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([2a01:41e3:2182:7300:e578:7a53:5a19:5ce8]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-427ea5b3b45sm8635578f8f.11.2025.10.18.23.34.27 for (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Sat, 18 Oct 2025 23:34:28 -0700 (PDT) Message-ID: <1393a6c5-3430-49cb-95e6-b18c0f5328b0@gmail.com> Date: Sun, 19 Oct 2025 08:34:27 +0200 Precedence: bulk X-Mailing-List: linux-usb@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Content-Language: en-US To: USB list From: Julian Sikorski Subject: USB A 3.0 port on Asus Zenbook not recognising the TipToi pen Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Hello, disclaimer: this is not linux-specific as Windows 11 also fails to recognise the devices, but maybe someone has ideas regarding the causes here. I have two TipToi Pens by Ravensburger. These are recognised as 04d6:e101 Mentor Graphics usbdisk when plugged into USB C port via USB C to micro B cable. When plugged into the USB A port, the following messages are reported into the journal: Okt 19 08:19:08 kernel: usb usb3-port2: Cannot enable. Maybe the USB cable is bad? Okt 19 08:19:09 kernel: usb usb3-port2: Cannot enable. Maybe the USB cable is bad? Okt 19 08:19:09 kernel: usb usb3-port2: attempt power cycle Okt 19 08:19:10 kernel: usb usb3-port2: Cannot enable. Maybe the USB cable is bad? Okt 19 08:19:11 kernel: usb usb3-port2: Cannot enable. Maybe the USB cable is bad? Okt 19 08:19:11 kernel: usb usb3-port2: unable to enumerate USB device I have two pens. I tried two cables delivered with them, as well as a different USB A to micro B cable I had. All exhibit the same issue. Does anyone have any ideas what could be the problem? My first guess is that both the laptop and the pen are slightly off-spec in some strange way, which causes them not to work together. The USB A slot on the laptop works fine with other devices, and the pen works with the laptop if connected to USB C. Best regards, Julian