Cannot power off the monitor through Power Management

[lukchiuwing]

Hi,

I am running R1 KDE. I've set the time out to turn off the monitor in Power Management (no screen saver enabled). However, the monitor only goes blank but not power off. Back light is still on and has signal according to the indicator.

I've also tried the 'xset dpms force off', but no luck.

Any ideas?

Thanks in advance.