NetBSD Problem Report #60788

From drew@kludge.localdomain  Fri Sep 25 09:31:25 2026
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Date: Fri, 25 Sep 2026 11:23:11 +0200 (CEST)
From: drew@ddevault.org
Reply-To: drew@ddevault.org
To: gnats-bugs@NetBSD.org
Subject: dmesg spam from umodem0 on ThinkPad T490s
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X-From4GNATS: "drew@ddevault.org via gnats" <gnats-admin@NetBSD.org>

>Number:         60788
>Category:       kern
>Synopsis:       umodem0 device frequently reconnects and spams the console
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Fri Sep 25 09:35:00 +0000 2026
>Last-Modified:  Sun Nov 01 00:54:53 +0000 2026
>Originator:     drew@ddevault.org
>Release:        NetBSD 11.0_RC7
>Organization:

>Environment:
 System: NetBSD kludge 11.0_RC7 NetBSD 11.0_RC7 (GENERIC) #0: Wed Jul 22 05:26:24 UTC 2026 mkrepro@mkrepro.NetBSD.org:/usr/src/sys/arch/amd64/compile/GENERIC amd64 Linux
 Architecture: unknown
 Machine: amd64
>Description:

 On a ThinkPad T490s on a standard NetBSD installation, booting up causes lines
 similar to the following to be written to the console/dmesg every few seconds:

 ucom0: detached
 umodem0: detached
 umodem0: at uthub port 7 (addr 6) disconnected
 umodem0 at uhub1 port 7 configuration 1 interface 2
 umodem0: FIBOCOM (0x2cb7) L830-EB (0x0210), rev 2.00/3.33, addr 10, iclass 2/2
 umodem0: data interface 3, has no CM over data, has break
 ucom0 at umodem0 portno 1

>How-To-Repeat:

>Fix:


>Release-Note:

>Audit-Trail:

Responsible-Changed-From-To: gnats-admin->kern-bug-people
Responsible-Changed-By: dholland@NetBSD.org
Responsible-Changed-When: Sun, 01 Nov 2026 00:54:53 +0000
Responsible-Changed-Why:
Fix up mangled PR


>Unformatted:

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