Display Brightness Settings Lost After Restart
Information in this document applies to HP TouchSmart 300 and HP TouchSmart 600 Desktop PCs.
The display brightness setting reverts to 100% each time the PCs are restarted. This occurs with some versions of the HP Keyboard, ACPI Buttons and OSDs driver.
Resolve the issue by downloading and installing HP Keyboard, ACPI Buttons and OSDs Driver Update (sp44493) .