Cannot Adjust Brightness in Windows 8.1 - IdeaPad Z400

It is impossible to change the screen brightness with the hotkey (F11 and F12), or even with the slider in settings. It is happening after updating to Windows 8.1.


Affected configurations

The above symptom may occur on the following systems:
IdeaPad Z400

The above symptom may occur under the following operating system:
Microsoft Windows 8.1



Installing Intel card driver alone may already fix the issue, however, it is recommended to install the drivers stated below to ensure that we address this brightness issue in Windows 8.1.


1. Please seletct the Intel or/and Nvidia driver to install according to your machine hardware configuration.

2. The drivers provided here may not be updated as provided by Windows 8.1 but it is still working fine.

If you are unable to find what you are looking for, please do try the following options:
1. Lenovo Assisted Search
2. Product usage and general troubleshooting tips
3. Lenovo Support Forum
4. Technical Support Call Centre

Country Availability
Alias ID : IN20131217-001
Document ID : HT080665
Legacy Document ID : IN20131217-001
Last Updated :
Copyright © Lenovo 2013, all rights reserved
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