[Bug 43572] Dell Laptops don't talk to ACPI about brightness correctly

Tue May 9 05:05:53 UTC 2006

Public bug reported:

Affects: hal (Ubuntu)
       Severity: Normal
       Priority: (none set)
     Assignee: Richard Hughes
         Status: Unconfirmed

Description:
This was discovered in Bug #38531. It seems that Dell laptops are able
to change the brightness settings in the Bios but this does not talk
properly to ACPI, HAL or anything else.

>From http://bugzilla.gnome.org/show_bug.cgi?id=337580 :
"Some code needs to be written to do this - there's no ACPI method to do it, but
it can be done via an SMBios call from userspace."

It means that the system does not know, and cannot change, the
brightness of the monitor.

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Dell Laptops don't talk to ACPI about brightness correctly
https://launchpad.net/bugs/43572