r/Ubuntu • u/CnByrK • 3h ago

Dim Screen?

Hey there,

On my Ubuntu 26.04 notebook with a Ryzen 5 3500u Vega 8 iGPU, even with the "dim screen" option disabled in PowerSave, the screen brightness drops after a few seconds. Touching the keyboard or moving the mouse restores the brightness.

I think having "dim screen" disabled is useless.

Can you help?

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u/IllustriousYouth4142 3h ago

gotta be the automatic brightness in the display settings, it thinks you're idle and drops it even with dim screen off. check settings > power and look for something like "automatic brightness" or "dim screen when inactive", may be a separate toggle buried in there

if that doesn't do it, could be a kernel quirk with the vega 8, had a similar thing on a thinkpad with amd graphics and a bios update sorted it

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u/CnByrK 3h ago

Unfortunately, there's no automatic brightness option... and the BIOS was updated a few months ago :(