On Wed, Apr 14, 2010 at 3:24 PM, Chris Bagwell <chris@xxxxxxxxxxxxxx> wrote: > On Wed, Apr 14, 2010 at 1:16 AM, Corentin Chary > <corentin.chary@xxxxxxxxx> wrote: >> On Wed, Apr 14, 2010 at 4:34 AM, Chris Bagwell <chris@xxxxxxxxxxxxxx> wrote: >>> Hi all, >>> >>> I've seen the following issue reported on various web pages but not sure if >>> it was directly reported. First up, you guys know about issue with acpi_osi >>> of "Windows 2009" disables eeepc_backend and thats were eeepc_wmi comes in. >>> >>> There is a secondary bug though if you boot with acpi_osi="!Windows 2009" >>> (or "Linux"). The ACPI driver will take control of backlight controls with >>> Fn-F5/F6. Those keys will work but has issues with Gnome and other user >>> processes. >>> >>> Anything that uses any of the /sys/* interfaces to control backlight do not >>> work correctly. When software cycles threw levels, the behavior is kinda >>> odd. It will cycle each time you dim to something like >>> Bright->Dim->Bight->Off->Bright->etc. Also, Gnome will give no feedback >>> because eeepc_laptop discards the events and it will not make it to >>> /dev/input/event*. And last, the status of current brightness is never >>> updated under /sys/* correctly which confuses Gnome as well. >>> >>> The secondary work around is to add acpi_backlight=vendor to boot options. >>> Then eepc_backlight takes charge and life is good. Gnome gives visual >>> feedback and dimmer works as expected. >>> >>> Baring a firmware fix from Asus, would it be possible to enable some sort of >>> backlist for using ACPI backlight support and have 1005P's use eeepc_laptop? >>> >>> Chris >> >> Hi, >> Did you try the eeepc-wmi ? It's the long term solution and it don't need >> any extra kernel parameters. Yong Wang just added backlight support to it. >> >> http://git.kernel.org/?p=linux/kernel/git/mjg59/platform-drivers-x86.git;a=shortlog;h=refs/heads/for_linus >> > > I havent't tried it yet but it looks like it has same issue that > eeepc-laptop does. If ACPI reports it handles backlight then > eeepc-wmi disables controlling of backlight and I'd get buggy ACPI > version. > > Does Yong happen to be on this email list? I don't think, but he reads platform-x86 which is now CCed Are you sure that the backlight behavior is the same with and without acpi_osi=Linux ? -- Corentin Chary http://xf.iksaif.net -- To unsubscribe from this list: send the line "unsubscribe platform-driver-x86" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
