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I have a laptop with intel+nvidia hybrid graphics, and I was adjusting the brightness with nvidia_wmi_ec_backlight. Now if I try to change the brightness level (directly by writing to sysfs or using KDE brightness control), the sysfs brightness value changes but the real brightness stays at max.
I use linux-lts kernel and nvidia-open driver. The issue persists with a regular linux kernel with a regular nvidia driver, also tried using the 535xx nvidia driver but no luck so far.
Last edited by yataro (2024-05-27 11:10:28)
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acpi_backlight=video solved the issue for me.
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With acpi_backlight=native I got smoother backlight control with intel_backlight.
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wanted to confirm setting acpi_backlight to either video or native worked for me on my razer laptop model RZ09-0367
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