On Wed, 2010-10-06 at 21:42 -0700, AbeOwitz wrote: > Been trying to learn ACPI via the acpi_call kernel module.
IMO (from a perspective of acpi_call maker) - not a good way to learn ACPI :) For more detailed info, look at http://www.acpica.org/documentation/ > I experimented with the DSDT.dsl output, and found two commands that > brighten and darken the laptop LCD. (Asus U43JC Ubuntu 10.10 RC > 64bit) > > echo "\_SB.PCI0.RP00.VGA.UPBL" > /proc/acpi/call > echo "\_SB.PCI0.RP00.VGA.DWBL" > /proc/acpi/call > > I've not found anything else useful. (Well, something messed up my > laptop enough to prevent it from turning back on. I had to remove the > battery and power before it would power up again. :( ) I am not sure if it is OK to test and call every single method in your DSDT, because there can be some side effects. For example, if I call my \_SB.PCI0.PEG1.GFX0._OFF several times, the settings for my GPU changes in BIOS - so that the dedicated GPU is always turned off. When I want to use it in Windows, I have to turn it back on in BIOS. > Nor do I seem to be able to pass parameters. According to the > acpi_call source code, I should be able to pass integers or hex > integers separated by spaces. i.e. echo "\_SB.PCI0.RP00.VGA.DWBL > 0x00" > /proc/acpi/call but this always fails. You can get the last error back, by reading /proc/acpi/call, for example: cat /proc/acpi/call _______________________________________________ Mailing list: https://launchpad.net/~hybrid-graphics-linux Post to : [email protected] Unsubscribe : https://launchpad.net/~hybrid-graphics-linux More help : https://help.launchpad.net/ListHelp
