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ttyUSB not detected after upgrade to 5.4.66+ #3964

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ensarkarabudak opened this issue Nov 18, 2020 · 7 comments
Closed

ttyUSB not detected after upgrade to 5.4.66+ #3964

ensarkarabudak opened this issue Nov 18, 2020 · 7 comments

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@ensarkarabudak
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ensarkarabudak commented Nov 18, 2020 •
edited

I’ve run into an issue with the Quectel BG96 module. I do not have anything on ttyUSB3 and 2.
It appears as though some changes in 5.4.66 have affected how USB2-USB3 is treated?

ChangeLog-5.4.66:

Change rules for EC21, EC25, BG96 and EG95 to match vendor specific
serial functions only, to prevent binding to class functions. Require
2 endpoints on ff/ff/ff functions, avoiding the 3 endpoint QMI/RMNET
network functions.

System
Raspbery Pi 4 Model B or 3B+

pi@raspberrypi:~ $ cat /etc/rpi-issue
Raspberry Pi reference 2020-08-20
Generated using pi-gen, https://github.com/RPi-Distro/pi-gen, 9a3a10bf1019ebb2d59053564dc6b90068bad27d, stage4

pi@raspberrypi:~ $ vcgencmd version
Nov 17 2020 13:40:08 
Copyright (c) 2012 Broadcom
version 20c430d6cf4343ed95afba07c4735b7c587a4c83 (clean) (release) (start)

pi@raspberrypi:~ $ uname -a
Linux raspberrypi 5.4.77-v7l+ #1371 SMP Tue Nov 17 13:35:27 GMT 2020 armv7l GNU/Linux

Logs

pi@raspberrypi:~ $ lsusb
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 007: ID 2c7c:0296 Quectel Wireless Solutions Co., Ltd. BG96 CAT-M1/NB-IoT modem
Bus 001 Device 002: ID 2109:3431 VIA Labs, Inc. Hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub


pi@raspberrypi:~ $ lsusb -t
/:  Bus 02.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/4p, 5000M
/:  Bus 01.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/1p, 480M
    |__ Port 1: Dev 2, If 0, Class=Hub, Driver=hub/4p, 480M
        |__ Port 1: Dev 7, If 0, Class=Vendor Specific Class, Driver=option, 480M
        |__ Port 1: Dev 7, If 1, Class=Vendor Specific Class, Driver=option, 480M
        |__ Port 1: Dev 7, If 2, Class=Vendor Specific Class, Driver=, 480M
        |__ Port 1: Dev 7, If 3, Class=Vendor Specific Class, Driver=, 480M
        |__ Port 1: Dev 7, If 4, Class=Vendor Specific Class, Driver=qmi_wwan, 480M


