From: bugzilla-daemon@bugzilla.kernel.org
To: linux-usb@vger.kernel.org
Subject: [Bug 210565] New: Regression: Upgrading from 5.9.8 to 5.9.9 stops ME906s LTE mobile modem from working.
Date: Tue, 08 Dec 2020 20:22:17 +0000 [thread overview]
Message-ID: <bug-210565-208809@https.bugzilla.kernel.org/> (raw)
https://bugzilla.kernel.org/show_bug.cgi?id=210565
Bug ID: 210565
Summary: Regression: Upgrading from 5.9.8 to 5.9.9 stops ME906s
LTE mobile modem from working.
Product: Drivers
Version: 2.5
Kernel Version: 5.9.9
Hardware: Intel
OS: Linux
Tree: Mainline
Status: NEW
Severity: high
Priority: P1
Component: USB
Assignee: drivers_usb@kernel-bugs.kernel.org
Reporter: nelg@linuxsolutions.co.nz
Regression: No
The device: 12d1:15c1 Huawei Technologies Co., Ltd. ME906s LTE M.2 Module
has been working perfectly, up until kernel release 5.9.9.
On 5.9.9, I get errors like:
Dec 09 08:40:25 x1 NetworkManager[531]: <info> [1607456425.9474] device
(cdc-wdm0): Activation: successful, device activated.
Dec 09 08:40:41 x1 ModemManager[570]: [/dev/cdc-wdm0] unexpected port hangup!
Dec 09 08:40:41 x1 ModemManager[570]: [/dev/cdc-wdm0] channel destroyed
Dec 09 08:40:41 x1 ModemManager[570]: <info> [modem2] connection to mbim-proxy
for /dev/cdc-wdm0 lost, reprobing
Dec 09 08:40:41 x1 NetworkManager[531]: <info> [1607456441.0644] device
(cdc-wdm0): state change: activated -> unmanaged (reason 'removed',
sys-iface-state: 'removed')
Dec 09 08:41:06 x1 kernel: cdc_ether 1-2:2.0 wwan0: register 'cdc_ether' at
usb-0000:00:14.0-2, Mobile Broadband Network Device, 02:1e:10:1f:00:00
Dec 09 08:41:06 x1 kernel: usbcore: registered new interface driver cdc_ether
Dec 09 08:41:06 x1 kernel: cdc_ether 1-2:2.0 wwp0s20f0u2c2: renamed from wwan0
Dec 09 08:41:07 x1 kernel: cdc_ether 1-2:2.0 wwp0s20f0u2c2: unregister
'cdc_ether' usb-0000:00:14.0-2, Mobile Broadband Network Device
It works fine if I downgrade to 5.9.8.
I have also tested 5.9.10, 5.9.11 and 5.9.12, all of which this device no
longer works.
I can see commit ebc047afe9d2f04fdfd81d74e6c32bb3671b4670 in the change log
that touches the cdc driver, so wonder if this is related.
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next reply other threads:[~2020-12-08 20:23 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-12-08 20:22 bugzilla-daemon [this message]
2020-12-09 21:13 ` [Bug 210565] Regression: Upgrading from 5.9.8 to 5.9.9 stops ME906s LTE mobile modem from working bugzilla-daemon
2020-12-13 17:27 ` bugzilla-daemon
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