From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 14F772F28EA for ; Wed, 22 Jul 2026 05:29:28 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784698169; cv=none; b=XPhNjQOhDARvLX6SOxRCmYteW4n6zOHmVyeENU/IDC1eMljWdsiQzjUF2BJFDcp21qFnorQK31R+lJdJjESDRNmxlcJP5etolT2JCc4pVDMcQkHD7IVQDjNSf8l/Sy+iAM1CWoWzGcBSlFCcEzug9AjQusk4cKUROQdv7l2yfZs= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784698169; c=relaxed/simple; bh=7imDamabQ0st7VaerNSwZAuWfrGW0HViNufdNQI8pEo=; h=From:To:Subject:Date:Message-ID:In-Reply-To:References: Content-Type:MIME-Version; b=hxMx4KGfFSdoZddrCqIp4Ndq+lV/MaIQoACE+z7M2rmE24CObnrrE4iu4gkeZ2WnpIxsxWqobx0B6+Z4biO7kBTrMkku3j+/HIsFKeFV5RpKpRadDUh8SNHIHXpgSe2axyXNxOkHn2p0BQp9nEH2IIWAGQRlPrWs+Yty54E+EeI= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=Cu+ZK0RG; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="Cu+ZK0RG" Received: by smtp.kernel.org (Postfix) with ESMTPS id 9B6EAC19425 for ; Wed, 22 Jul 2026 05:29:28 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1784698168; bh=7imDamabQ0st7VaerNSwZAuWfrGW0HViNufdNQI8pEo=; h=From:To:Subject:Date:In-Reply-To:References:From; b=Cu+ZK0RGvyHR5qkPhc2v4WFG/ZJjl3SBLUMh8ElZ6zZ74Vjr5oPniHpZjlsbrLYHx 63PcdoeeuOFA/zsTbJqrB6pYKsEyBrnJdOwdoYTYasH/o+AW5XbpVLswjPveJAYZup kTAlFvWcMWnmxNiS4A+C0Q/jqIBdAy36qbHtjVjUC28ELfpPI5MugBCOcn+D29WJII nqULmI7z6WgB0MZzyCyKWvs4QI/8rkK8OgVI+YKlnEjw2Tl72mXn4zTQEW3x223mAb KzKH7iXXavBEqxpCEqbJbxkgVKY2dQrbAbsUDIkJTfMqRTPOfW5+u482Z2jzqyyAUB KdOGkx7to/V8A== Received: by aws-us-west-2-korg-bugzilla-1.web.codeaurora.org (Postfix, from userid 48) id 867AFC433E1; Wed, 22 Jul 2026 05:29:28 +0000 (UTC) From: bugzilla-daemon@kernel.org To: linux-usb@vger.kernel.org Subject: [Bug 221776] HP OmniBook X Flip - Broken UCSI firmware / Slow charging Date: Wed, 22 Jul 2026 05:29:28 +0000 X-Bugzilla-Reason: None X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: AssignedTo drivers_usb@kernel-bugs.kernel.org X-Bugzilla-Product: Drivers X-Bugzilla-Component: USB X-Bugzilla-Version: 2.5 X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: greg@kroah.com X-Bugzilla-Status: NEW X-Bugzilla-Resolution: X-Bugzilla-Priority: P3 X-Bugzilla-Assigned-To: drivers_usb@kernel-bugs.kernel.org X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: Message-ID: In-Reply-To: References: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Bugzilla-URL: https://bugzilla.kernel.org/ Auto-Submitted: auto-generated Precedence: bulk X-Mailing-List: linux-usb@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 https://bugzilla.kernel.org/show_bug.cgi?id=3D221776 --- Comment #2 from Greg Kroah-Hartman (greg@kroah.com) --- On Tue, Jul 21, 2026 at 06:30:50PM +0000, bugzilla-daemon@kernel.org wrote: > https://bugzilla.kernel.org/show_bug.cgi?id=3D221776 >=20 > --- Comment #1 from David Del Sol (daviddelsol1998@gmail.com) --- > From: David > Date: Tue, 21 Jul 2026 11:30:00 -0500 > Subject: [PATCH] usb: typec: ucsi: Skip UCSI on HP OmniBook X Flip (broke= n EC > firmware) >=20 > The HP OmniBook X Flip (Ryzen AI 5 340) has a non-compliant UCSI > firmware in the embedded controller. The EC rejects all write/control > UCSI commands (SET_NOTIFICATION_ENABLE, PPM_RESET, etc.) while > accepting only read-only commands (GET_*). This causes the UCSI > subsystem to eventually corrupt the EC state, resulting in USB PD > negotiation falling back to 5V (only ~2W charging instead of 65W). >=20 > Add a DMI-based quirk to prevent the ucsi_acpi driver from binding > to this hardware. Use NULL driver_data to signal "broken firmware, > skip UCSI entirely". >=20 > The user-visible symptom is that with a 65W USB-C PD charger, the > battery charges at 2W instead of 25-30W after the first UCSI command > exchange. The workaround (removing this driver) has been verified > on multiple charge cycles. >=20 > Link: https://bugzilla.kernel.org/show_bug.cgi?id=3DXXXXX > Signed-off-by: David Please send this to the linux-usb mailing list, with a proper name, and we will be glad to review it there. thanks, greg k-h --=20 You may reply to this email to add a comment. You are receiving this mail because: You are watching the assignee of the bug.=