Ubuntu
hal package

  1. Bug #43572
  2. Comment #9

Comment 9 for bug 43572

Revision history for this message
In , Aaron Whitehouse (aaron-whitehouse) wrote :

https://launchpad.net/distros/ubuntu/+source/hal/+bug/43572

Dell laptops are able to change the brightness settings in the Bios but this
does not talk properly to HAL.

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, all we need is a bit of HAL
glue for the smbios stuff.

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

Some links for anyone interested:
http://www.ussg.iu.edu/hypermail/linux/kernel/0602.0/2221.html
http://lists.us.dell.com/pipermail/libsmbios-devel/2006-February/thread.html#177
http://linux.dell.com/libsmbios/main/