Dear Corentin, 2012/8/7 Corentin Chary <[email protected]>: > On Tue, Aug 7, 2012 at 11:26 AM, AceLan Kao <[email protected]> wrote: >> Hi, >> >> The new commit[1] will call acpi_video_dmi_promote_vendor() to add >> the ACPI_VIDEO_BACKLIGHT_DMI_VENDOR flag to acpi_video_support. >> So, asus-wmi.ko should be loaded before video.ko, or calling that >> function is in vain. >> Since loading video.ko will check those flags, we have to add the flag >> before it's being checked. >> >> I'm wondering is there a way to add this kind of dependency in the code, so >> that >> depmod will help to build the dependency in modules.dep >> >> 1. 272c77d asus-wmi: control backlight power through WMI, not ACPI >> >> Best regards, >> AceLan Kao. > > Hi, > > I don't really understand what you mean. > Currently: > - acpi_video_dmi_promote_vendor() is called to set the flags > - video.ko flags are checked to find which backlight should be used > (in order to respect acpi_video="" parameters if user specified them) > - if necessary, acpi_video_unregister() is called > > So yes, the acpi backlight will be register, and then un-registered, > but there is no way to fix that (or with a big blacklist in video.ko, > and we don't want that). I saw asus-wmi will call acpi_video_unregister(), but it looks like it doesn't call backlight_device_unregister() as well.
The problem is that the /sys/class/backlight/acpi_video0 directory still exists and the gnome-settings-daemon will choose acpi_video0 for the brightness functions But, if asus-wmi is loaded before video, then video won't call backlight_device_register(), since the flag is already be set. > > Thanks, > > -- > Corentin Chary > http://xf.iksaif.net -- Chia-Lin Kao(AceLan) http://blog.acelan.idv.tw/ E-Mail: acelan.kaoATcanonical.com (s/AT/@/) -- To unsubscribe from this list: send the line "unsubscribe platform-driver-x86" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
