I'm having a problem with the screen brightness in the settings screen, scrollbar in brightness as much as I change the brightness does not change, remains at most ... so the file in /sys/class/backlight/acpi_video0/ brightness as much as I change from 7 to 1, the maximum brightness continues.

I am using a Compal NTUC0, and I've done a BIOS update but the problem continues. Anyone can help me?

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This question should instead be filed as a bug report, and as such is off-topic, thanks! Instructions on filing a bug report are here. – coversnail May 14 at 7:07
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closed as off topic by fossfreedom May 14 at 9:21

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