Laptop: Acer Travelmate 6492 Linux Kernel with i915 Kernel-Mode-Setting

What steps will reproduce the problem? 1. modprobe -v acer_wmi

What is the expected output? What do you see instead? [ 5553.518046] acer-wmi: Acer Laptop ACPI-WMI Extras [ 5554.206261] usb 7-1: new full speed USB device using uhci_hcd and address 3 [ 5554.407399] Bluetooth: Generic Bluetooth USB driver ver 0.6 [ 5554.407694] usbcore: registered new interface driver btusb [ 5554.480212] Bluetooth: BNEP (Ethernet Emulation) ver 1.3 [ 5554.480215] Bluetooth: BNEP filters: protocol multicast [ 5554.491812] Bluetooth: SCO (Voice Link) ver 0.6 [ 5554.491814] Bluetooth: SCO socket layer initialized

No Error Message is seen, the backlight subsystem is present:

ls -l /sys/class/backlight/acer-wmi/

insgesamt 0 -r--r--r-- 1 root root 4096 1. Jun 09:59 actual_brightness -rw-r--r-- 1 root root 4096 1. Jun 09:59 bl_power -rw-r--r-- 1 root root 4096 1. Jun 09:59 brightness lrwxrwxrwx 1 root root 0 1. Jun 09:59 device -> ../../../acer-wmi -r--r--r-- 1 root root 4096 1. Jun 08:50 max_brightness drwxr-xr-x 2 root root 0 1. Jun 09:59 power lrwxrwxrwx 1 root root 0 1. Jun 08:50 subsystem -> ../../../../../class/backlight -rw-r--r-- 1 root root 4096 1. Jun 08:50 uevent

But changing the Values in "brightness" doesn't afffect anything.

What version of acer_acpi are you using? On which distribution and kernel version? 2.6.24, Vanilla Kernel and Gentoo patched version Also older Versions doesn't work. Last working kernel was 2.6.29

Please provide any additional information below. see attached dpmidecode, dsdt table, kernel config

Thanks! ;-)

tried kernel parameter "acpi_backlight=vendor|video" but doesn't changed anything