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 337CF4156C6 for ; Fri, 9 Oct 2026 15:41:39 +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=1791560500; cv=none; b=XfK0lQbtHV7cFkFSpJsOmi6zv1HC7QlBrmAekYUJkLlBPNdWjx3/XVKta4RdcEXGLOIBishLZgH4FB97NXqfHhS61p0/lSxu8sxWZuhCZrLi/eVXThBfBNEMWVAMoo1cZSN1srzCWnfMxe4Mi0FdzxkUesLuzmJ+LgzM5+G3pm0= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1791560500; c=relaxed/simple; bh=3uHroEKYm1P2X1XkTCIkLocjlcMuKbwyBaJoMwumvzo=; h=From:To:Subject:Date:Message-ID:In-Reply-To:References: Content-Type:MIME-Version; b=tSGlH+wnS410hCwytFQKLici9kLNfPDY05aEETwcMRZcH+VwIY2bKVtY43+H/dy/QROPwMVj0A4oXV1eONWLSafDWtbR1djwotBdZoO3M9Vjz3yBwFdIchAStD+7KT4g5q7pbTcrL8ryIusall2K2X+tXRTjNC+KJQ76tVWM438= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=Pk7fpdnW; 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="Pk7fpdnW" Received: by smtp.kernel.org (Postfix) with ESMTPS id B47E3C2BCF4 for ; Fri, 9 Oct 2026 15:41:39 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1791560499; bh=3uHroEKYm1P2X1XkTCIkLocjlcMuKbwyBaJoMwumvzo=; h=From:To:Subject:Date:In-Reply-To:References:From; b=Pk7fpdnWGpsNhSRSaXm+E6cwDNW3R4MkglHKiBwIL49Jq3hmolFZoErS0tjxkjX4Q VyRCtOQvDGWgAfGd+oGGFk59UwWTaa5baE7nu1ej6pLwqVbBs1tECvNDuFeJifK7rP sZhf3GiLy6opXkCAi0YpcaCqSeIhKZe1U3fsajjcc/3845a/77ZWU4pYfXV3zWSA25 7Douoe7pF4MkNA/Xrggkqp/JuwlOKVJxU/iEEbIC5OnqxM9+qFQBId9p5TsrQHGQoL pnHExebKZHFqmtGDWli1WFUCkoaFll8ExAw8PRFXaBjTXH7NnjExFRVyDccvb3czCH yy3NDrVdv/dkw== Received: by aws-us-west-2-korg-bugzilla-1.web.codeaurora.org (Postfix, from userid 48) id 979BFC4160E; Fri, 9 Oct 2026 15:41:39 +0000 (UTC) From: bugzilla-daemon@kernel.org To: linux-usb@vger.kernel.org Subject: [Bug 222021] Not charging via USB C after Kernel update "underpowered" Dell XPS + workaround Date: Fri, 09 Oct 2026 15:41:39 +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: splint.em85@gmail.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=3D222021 --- Comment #5 from SpliNter (splint.em85@gmail.com) --- Update: I'm now on 7.2.9-1-cachyos (not vanilla mainline, so I haven't tested 7.3-rc yet). On hotplug the charger now ends upcharging, but the state is unstable for a= few seconds. udevadmmonitor -s power_supply after plugging in the original Dell adapter shows within ~6 s: 4 change events for ucsi-source-psy-USBC000:003, 1 for AC and 2 for BAT0 (I saw "not charging" briefly, then charging, flipping twice). dmesg shows "ucsi_acpi USBC000:00: UCSI_GET_PDOS failed (-5)" not only at boot but on plug-in as well; the latest one (409.498) is logged right after the AC change event at 409.34, so it coincides with the hotplug. Earlier today it stayed "not charging" on the same kernel (at about 70% battery, it is allowed to charge up to 80%), so the problem is intermittent. I'm about to test mainline and patch today and report back. --=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.=