| From b226faab4e7890bbbccdf794e8b94276414f9058 Mon Sep 17 00:00:00 2001 |
| From: Alex Hung <alex.hung@canonical.com> |
| Date: Sun, 13 Sep 2020 16:34:03 -0600 |
| Subject: ACPI: video: use ACPI backlight for HP 635 Notebook |
| |
| From: Alex Hung <alex.hung@canonical.com> |
| |
| commit b226faab4e7890bbbccdf794e8b94276414f9058 upstream. |
| |
| The default backlight interface is AMD's radeon_bl0 which does not |
| work on this system, so use the ACPI backlight interface on it |
| instead. |
| |
| BugLink: https://bugs.launchpad.net/bugs/1894667 |
| Cc: All applicable <stable@vger.kernel.org> |
| Signed-off-by: Alex Hung <alex.hung@canonical.com> |
| [ rjw: Changelog edits ] |
| Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> |
| Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
| |
| --- |
| drivers/acpi/video_detect.c | 9 +++++++++ |
| 1 file changed, 9 insertions(+) |
| |
| --- a/drivers/acpi/video_detect.c |
| +++ b/drivers/acpi/video_detect.c |
| @@ -282,6 +282,15 @@ static const struct dmi_system_id video_ |
| DMI_MATCH(DMI_PRODUCT_NAME, "530U4E/540U4E"), |
| }, |
| }, |
| + /* https://bugs.launchpad.net/bugs/1894667 */ |
| + { |
| + .callback = video_detect_force_video, |
| + .ident = "HP 635 Notebook", |
| + .matches = { |
| + DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), |
| + DMI_MATCH(DMI_PRODUCT_NAME, "HP 635 Notebook PC"), |
| + }, |
| + }, |
| |
| /* Non win8 machines which need native backlight nevertheless */ |
| { |
