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Message-Id: <20201103203301.398052297@linuxfoundation.org>
Date: Tue, 3 Nov 2020 21:36:00 +0100
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-kernel@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
stable@...r.kernel.org, Alex Hung <alex.hung@...onical.com>,
"Rafael J. Wysocki" <rafael.j.wysocki@...el.com>
Subject: [PATCH 5.4 112/214] ACPI: video: use ACPI backlight for HP 635 Notebook
From: Alex Hung <alex.hung@...onical.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@...r.kernel.org>
Signed-off-by: Alex Hung <alex.hung@...onical.com>
[ rjw: Changelog edits ]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@...el.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.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 */
{
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