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http://bugzilla.opensuse.org/show_bug.cgi?id=907368
--- Comment #20 from Andrej Lazo
WMI hotkey is an unlikely target. It might provide something about brightness but only for old models. The newer models should give the key either via ACPI video bus or the normal i8042 serial I/O (aka PS/2 port). On openSUSE 13.1, it looks like that the former one took. But the behavior depends on BIOS, i.e. ACPI OSI string may influence somehow, so it's not really sure.
Try to find out the event device for video bus, and check whether the key comes with it.
Also, check the value in /sys/module/video/parameters/brightness_switch_enabled. If it's N, try to turn it on: echo 1 > /sys/module/video/parameters/brightness_switch_enabled and retest.
do you mean this? ####################### linux-b4vl:~ # evtest /dev/input/event5 Input driver version is 1.0.1 Input device ID: bus 0x19 vendor 0x0 product 0x6 version 0x0 Input device name: "Video Bus" Supported events: Event type 0 (EV_SYN) Event type 1 (EV_KEY) Event code 224 (KEY_BRIGHTNESSDOWN) Event code 225 (KEY_BRIGHTNESSUP) Event code 227 (KEY_SWITCHVIDEOMODE) Event code 241 (KEY_VIDEO_NEXT) Event code 242 (KEY_VIDEO_PREV) Event code 243 (KEY_BRIGHTNESS_CYCLE) Event code 244 (KEY_BRIGHTNESS_ZERO) Event code 245 (KEY_DISPLAY_OFF) Properties: Testing ... (interrupt to exit) ########## doesn't register -- You are receiving this mail because: You are on the CC list for the bug.