On 05/06/2013 04:23 PM, Alex Hung wrote: > On HP 1000 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/1167760 I've checked the acpi dump from the bug page, it should be the same firmware problem which the following patch is meant to solve: http://www.spinics.net/lists/linux-acpi/msg47212.html commit 2c62333a408f5badd2d2ffd7177f95deeccc5ca4 Author: Aaron Lu <aaron.lu@xxxxxxxxx> Date: Wed Nov 6 09:07:10 2013 +0800 ACPI / video: Quirk initial backlight level 0 Possible to give it a test? It's in Rafael's linux-next branch: http://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm.git If confirmed, we can save an entry in the DMI table. Thanks, Aaron > > 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 c3932d0..5b32e15 100644 > --- a/drivers/acpi/video.c > +++ b/drivers/acpi/video.c > @@ -456,6 +456,14 @@ static struct dmi_system_id video_dmi_table[] __initdata = { > DMI_MATCH(DMI_PRODUCT_NAME, "HP Pavilion dm4 Notebook PC"), > }, > }, > + { > + .callback = video_ignore_initial_backlight, > + .ident = "HP 1000 Notebook PC", > + .matches = { > + DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"), > + DMI_MATCH(Drjw@sisk.plMI_PRODUCT_NAME, "HP 1000 Notebook PC"), > + }, > + }, > {} > }; > > -- 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
