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Wysocki" Cc: Len Brown , Hans de Goede , linux-acpi@vger.kernel.org, =?UTF-8?q?Jan=20Sch=C3=A4r?= , stable@vger.kernel.org Subject: [PATCH] ACPI: video: Add backlight=native quirk for Dell OptiPlex 7770 AIO Date: Sat, 11 Apr 2026 11:26:06 +0200 Message-ID: <20260411092606.47925-1-jan@jschaer.ch> X-Mailer: git-send-email 2.51.0 Precedence: bulk X-Mailing-List: linux-acpi@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The Dell OptiPlex 7770 AIO needs the same quirk as the 7760 AIO. The backlight can be controlled with the native controller, intel_backlight, but not with dell_uart_backlight. I dumped the DSDT using acpidump, acpixtract and iasl, and confirmed that it contains the DELL0501 device. When loading the dell_uart_backlight driver with `rmmod dell_uart_backlight`, `modprobe dell_uart_backlight dyndbg`, it reports "Firmware version: GL_Re_V18". Fixes: cd8e468efb4f ("ACPI: video: Add Dell UART backlight controller detection") Cc: stable@vger.kernel.org Signed-off-by: Jan Schär --- drivers/acpi/video_detect.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/drivers/acpi/video_detect.c b/drivers/acpi/video_detect.c index 4cf74f173c78..4a2132ae28b4 100644 --- a/drivers/acpi/video_detect.c +++ b/drivers/acpi/video_detect.c @@ -878,6 +878,14 @@ static const struct dmi_system_id video_detect_dmi_table[] = { DMI_MATCH(DMI_PRODUCT_NAME, "OptiPlex 7760 AIO"), }, }, + { + .callback = video_detect_force_native, + /* Dell OptiPlex 7770 AIO */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), + DMI_MATCH(DMI_PRODUCT_NAME, "OptiPlex 7770 AIO"), + }, + }, /* * Models which have nvidia-ec-wmi support, but should not use it. base-commit: 591cd656a1bf5ea94a222af5ef2ee76df029c1d2 -- 2.51.0