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gauthma

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Registered: 2010-02-16

Posts: 222

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Screen dimmed when returning from suspend

So after the last update, when returning from suspend, the screen is dimmed. I had not configured this, and checking back the relevant system settings confirmed that this should not be happening. After a bit of googling I discovered the culprit. In /sys/class/backlight/ I have two folders (intel_backlight and acpi_video0), each of contains (among others) the following two files: brightness and max_brightness.

So far so good (I think: I don't know if it's supposed to exist two folders inside backlight, but anyway...). In the case of intel_backlight both files had the same value (4296), but with acpi_video0 the max was 10, but the other file contained the value 1. I increased it to 10, and sure enough the problem was solved.

Is this a bug? The files in question were not owned by any package... Also, it is not obvious what in the update could have caused this. The closest thing to a culprit is mesa, but that's a long shot, I think... Can anyone shed some light?