The Lenovo Ideapad Z570 (which is an Acer in disguise like some other Ideapads) has a broken acpi_video interface and is too old for the acpi-video code to automatically prefer the native backlight interface, so add a quirk for it. Note that this cannot be done with a quirk in the vendor backlight driver as is the normal way to fix this as the Z570 offers both acer-wmi and ideapad-laptop vendor backlight interfaces, so this would require the same quirk in 2 places which is the wrong thing to do. BugLink: https://bugzilla.redhat.com/show_bug.cgi?id=1187004 Signed-off-by: Hans de Goede <hdegoede@xxxxxxxxxx> --- drivers/acpi/video.c | 17 +++++++++++++++++ 1 file changed, 17 insertions(+) diff --git a/drivers/acpi/video.c b/drivers/acpi/video.c index 9817b52..70a7ec3 100644 --- a/drivers/acpi/video.c +++ b/drivers/acpi/video.c @@ -419,6 +419,12 @@ static int __init video_disable_native_backlight(const struct dmi_system_id *d) return 0; } +static int __init video_force_native_backlight(const struct dmi_system_id *d) +{ + use_native_backlight_dmi = 2; + return 0; +} + static struct dmi_system_id video_dmi_table[] __initdata = { /* * Broken _BQC workaround http://bugzilla.kernel.org/show_bug.cgi?id=13121 @@ -560,6 +566,17 @@ static struct dmi_system_id video_dmi_table[] __initdata = { DMI_MATCH(DMI_PRODUCT_NAME, "XPS L521X"), }, }, + + /* Non win8 machines which need native backlight nevertheless */ + { + /* https://bugzilla.redhat.com/show_bug.cgi?id=1187004 */ + .callback = video_force_native_backlight, + .ident = "Lenovo Ideapad Z570", + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), + DMI_MATCH(DMI_PRODUCT_NAME, "102434U"), + }, + }, {} }; -- 2.3.1 -- 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
