* Joey Lee -- Sunday 08 May 2011: > æ åï2011-05-07 æ 22:22 +0200ïMelchior FRANZ æåï > > It has turned out that acpi key events seem to be handled correctly > > and even the state of /sys/class/backlight/acer-wmi/brightness is > > That's interesting for acer-wmi generated brightness interface when this > machine declare acpi brightness interface in DSDT. I'm sorry to give contradicting info. Yesterday I saw a subdir acer-wmi (or acer_wmi) in /sys/class/backlight/ during one of my tests (with/without acer_wmi, with/without acpi_osi=Linux). Now I left acpi_osi=Linux away and allow acer_wmi, and it's subdir acpi_video0. Next time I'll make notes. > Does it work to you direct control brightness by access > by /sys/class/backlight/acer-wmi/brightness ? No. A number written to this virtual file is accepted and remembered, but it doesn't actually change the brightness. It takes setpci to do that. > As I remember, use setpci to control brightness is not recommended > because BIOS or ACPI will also touch brightness level. That will be > better control brightness by the function that was provided by BIOS. > e.g. ACPI or WMI interface, or direct control by EC. Well, sounds plausible. And I wouldn't do it if it weren't the only way at the moment. :-) > That means that will be better fix your Fn key control brightness like > before, you just need press Fn key to change brightness and don't need > have any workaround. OK. I have added a lot of debug messages to intel_panel.c yesterday. All it told me was that it seems to work correctly wiht acpi_osi=Linux. Except that it doesn't actually change the brightness. Without acpi_osi the functions aren't called at all and none of my messages showed up. > Looks like current status is we try to fix bko#31522 but the patch > causes your brightness no work by press Fn key even with acpi_osi=Linux. > Does it right? The history is: with acpi_osi=Linux everything worked with 2.6.38-rc8. With 2.6.38 the screen stayed black. The patch that only ignored lbpc=0 worked (IIRC) including key adjustment. Later patches broke keys. > replace acpi_osi=Linux by acpi_osi="!Windows 2006" > > Does it also works to you for backlight control? No, doesn't work. m. _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/dri-devel