pi@raspberrypi:~ $ dmesg
[  757.680431] usb 1-1.1: USB disconnect, device number 5
[  757.681345] option1 ttyUSB0: GSM modem (1-port) converter now disconnected from ttyUSB0
[  757.681477] option 1-1.1:1.0: device disconnected
[  757.687264] option1 ttyUSB1: GSM modem (1-port) converter now disconnected from ttyUSB1
[  757.687410] option 1-1.1:1.1: device disconnected
[  757.688625] qmi_wwan 1-1.1:1.4 wwan0: unregister 'qmi_wwan' usb-0000:01:00.0-1.1, WWAN/QMI device
[  760.586253] usb 1-1.1: new high-speed USB device number 6 using xhci_hcd
[  760.720216] usb 1-1.1: New USB device found, idVendor=2c7c, idProduct=0296, bcdDevice= 0.00
[  760.720235] usb 1-1.1: New USB device strings: Mfr=3, Product=2, SerialNumber=4
[  760.720252] usb 1-1.1: Product: Qualcomm CDMA Technologies MSM
[  760.720267] usb 1-1.1: Manufacturer: Qualcomm, Incorporated
[  760.720283] usb 1-1.1: SerialNumber: 5af3af3d
[  760.731565] option 1-1.1:1.0: GSM modem (1-port) converter detected
[  760.731933] usb 1-1.1: GSM modem (1-port) converter now attached to ttyUSB0
[  760.732472] option 1-1.1:1.1: GSM modem (1-port) converter detected
[  760.732799] usb 1-1.1: GSM modem (1-port) converter now attached to ttyUSB1
[  760.736519] qmi_wwan 1-1.1:1.4: cdc-wdm0: USB WDM device
[  760.737401] qmi_wwan 1-1.1:1.4 wwan0: register 'qmi_wwan' at usb-0000:01:00.0-1.1, WWAN/QMI device, 16:9c:93:b3:12:dc
[ 1694.517102] usb 1-1.1: USB disconnect, device number 6
[ 1694.517990] option1 ttyUSB0: GSM modem (1-port) converter now disconnected from ttyUSB0
[ 1694.518123] option 1-1.1:1.0: device disconnected
[ 1694.519010] option1 ttyUSB1: GSM modem (1-port) converter now disconnected from ttyUSB1
[ 1694.519136] option 1-1.1:1.1: device disconnected
[ 1694.520294] qmi_wwan 1-1.1:1.4 wwan0: unregister 'qmi_wwan' usb-0000:01:00.0-1.1, WWAN/QMI device
[ 1699.471305] usb 1-1.1: new high-speed USB device number 7 using xhci_hcd
[ 1699.605396] usb 1-1.1: New USB device found, idVendor=2c7c, idProduct=0296, bcdDevice= 0.00
[ 1699.605416] usb 1-1.1: New USB device strings: Mfr=3, Product=2, SerialNumber=4
[ 1699.605433] usb 1-1.1: Product: Qualcomm CDMA Technologies MSM
[ 1699.605449] usb 1-1.1: Manufacturer: Qualcomm, Incorporated
[ 1699.605464] usb 1-1.1: SerialNumber: 5af3af3d
[ 1699.624867] option 1-1.1:1.0: GSM modem (1-port) converter detected
[ 1699.625233] usb 1-1.1: GSM modem (1-port) converter now attached to ttyUSB0
[ 1699.625780] option 1-1.1:1.1: GSM modem (1-port) converter detected
[ 1699.626116] usb 1-1.1: GSM modem (1-port) converter now attached to ttyUSB1
[ 1699.629701] qmi_wwan 1-1.1:1.4: cdc-wdm0: USB WDM device
[ 1699.630746] qmi_wwan 1-1.1:1.4 wwan0: register 'qmi_wwan' at usb-0000:01:00.0-1.1, WWAN/QMI device, 16:9c:93:b3:12:dc

pi@raspberrypi:~ $ dmesg | grep tty
[  757.681345] option1 ttyUSB0: GSM modem (1-port) converter now disconnected from ttyUSB0
[  757.687264] option1 ttyUSB1: GSM modem (1-port) converter now disconnected from ttyUSB1
[  760.731933] usb 1-1.1: GSM modem (1-port) converter now attached to ttyUSB0
[  760.732799] usb 1-1.1: GSM modem (1-port) converter now attached to ttyUSB1
[ 1694.517990] option1 ttyUSB0: GSM modem (1-port) converter now disconnected from ttyUSB0
[ 1694.519010] option1 ttyUSB1: GSM modem (1-port) converter now disconnected from ttyUSB1
[ 1699.625233] usb 1-1.1: GSM modem (1-port) converter now attached to ttyUSB0
[ 1699.626116] usb 1-1.1: GSM modem (1-port) converter now attached to ttyUSB1

