I believe this is a problem with ACPI and device detection on windows. After you re-enable the video card drivers brightness began working again.
Go to Device Manager, under View select "Show Hidden Devices", go to the "Display Adaptors" and disable all video card drivers, go to the section "Monitors" and delete all monitors listed (windows can reinstall them if needed). I finally figured out the problem and this appears to be a general windows 8.1 problem not specific to ASUS computers.īasically if Windows installs too many Monitor drivers in the device manager it somehow causes windows not to be able to adjust the brightness. Restart your system and check it out, let us know if this resolves it or not. You can go to the official Asus Driver Support webpage and install the following,ġ- ATKACPI driver and hotkey-related utilities (Expand ATK - Version V)Ģ- Keyboard Device Filter Utility (Expand Utilities - Version V1.0.0.5) Well you might have uninstalled the Hotkey related software which came along withit, nonetheless it would have helped a lot more, if we knew what did you removed and what did you did in-order to fix the Horizontal Lines issue? Has anyone else experienced this issue?ĭoes anyone know of a piece of software I may have uninstalled that could cause this to happen? I'd rather not reinstall the OS if I don't have to. I have tried installing the oldest drivers Asus recommends on the download page but I have not had success. This means the hotkeys don't work, windows can't change the brightness, and I have turned off all of the possible places that auto brightness could be active noted on this link: Throught the course of troubleshooting an issue with horizontal lines on the screen (which I was able to fix) I could not change the brightness at all on the notebook. When I first got my notebook the brightness was working just fine. Join Date Dec 2013 Reputation 61 Posts 1,653 Samsung SSD 960 EVO 250GB x2 -=-=- LITEONIT LCS-256M6S GSync IPS 75HZ -=-=- Chi Mei 60Hz (Overclocked to 85Hz) Realtek High Definition Audio / NVIDIA High Definition Audio G752VS (U3E1) -=-=- ASUSTeK COMPUTER INC.
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