Hi, On 05/12/2014 10:16 AM, Aaron Lu wrote: > On 05/12/2014 03:57 PM, Hans de Goede wrote: >> Like all of the other *30 ThinkPad models, the W530 has a broken acpi-video >> backlight control. Note in order for this to actually fix things on the >> ThinkPad W530 the commit titled: >> "nouveau: Don't check acpi_video_backlight_support() before registering backlight" >> is also needed. > > Note that the backlight_device_registered(raw) may return false as when > acpi_video_verify_backlight_support is called, the nouveau driver may > not run yet. > > Previously, we don't know anything about how laptops with nvidia graphics > card alone control backlight in Win8, so the existing solution doesn't > consider this case. If nvidia graphics system also should favour native > backlight control interface in Win8, the current solution needs > modifications. Hmm, how is this dealt with in the case of the intel gfx driver ? Regards, Hans > > Thanks, > Aaron > >> >> https://bugzilla.redhat.com/show_bug.cgi?id=1093171 >> >> Cc: stable@xxxxxxxxxxxxxxx >> Signed-off-by: Hans de Goede <hdegoede@xxxxxxxxxx> >> --- >> drivers/acpi/video.c | 8 ++++++++ >> 1 file changed, 8 insertions(+) >> >> diff --git a/drivers/acpi/video.c b/drivers/acpi/video.c >> index 34198b2..6a2099d 100644 >> --- a/drivers/acpi/video.c >> +++ b/drivers/acpi/video.c >> @@ -520,6 +520,14 @@ static struct dmi_system_id video_dmi_table[] __initdata = { >> }, >> }, >> { >> + .callback = video_set_use_native_backlight, >> + .ident = "ThinkPad W530", >> + .matches = { >> + DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), >> + DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad W530"), >> + }, >> + }, >> + { >> .callback = video_set_use_native_backlight, >> .ident = "ThinkPad X1 Carbon", >> .matches = { >> > -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
