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@xxxxxxxxxxxxxxxxxxxxxx Reporter: nelg@xxxxxxxxxxxxxxxxxxxx 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. -- You are receiving this mail because: You are watching the assignee of the bug.
