufacturer/Model
- Acer Aspire 8930-6442
- CPU
- Intel Core 2 Duo T6400 (Penryn 2.0 GHz)
- Motherboard
- Acer MB.ASZ0B.001 (Intel PM45 Chipset)
- Memory
- Micron 4 GB DDR3-1066 (runs at 800 MHz 6-6-6-15)
- Graphics Card(s)
- NVIDIA GeForce 9600M GT 1 GB
- Sound Card
- Realtek ALC889X
- Monitor(s) Displays
- Samsung LNT184HT01-A01 (18.4")
- Screen Resolution
- 1680x945, 60 Hz
- Hard Drives
- Seagate Momentus 5400.6 500 GB 5400 RPM SATA II
- PSU
- Targus APA32US
- Cooling
- Acer 60.AP50N.003
- Keyboard
- Acer KB.INT00.297
- Mouse
- Logitech M215 + Synaptics TouchPad
- Internet Speed
- 15 Mbps down/1 Mbps up (cable)
- Browser
- Google Chrome
- Antivirus
- Windows Defender
