On Tuesday 31 July 2012 17:49:32 Luca Tettamanti wrote: > I'm putting back the CC and adding Alex. > > On Tue, Jul 31, 2012 at 5:07 PM, Pali Rohár <pali.rohar@xxxxxxxxx> wrote: > > Thanks, now working. When I write to acpi video brightness > > file it change brightness and in dmesg is: > > > > [ 47.200998] [drm:radeon_atif_handler], event, device_class > > = video, type = 0xd0 > > [ 47.201102] [drm:radeon_atif_get_sbios_requests], SBIOS > > pending requests: 0x80 > > [ 47.201104] [drm:radeon_atif_handler], ATIF: 1 pending > > SBIOS requests > > [ 47.201105] [drm:radeon_atif_handler], Changing brightness > > to 11 > > Great! I'll send an updated patch to Alex soon. > > > I think that acpi only sent event about brightness key > > pressed, because nothing happened when I pressed it. > > > > Also for windows is needed special HP application (hp hotkey) > > for brightness keys. Without it brightness keys not working > > too... > I've looked at hp-wmi: the hotkey is indeed dispatched via WMI > (hp-wmi) so you need something in userspace (KDE, Gnome, etc) > to respond to that key press. > No, when I rmmod hp-wmi brightness keys still generate events. And when I disable acpi then brightness keys do not generate events but adjust brightness automatically (by BIOS). I think that hp-wmi on my notebook only handle bluetooth & wifi rfkills and ALS switch. All button working without hp-wmi too. > > And there is one problem with /sys/class/backlight/radeon_bl. > > When I enable Ambient Light Sensor which auto adjust > > brightness based on sensor data, writing value 0 (min) or > > 255 (max) to /sys/class/backlight/radeon_bl/brightness turn > > off display. > Ok, that's weird. 0 turns off the panel by design, 255 should > not... But when ALS is disabled 0 did not turn display off. > > All > > other values (1-254) are OK (adjust brightness level). When I > > turn off Ambient Light Sensor (via hp-wmi kernel module) then > > values 0 and 255 also set brightness level (min and max). My > > suggestion is to convert value 0 to 1 and 255 to 254 to > > prevent this problem. > > No idea what's going on here... might be some weird vendor > magic. The WMI code is rather obscure... > > Luca ACPI/WMI cannot change brightness, see this what doing that ALS function: http://lists.freedesktop.org/archives/dri-devel/2012- March/020416.html -- Pali Rohár pali.rohar@xxxxxxxxx
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