On HP m4 lapops, BIOS reports minimum backlight on boot and causes backlight to dim completely. This ignores the initial backlight values and set to max brightness. Buglink: https://bugs.launchpad.net/bugs/1184501 Signed-off-by: Alex Hung <alex.hung@xxxxxxxxxxxxx> --- drivers/acpi/video.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/drivers/acpi/video.c b/drivers/acpi/video.c index 5b32e15..d0937ab 100644 --- a/drivers/acpi/video.c +++ b/drivers/acpi/video.c @@ -464,6 +464,14 @@ static struct dmi_system_id video_dmi_table[] __initdata = { DMI_MATCH(DMI_PRODUCT_NAME, "HP 1000 Notebook PC"), }, }, + { + .callback = video_ignore_initial_backlight, + .ident = "HP Pavilion m4", + .matches = { + DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"), + DMI_MATCH(DMI_PRODUCT_NAME, "HP Pavilion m4 Notebook PC"), + }, + }, {} }; -- 1.8.1.2 -- 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
