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Can't change screen brightness with Intel x5-E8000 iGPU

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GWeiss
Posts: 1
Joined: 2022-12-31 08:20

Can't change screen brightness with Intel x5-E8000 iGPU

#1 Post by GWeiss »

Hi,

I'm trying to change screen brightness on Debian buster non-free live ISO running on an "Acer Aspire Switch 10" with "Atom/Celeron/Pentium Processor x5-E8000/J3xxx/N3xxx" iGPU using i915 driver.

/sys/class/backlight/ contains directories acpi_video0 through acpi_video7. I tried changing the value in the brightness file in each of those directories, but the screen brightness didn't change.

I tried booting with acpi_backlight=video, acpi_backlight=vendor, acpi_backlight=none, i915.enable_dpcd_backlight=1 kernel parameters, but none of them worked (some of them actually caused /sys/class/backlight/ to be empty).

How can I make it work?

Thanks!

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