ACPI: OSI: Add DMI quirk for Acer Aspire One D255

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[ Upstream commit 5ede902062 ]

The screen backlight turns off during boot (specifically during udev device
initialization) when returning true for _OSI("Windows 2009").

Analyzing the device's DSDT reveals that the firmware takes a different
code path when Windows 7 is reported, which leads to the backlight shutoff.
Add a DMI quirk to invoke dmi_disable_osi_win7 for this model.

Signed-off-by: Sofia Schneider <sofia@schn.dev>
Link: https://patch.msgid.link/20260223025240.518509-1-sofia@schn.dev
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

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Sofia Schneider 2026-02-22 23:52:40 -03:00 • committed by Greg Kroah-Hartman

parent e03d7bddf0

commit 8c61a746f7

1 changed files with 13 additions and 0 deletions

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drivers/acpi/osi.c

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