pi@raspberrypi:~ $ lsusb -v
Bus 001 Device 005: ID 2c7c:0296 Quectel Wireless Solutions Co., Ltd. BG96 CAT-M1/NB-IoT modem
Couldn't open device, some information will be missing
Device Descriptor:
  bLength                18
  bDescriptorType         1
  bcdUSB               2.00
  bDeviceClass            0 
  bDeviceSubClass         0 
  bDeviceProtocol         0 
  bMaxPacketSize0        64
  idVendor           0x2c7c Quectel Wireless Solutions Co., Ltd.
  idProduct          0x0296 BG96 CAT-M1/NB-IoT modem
  bcdDevice            0.00
  iManufacturer           3 
  iProduct                2 
  iSerial                 4 
  bNumConfigurations      1
  Configuration Descriptor:
    bLength                 9
    bDescriptorType         2
    wTotalLength       0x0091
    bNumInterfaces          5
    bConfigurationValue     1
    iConfiguration          1 
    bmAttributes         0xe0
      Self Powered
      Remote Wakeup
    MaxPower              500mA
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        0
      bAlternateSetting       0
      bNumEndpoints           2
      bInterfaceClass       255 Vendor Specific Class
      bInterfaceSubClass    255 Vendor Specific Subclass
      bInterfaceProtocol    255 Vendor Specific Protocol
      iInterface              0 
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x81  EP 1 IN
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0200  1x 512 bytes
        bInterval               0
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x01  EP 1 OUT
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0200  1x 512 bytes
        bInterval               0
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        1
      bAlternateSetting       0
      bNumEndpoints           2
      bInterfaceClass       255 Vendor Specific Class
      bInterfaceSubClass    255 Vendor Specific Subclass
      bInterfaceProtocol    255 Vendor Specific Protocol
      iInterface              0 
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x82  EP 2 IN
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0200  1x 512 bytes
        bInterval               0
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x02  EP 2 OUT
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0200  1x 512 bytes
        bInterval               0
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        2
      bAlternateSetting       0
      bNumEndpoints           3
      bInterfaceClass       255 Vendor Specific Class
      bInterfaceSubClass    255 Vendor Specific Subclass
      bInterfaceProtocol    255 Vendor Specific Protocol
      iInterface              0 
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x83  EP 3 IN
        bmAttributes            3
          Transfer Type            Interrupt
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0040  1x 64 bytes
        bInterval               5
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x84  EP 4 IN
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0200  1x 512 bytes
        bInterval               0
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x03  EP 3 OUT
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0200  1x 512 bytes
        bInterval               0
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        3
      bAlternateSetting       0
      bNumEndpoints           3
      bInterfaceClass       255 Vendor Specific Class
      bInterfaceSubClass    254 
      bInterfaceProtocol    255 
      iInterface              0 
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x85  EP 5 IN
        bmAttributes            3
          Transfer Type            Interrupt
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0040  1x 64 bytes
        bInterval               5
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x86  EP 6 IN
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0200  1x 512 bytes
        bInterval               0
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x04  EP 4 OUT
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0200  1x 512 bytes
        bInterval               0
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        4
      bAlternateSetting       0
      bNumEndpoints           3
      bInterfaceClass       255 Vendor Specific Class
      bInterfaceSubClass    255 Vendor Specific Subclass
      bInterfaceProtocol    255 Vendor Specific Protocol
      iInterface              0 
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x87  EP 7 IN
        bmAttributes            3
          Transfer Type            Interrupt
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0040  1x 64 bytes
        bInterval               5
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x88  EP 8 IN
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0200  1x 512 bytes
        bInterval               0
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x05  EP 5 OUT
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0200  1x 512 bytes
        bInterval               0

Bus 001 Device 004: ID 0424:7800 Standard Microsystems Corp. 
Couldn't open device, some information will be missing
Device Descriptor:
  bLength                18
  bDescriptorType         1
  bcdUSB               2.10
  bDeviceClass          255 Vendor Specific Class
  bDeviceSubClass         0 
  bDeviceProtocol       255 
  bMaxPacketSize0        64
  idVendor           0x0424 Standard Microsystems Corp.
  idProduct          0x7800 
  bcdDevice            3.00
  iManufacturer           0 
  iProduct                0 
  iSerial                 0 
  bNumConfigurations      1
  Configuration Descriptor:
    bLength                 9
    bDescriptorType         2
    wTotalLength       0x0027
    bNumInterfaces          1
    bConfigurationValue     1
    iConfiguration          0 
    bmAttributes         0xe0
      Self Powered
      Remote Wakeup
    MaxPower                2mA
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        0
      bAlternateSetting       0
      bNumEndpoints           3
      bInterfaceClass       255 Vendor Specific Class
      bInterfaceSubClass      0 
      bInterfaceProtocol    255 
      iInterface              0 
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x81  EP 1 IN
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0200  1x 512 bytes
        bInterval               0
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x02  EP 2 OUT
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0200  1x 512 bytes
        bInterval               0
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x83  EP 3 IN
        bmAttributes            3
          Transfer Type            Interrupt
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0010  1x 16 bytes
        bInterval               4

