On Tuesday, April 08, 2014 10:49:17 AM Aaron Lu wrote: > On 04/04/2014 10:44 PM, Stephen Chandler Paul wrote: > > Like many other Windows 8 laptops the ThinkPad Helix's backlight has a > > broken ACPI interface and can only be properly adjusted by using the > > video card's native backlight control. This adds the ThinkPad Helix to > > the list of laptops affected with this issue so that > > video.use_native_backlight is enabled by default. > > It would be good to attach your acpidump so that we know for sure and if > one day we need to remove this entry, we can verify its table. > > Bug 51231 is tracking this problem and mostly are thinkpad laptops, so > please attach your acpidump and dmi there, thanks. > https://bugzilla.kernel.org/show_bug.cgi?id=51231 I've queued this patch up for the next ACPI pull request. We'll revert it if it turns out to be incorrect. > > Signed-off-by: Stephen Chandler Paul <thatslyude@xxxxxxxxx> > > --- > > drivers/acpi/video.c | 8 ++++++++ > > 1 file changed, 8 insertions(+) > > > > diff --git a/drivers/acpi/video.c b/drivers/acpi/video.c > > index 48c7e8a..8b6990e 100644 > > --- a/drivers/acpi/video.c > > +++ b/drivers/acpi/video.c > > @@ -488,6 +488,14 @@ static struct dmi_system_id video_dmi_table[] __initdata = { > > }, > > }, > > { > > + .callback = video_set_use_native_backlight, > > + .ident = "Thinkpad Helix", > > + .matches = { > > + DMI_MATCH(DMI_SYS_Vhttps://bugzilla.kernel.org/show_bug.cgi?id=51231ENDOR, "LENOVO"), > > + DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad Helix"), > > + }, > > + }, > > + { > > .callback = video_set_use_native_backlight, > > .ident = "Dell Inspiron 7520", > > .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 -- I speak only for myself. Rafael J. Wysocki, Intel Open Source Technology Center. -- 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
