From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-vs1-f48.google.com (mail-vs1-f48.google.com [209.85.217.48]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 7AD1A3195EF for ; Mon, 23 Feb 2026 03:00:12 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.217.48 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1771815613; cv=none; b=tV1X4iEJBLJ/RbBYKlQl4EMJzoCGo9fYPYvjATxj/qu9Jx3U9luYE9Szl9CBi1QnsqTDvigHaiApnYLSOicCtp8tGMD7gByNa5i6jsckgGrxoVnxp/qstFLyX3J/MNNto/DnPsp9em+dm0OsN/qP/P6uQQlXs45UujJqQLfiW7Q= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1771815613; c=relaxed/simple; bh=TcPNtRb5A1yeA4Zt9SmEvC6AzD9oGYQCKWzbcU6iGfo=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=b9WYG5SzFAs3FsECddn//WEI2nkuCjNxPnLRx3tDaEsJrxsnbjGGyyzC1IOhDy/+Mdwvjzi+eKDY/egkSIVe64X+kfCqM7xZC6zoXw/HJTVd1Z7U2Pv8xomY6frCRM+c6PtM8cWRd9215tcCujKE1llLO7kV/BWKn7V7GXoUljE= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=schn.dev; spf=pass smtp.mailfrom=gmail.com; arc=none smtp.client-ip=209.85.217.48 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=schn.dev Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Received: by mail-vs1-f48.google.com with SMTP id ada2fe7eead31-5fc66c49d03so2003602137.0 for ; Sun, 22 Feb 2026 19:00:12 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1771815611; x=1772420411; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:x-gm-gg:x-gm-message-state:from:to:cc:subject:date :message-id:reply-to; bh=ZWMw43NcxNljR5M74M/NPTGXoUVL43oQx/hWfbaifB4=; b=LPhTItwmgyzznvR69HMmRc8CYGz+YW4EZrlqr5LgoKAWPq9SEg7amJSme02vBJY/wQ ixd+2oxiKZJyuRvXXKiY/+rlDgW6wP0NqS7s+gvsjNri4tsvEC2ESRyRYht/RodCMKvB jIDie4+qPD9nBj+Pw47ZDLJHlFIWbzeXJOPS0vTGjgSPmWCDA/vsW+Nlh6P91/4+IXzb YfaGgArfgHtmjaYtRBs1Pd363UEW8eQibaUmql8yZILaRMA0AMgCYhbSzsNzZlaNjEOF jqpnHl9XQa+wTyzgXGEWgmf3YOBZQr98rwwrRG5X0zBYrjjo7uCiu9wqRaUmOZfBltKV 7qQg== X-Forwarded-Encrypted: i=1; AJvYcCUbFGP0iSvuPK91gNn5fV14H8mdDQ92+11WKEoasujtEm0x3WG0Xp9Gk5KLZFCg3wMN7/o5Dc0+yOYV@vger.kernel.org X-Gm-Message-State: AOJu0YzMLaJ7uC4aL19DbwbtMPf0jXkjP2EXYOxp7CB4RLOuUNBiQGe1 6G8hl3l/V4+hwlBMKVfgpnreW408zeLMheRK0rHMRPzXqd1FkZIVIFl5 X-Gm-Gg: AZuq6aLiZDi662rBBz4cgC0yO+CT0dO0dgD7KV0Vup6tatRLu8bw1LOvPr+UL2y9e5Y u5cs2X/mkQs7xC8S+xtamAvrkgIpGihny8Id9YDuX+kM/470VhsQh0rR/equC39iHFP+IoggjN6 th8YpHwchk9yjDq1JyG9LdQPYfFSZKKEXb0KhZl22TLJv1MWcnEqa4weaNJY0mculna2P1jxkP5 HqgU0TCT0p73FxAEYqMJC21Q402ApthhhJblrt4agAuH/TildQzxjup7V4y+YFxVOl9HPUu3WzC OsvWkWm5NViIEbMq/eJuIaVcJb6GbrD7TJdgkCXuTDmH935uVqX9mesbyZC8em5Scg3blYc0FBJ okonNYdT+VdurkMpkKqw1bQ2DUN47Y7OrPPR0V5WDKiTGfBMExqv9nks2Y7lN6b4sWybi9WnTc8 JwSZcgBWjyh/QHSaNiHQtZLfbIE+bwgR31lnzp3OQBRW2n67OhIrV6KP/JZr+B98zH X-Received: by 2002:a05:6102:a4f:b0:5f5:256d:c0cd with SMTP id ada2fe7eead31-5feb31340a8mr3713768137.34.1771815611483; Sun, 22 Feb 2026 19:00:11 -0800 (PST) Received: from desktop-sofia ([2804:14d:ba4e:824c:1d87:d278:461d:1a0e]) by smtp.gmail.com with ESMTPSA id ada2fe7eead31-5feb61fde14sm6534388137.3.2026.02.22.19.00.09 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 22 Feb 2026 19:00:11 -0800 (PST) From: Sofia Schneider To: rafael@kernel.org Cc: lenb@kernel.org, linux-acpi@vger.kernel.org, Sofia Schneider Subject: [PATCH] ACPI: OSI: Add DMI quirk for Acer Aspire One D255 Date: Sun, 22 Feb 2026 23:52:40 -0300 Message-ID: <20260223025240.518509-1-sofia@schn.dev> X-Mailer: git-send-email 2.53.0 Precedence: bulk X-Mailing-List: linux-acpi@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 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 --- drivers/acpi/osi.c | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/drivers/acpi/osi.c b/drivers/acpi/osi.c index f2c943b934be..9470f1830ff5 100644 --- a/drivers/acpi/osi.c +++ b/drivers/acpi/osi.c @@ -389,6 +389,19 @@ static const struct dmi_system_id acpi_osi_dmi_table[] __initconst = { }, }, + /* + * The screen backlight turns off during udev device creation + * when returning true for _OSI("Windows 2009") + */ + { + .callback = dmi_disable_osi_win7, + .ident = "Acer Aspire One D255", + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "Acer"), + DMI_MATCH(DMI_PRODUCT_NAME, "AOD255"), + }, + }, + /* * The wireless hotkey does not work on those machines when * returning true for _OSI("Windows 2012") -- 2.53.0