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From: Julian Sikorski <belegdol@gmail.com>
To: USB list <linux-usb@vger.kernel.org>
Subject: USB A 3.0 port on Asus Zenbook not recognising the TipToi pen
Date: Sun, 19 Oct 2025 08:34:27 +0200	[thread overview]
Message-ID: <1393a6c5-3430-49cb-95e6-b18c0f5328b0@gmail.com> (raw)

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

             reply	other threads:[~2025-10-19  6:34 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2025-10-19  6:34 Julian Sikorski [this message]
2025-10-19 15:43 ` USB A 3.0 port on Asus Zenbook not recognising the TipToi pen Alan Stern
2025-10-21 14:44   ` Julian Sikorski
2025-10-21 16:01     ` Alan Stern
2025-10-22 13:25       ` Julian Sikorski
2025-10-22 13:59         ` Alan Stern
2025-10-22 16:35           ` Julian Sikorski
2025-10-22 18:39             ` Alan Stern

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