On Tuesday 31 July 2012 12:17:05 Alex Deucher wrote: > On Tue, Jul 31, 2012 at 12:03 PM, Pali Rohár <pali.rohar@xxxxxxxxx> wrote: > > 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. > > 0 only turns off the backlight, not the panel itself. Is the > backlight still partially on or is it just the actual panel > (timing and image)? > > Alex I looked at display again and 0 only turn backlight off (or adjust minimum value). If I look at display correctly (in dark room) I can recognize that display is still on and I can see window manager decorations (but text is not readable). Value 255 when ALS is on has same effect as 0 - adjust minimum value (instead maximum). -- Pali Rohár pali.rohar@xxxxxxxxx
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