Linux: ttyUSB not detected after upgrade to 5.4.66+
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?
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
md5-9be6485f14ef655ee05de1b449b13f81
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
md5-9be6485f14ef655ee05de1b449b13f81
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
md5-9be6485f14ef655ee05de1b449b13f81
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
md5-82bb6276c652905f90a18a4647779f41
pi@raspberrypi:~ $ uname -a
Linux raspberrypi 5.4.65-v7l+ #1341 SMP Tue Sep 15 13:13:32 BST 2020 armv7l GNU/Linux
md5-9be6485f14ef655ee05de1b449b13f81
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
md5-9be6485f14ef655ee05de1b449b13f81
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
md5-9be6485f14ef655ee05de1b449b13f81
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
ensarkarabudak
👍1
All 7 comments
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.
dbaba
on 30 Nov 2020
any ideas?
@bmork @jhovold
ensarkarabudak
on 1 Dec 2020
On Mon, Nov 30, 2020 at 10:21:06PM -0800, Ensar wrote:
Please report this to [email protected] and include the output
of "lsusb -v" (and/or the more compact output of "usb-devices") for the
device in question. It doesn't hurt CCing me and Bjørn.
jhovold
on 1 Dec 2020
👍1
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
bmork
on 1 Dec 2020
Does anyone know what firmware version this fix(USB: serial: option: fix Quectel BG96 matching) will be available on?
ensarkarabudak
on 10 Dec 2020
👍1
It has been backported to all stable trees and should show up in the
next release.
jhovold
on 10 Dec 2020
👍3
❤1
This issue fixed in 5.10+ versions.
Thanks, @jhovold @bmork
ensarkarabudak
on 25 Dec 2020
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Most helpful comment
It has been backported to all stable trees and should show up in the
next release.