From: Jan Schär Date: Sat, 11 Apr 2026 09:26:06 +0000 (+0200) Subject: ACPI: video: Add backlight=native quirk for Dell OptiPlex 7770 AIO X-Git-Tag: v7.1-rc1~39^2^4~1 X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=ad7997f5a01af6f711fe6b6a2df578b964109d49;p=thirdparty%2Fkernel%2Flinux.git ACPI: video: Add backlight=native quirk for Dell OptiPlex 7770 AIO 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: All applicable Signed-off-by: Jan Schär Reviewed-by: Hans de Goede Link: https://patch.msgid.link/20260411092606.47925-1-jan@jschaer.ch Signed-off-by: Rafael J. Wysocki --- diff --git a/drivers/acpi/video_detect.c b/drivers/acpi/video_detect.c index 4cf74f173c785..4a2132ae28b4d 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.