[opensuse] Disabling display power management

Hi All,

I'm trying to disable the display power management, with absolutely no success
at all. I'm running 11.3, but have had this problem in various earlier
releases on various machines.

None of the settings in the power management module of System Settings seems
to have any effect. I have tried setting the kernel boot parameters apm=off
and acpi=off (which used to be necessary some years ago on some machines ...)

Basically, it's very annoying to have the screen blanking every 10 minutes,
especially when streaming TV or watching a DVD. So, does anyone know where I
might find the necessary setting(s) to disable the display power management
entirely?

I'm running 11.3 x86_64 with a Radeon HD 4350 graphics card.

Thanks

Dylan
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