On these laptops, the ACPI video is not functional, and very unlikely to be fixed by the vendor. Note that intel_backlight works for some of these laptops, and the backlight from samsung-laptop always work.
The good news is that newer laptops have functional ACPI video device and won't end up growing this list. Signed-off-by: Corentin Chary <[email protected]> --- drivers/acpi/video_detect.c | 49 +++++++++++++++++++++++++++++++++++++++++++ 1 files changed, 49 insertions(+), 0 deletions(-) diff --git a/drivers/acpi/video_detect.c b/drivers/acpi/video_detect.c index 45d8097..66be45e 100644 --- a/drivers/acpi/video_detect.c +++ b/drivers/acpi/video_detect.c @@ -132,6 +132,53 @@ find_video(acpi_handle handle, u32 lvl, void *context, void **rv) return AE_OK; } +/* Force to use vendor driver when the ACPI device is known to be + * buggy */ +static int video_detect_force_vendor(const struct dmi_system_id *d) +{ + acpi_video_support |= ACPI_VIDEO_BACKLIGHT_DMI_VENDOR; + return 0; +} + +static struct dmi_system_id video_detect_dmi_table[] = { + { + .callback = video_detect_force_vendor, + .ident = "N150P", + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."), + DMI_MATCH(DMI_PRODUCT_NAME, "N150P"), + DMI_MATCH(DMI_BOARD_NAME, "N150P"), + }, + }, + { + .callback = video_detect_force_vendor, + .ident = "N145P/N250P/N260P", + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."), + DMI_MATCH(DMI_PRODUCT_NAME, "N145P/N250P/N260P"), + DMI_MATCH(DMI_BOARD_NAME, "N145P/N250P/N260P"), + }, + }, + { + .callback = video_detect_force_vendor, + .ident = "N150/N210/N220", + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."), + DMI_MATCH(DMI_PRODUCT_NAME, "N150/N210/N220"), + DMI_MATCH(DMI_BOARD_NAME, "N150/N210/N220"), + }, + }, + { + .callback = video_detect_force_vendor, + .ident = "NF110/NF210/NF310", + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."), + DMI_MATCH(DMI_PRODUCT_NAME, "NF110/NF210/NF310"), + DMI_MATCH(DMI_BOARD_NAME, "NF110/NF210/NF310"), + }, + }, +}; + /* * Returns the video capabilities of a specific ACPI graphics device * @@ -164,6 +211,8 @@ long acpi_video_get_capabilities(acpi_handle graphics_handle) * ACPI_VIDEO_BACKLIGHT_DMI_VENDOR; *} */ + + dmi_check_system(video_detect_dmi_table); } else { status = acpi_bus_get_device(graphics_handle, &tmp_dev); if (ACPI_FAILURE(status)) { -- 1.7.5.4 -- To unsubscribe from this list: send the line "unsubscribe platform-driver-x86" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
