Comment 18 for bug 333386

Marc-André Turcotte wrote:
> In the 2.6.29-1 mainline kernel, on jaunty, "grep -r ./proc/acpi/video"

You need the space between . and /proc/acpi/video otherwise the grep won't
work. The . is the search argument.

> gets stuck. I looked in that folder and there is no file in it. For he

If there are no files in that folder, that means there is no generic acpi
interface active. So the grep won't show anything anyway.

> dmsg part, i' not sure what I have to do, but raising or lowering the
> brightness didn't change the output of dmsg

The dmesg is useful to see whether acer-wmi gets loaded and probably what
messages it prints and maybe other things that might be interesting.

The backlight control for acer should be found under
/sys/devices/platform/acer-wmi/backlight/acer-wmi/
 From the code I am not completely sure how the nodes will be called, you can
help me with that. Does reading/writing there change the brightness?