On 08/01/2013 04:12 PM, Borislav Petkov wrote: > On Thu, Aug 01, 2013 at 09:13:35AM +0800, Aaron Lu wrote: >> Can you please run acpi_listen and then press the Fn-Fx key, see if the >> events are correctly sent out? > > Like this? > > # acpi_listen > video/brightnessdown BRTDN 00000087 00000000 > video/brightnessup BRTUP 00000086 00000000 > video/brightnessdown BRTDN 00000087 00000000 > video/brightnessup BRTUP 00000086 00000000 > video/brightnessdown BRTDN 00000087 00000000 > video/brightnessup BRTUP 00000086 00000000 > video/brightnessdown BRTDN 00000087 00000000 > video/brightnessup BRTUP 00000086 00000000 > video/brightnessdown BRTDN 00000087 00000000 > ^C Yes, so the event is correctly sent out. > >> From the bug page: >> https://bugzilla.kernel.org/show_bug.cgi?id=51231#c80 >> I got the impression that both the acpi_video interface and the vendor >> interface thinkpad_screen are broken. So adding this cmdline here works >> suggests that either thinkpad_screen works or thinkpad vendor driver >> doesn't get loaded or doesn't create that interface for some reason. >> >> Alternatively, if the intel_backlight interface works(highly possible), >> you can use xorg.conf to specify the that backlight interface for X. >> >> Section "Device" >> Option "Backlight" "intel_backlight" >> Identifier "Card0" >> Driver "intel" >> BusID "PCI:0:2:0" >> EndSection > > Yeah, that didn't work *but* manually writing to both: > > /sys/class/backlight/acpi_video0/brightness > > and > > /sys/class/backlight/intel_backlight/brightness > > works. Err...we have the event sent out on hotkey press and the interface also works, but still, using hotkey to adjust brightness level is broken... I just found an old acer laptop that has similar issue(or even worse: on X starts, an almost black screen is shown and hotkey adjust doesn't work), I'll look into this. > > The ranges are different, though: > > intel_backlight/actual_brightness:1000 > intel_backlight/bl_power:0 > intel_backlight/brightness:1000 > intel_backlight/max_brightness:4437 > intel_backlight/type:raw > > acpi_video0/actual_brightness:41 > acpi_video0/bl_power:0 > acpi_video0/brightness:41 > acpi_video0/max_brightness:100 > acpi_video0/type:firmware Yes, different interface has different brightness ranges and a value in one range may turn out to be the same actual brightness level of another value in another range. > > I guess I need to write me a dirty script for now ... :-) :-) > > Thanks guys. > Thanks, Aaron _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/intel-gfx
