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