Bus 001 Device 003: ID 0424:2514 Standard Microsystems Corp. USB 2.0 Hub
Couldn't open device, some information will be missing
Device Descriptor:
  bLength                18
  bDescriptorType         1
  bcdUSB               2.00
  bDeviceClass            9 Hub
  bDeviceSubClass         0 
  bDeviceProtocol         2 TT per port
  bMaxPacketSize0        64
  idVendor           0x0424 Standard Microsystems Corp.
  idProduct          0x2514 USB 2.0 Hub
  bcdDevice            b.b3
  iManufacturer           0 
  iProduct                0 
  iSerial                 0 
  bNumConfigurations      1
  Configuration Descriptor:
    bLength                 9
    bDescriptorType         2
    wTotalLength       0x0029
    bNumInterfaces          1
    bConfigurationValue     1
    iConfiguration          0 
    bmAttributes         0xe0
      Self Powered
      Remote Wakeup
    MaxPower                2mA
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        0
      bAlternateSetting       0
      bNumEndpoints           1
      bInterfaceClass         9 Hub
      bInterfaceSubClass      0 
      bInterfaceProtocol      1 Single TT
      iInterface              0 
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x81  EP 1 IN
        bmAttributes            3
          Transfer Type            Interrupt
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0001  1x 1 bytes
        bInterval              12
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        0
      bAlternateSetting       1
      bNumEndpoints           1
      bInterfaceClass         9 Hub
      bInterfaceSubClass      0 
      bInterfaceProtocol      2 TT per port
      iInterface              0 
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x81  EP 1 IN
        bmAttributes            3
          Transfer Type            Interrupt
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0001  1x 1 bytes
        bInterval              12

Bus 001 Device 002: ID 0424:2514 Standard Microsystems Corp. USB 2.0 Hub
Couldn't open device, some information will be missing
Device Descriptor:
  bLength                18
  bDescriptorType         1
  bcdUSB               2.00
  bDeviceClass            9 Hub
  bDeviceSubClass         0 
  bDeviceProtocol         2 TT per port
  bMaxPacketSize0        64
  idVendor           0x0424 Standard Microsystems Corp.
  idProduct          0x2514 USB 2.0 Hub
  bcdDevice            b.b3
  iManufacturer           0 
  iProduct                0 
  iSerial                 0 
  bNumConfigurations      1
  Configuration Descriptor:
    bLength                 9
    bDescriptorType         2
    wTotalLength       0x0029
    bNumInterfaces          1
    bConfigurationValue     1
    iConfiguration          0 
    bmAttributes         0xe0
      Self Powered
      Remote Wakeup
    MaxPower                2mA
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        0
      bAlternateSetting       0
      bNumEndpoints           1
      bInterfaceClass         9 Hub
      bInterfaceSubClass      0 
      bInterfaceProtocol      1 Single TT
      iInterface              0 
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x81  EP 1 IN
        bmAttributes            3
          Transfer Type            Interrupt
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0001  1x 1 bytes
        bInterval              12
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        0
      bAlternateSetting       1
      bNumEndpoints           1
      bInterfaceClass         9 Hub
      bInterfaceSubClass      0 
      bInterfaceProtocol      2 TT per port
      iInterface              0 
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x81  EP 1 IN
        bmAttributes            3
          Transfer Type            Interrupt
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0001  1x 1 bytes
        bInterval              12

Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Couldn't open device, some information will be missing
Device Descriptor:
  bLength                18
  bDescriptorType         1
  bcdUSB               2.00
  bDeviceClass            9 Hub
  bDeviceSubClass         0 
  bDeviceProtocol         1 Single TT
  bMaxPacketSize0        64
  idVendor           0x1d6b Linux Foundation
  idProduct          0x0002 2.0 root hub
  bcdDevice            5.04
  iManufacturer           3 
  iProduct                2 
  iSerial                 1 
  bNumConfigurations      1
  Configuration Descriptor:
    bLength                 9
    bDescriptorType         2
    wTotalLength       0x0019
    bNumInterfaces          1
    bConfigurationValue     1
    iConfiguration          0 
    bmAttributes         0xe0
      Self Powered
      Remote Wakeup
    MaxPower                0mA
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        0
      bAlternateSetting       0
      bNumEndpoints           1
      bInterfaceClass         9 Hub
      bInterfaceSubClass      0 
      bInterfaceProtocol      0 Full speed (or root) hub
      iInterface              0 
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x81  EP 1 IN
        bmAttributes            3
          Transfer Type            Interrupt
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0004  1x 4 bytes
        bInterval              12

Additional context
I'm solving the problem by downgrading the kernel to 5.4.65.

