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What's Toshiba Acpi Driver
Brief introduction about Toshiba Acpi Driver.
By Ryan on August 16, 2009
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What's Toshiba Acpi Driver
Toshiba Acpi Drive is only intended to provide the extra support for ACPI functionality specific to Toshiba laptops. In other words, this driver is not intended to cover standard ACPI functions such as shutdown, reboot, suspend, hibernate, battery info, etc. Such generic functions are being supported by the ACPI4Linux project and the Software Suspend 2 project.
This driver also does not work on all Toshiba laptops, particularly those models which seem to have a BIOS or other firmware which was not developed by Toshiba itself. New reverse engineering work will have to be done on these machines, or Toshiba will have to disclose the necessary details.
Driver Use
If all is well, the directory toshiba should appear under /proc/acpi. Within that, proc files exist for examining and changing the state of various devices. Generally any user may view the state, but changing state requires root privilege.
As an example, let's look at the LCD device status (lines that start with $ are entered by the user, the other lines are output):
$ cat /proc/acpi/toshiba/lcd
brightness: 6
brightness_levels: 8
Now let's change the LCD brightness:
$ echo "brightness:4" > /proc/acpi/toshiba/lcd
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