The outputs after downgrading the kernel to 5.4.65:

pi@raspberrypi:~ $ uname -a
Linux raspberrypi 5.4.65-v7l+ #1341 SMP Tue Sep 15 13:13:32 BST 2020 armv7l GNU/Linux

pi@raspberrypi:~ $ uname -a
Linux raspberrypi 5.4.65-v7l+ #1341 SMP Tue Sep 15 13:13:32 BST 2020 armv7l GNU/Linux
pi@raspberrypi:~ $ lsusb
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 003: ID 2c7c:0296 Quectel Wireless Solutions Co., Ltd. BG96 CAT-M1/NB-IoT modem
Bus 001 Device 002: ID 2109:3431 VIA Labs, Inc. Hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

pi@raspberrypi:~ $ lsusb -t
/:  Bus 02.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/4p, 5000M
/:  Bus 01.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/1p, 480M
    |__ Port 1: Dev 2, If 0, Class=Hub, Driver=hub/4p, 480M
        |__ Port 1: Dev 3, If 0, Class=Vendor Specific Class, Driver=option, 480M
        |__ Port 1: Dev 3, If 1, Class=Vendor Specific Class, Driver=option, 480M
        |__ Port 1: Dev 3, If 2, Class=Vendor Specific Class, Driver=option, 480M
        |__ Port 1: Dev 3, If 3, Class=Vendor Specific Class, Driver=option, 480M
        |__ Port 1: Dev 3, If 4, Class=Vendor Specific Class, Driver=qmi_wwan, 480M


pi@raspberrypi:~ $ dmesg | grep tty
[    0.000000] Kernel command line: coherent_pool=1M 8250.nr_uarts=0 snd_bcm2835.enable_compat_alsa=0 snd_bcm2835.enable_hdmi=1 snd_bcm2835.enable_headphones=1  smsc95xx.macaddr=DC:A6:32:49:FB:39 vc_mem.mem_base=0x3ec00000 vc_mem.mem_size=0x40000000  console=ttyS0,115200 console=tty1 root=PARTUUID=3afdcacc-02 rootfstype=ext4 elevator=deadline fsck.repair=yes rootwait quiet splash plymouth.ignore-serial-consoles
[    0.001069] printk: console [tty1] enabled
[    1.178126] fe201000.serial: ttyAMA0 at MMIO 0xfe201000 (irq = 29, base_baud = 0) is a PL011 rev2
[   48.799825] usb 1-1.1: GSM modem (1-port) converter now attached to ttyUSB0
[   48.800271] usb 1-1.1: GSM modem (1-port) converter now attached to ttyUSB1
[   48.800707] usb 1-1.1: GSM modem (1-port) converter now attached to ttyUSB2
[   48.801194] usb 1-1.1: GSM modem (1-port) converter now attached to ttyUSB3
@dbaba
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dbaba commented Nov 30, 2020

I have the same issue with the v1.20201022 firmware.

It worked before in v1.20200819 release but no longer works in the following releases.

There's a change related to Quectel USB stuff in the option.c change logs. But unfortunately I don't have any idea of the relevance between the issue and the change.

@ensarkarabudak
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any ideas?
@bmork @jhovold

@jhovold
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jhovold commented Dec 1, 2020 via email

@bmork
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bmork commented Dec 1, 2020

Well, I found this now: https://lists.freedesktop.org/archives/libqmi-devel/2017-October/002509.html

And I see the problem: This device has two ff/ff/ff functions with 3 endpoints, where one of those is RMNET and the other is serial. This device ID should obviously not have been included in that patch. Sorry about that. I'll send you a partial revert shortly, @jhovold

There is also this ff/fe/ff function, which AFAIK is unique to this device? Weird

@ensarkarabudak
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Does anyone know what firmware version this fix(USB: serial: option: fix Quectel BG96 matching) will be available on?

@jhovold
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jhovold commented Dec 10, 2020 via email

@ensarkarabudak
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This issue fixed in 5.10+ versions.
Thanks, @jhovold @bmork

@fedefrancescon fedefrancescon mentioned this issue May 13, 2021
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@jhovold @bmork @dbaba @ensarkarabudak