From: Jody Bruchon <jody@jodybruchon.com>
To: linux-kernel@vger.kernel.org
Cc: jody@jodybruchon.com
Subject: Help with Realtek RTL8156 USB 2.5G NIC not working and cdc_ncm syslog flooding
Date: Thu, 27 Aug 2020 12:46:49 -0400 [thread overview]
Message-ID: <dc255e58-b2dd-6b22-4e24-7a3591c64e27@jodybruchon.com> (raw)
Note: please CC me in replies since I'm not subscribed to LKML.
I have a RTL8156-based USB 3.0 to 2.5G NBASE-T ethernet adapter made by
Plugable and I'm using a recently compiled Linux 5.8.1 (I checked
changelogs up to the current 5.8.5 release and didn't see anything
relevant mentioned). It's supposed to work with the cdc_ncm driver, but
the sheer amount of syslog spam by cdc_ncm regardless of link state is
astonishing, and the adapter behaves erratically as well. This is the
log spam from one single second with the interface up but no network
cable attached:
[173944.031631] cdc_ncm 2-4:2.0 usb0: network connection: disconnected
[173944.063629] cdc_ncm 2-4:2.0 usb0: network connection: disconnected
[173944.095630] cdc_ncm 2-4:2.0 usb0: network connection: disconnected
[173944.127628] cdc_ncm 2-4:2.0 usb0: network connection: disconnected
[173944.159630] cdc_ncm 2-4:2.0 usb0: network connection: disconnected
[173944.191629] cdc_ncm 2-4:2.0 usb0: network connection: disconnected
[173944.223631] cdc_ncm 2-4:2.0 usb0: network connection: disconnected
[173944.255631] cdc_ncm 2-4:2.0 usb0: network connection: disconnected
[173944.287630] cdc_ncm 2-4:2.0 usb0: network connection: disconnected
[173944.319630] cdc_ncm 2-4:2.0 usb0: network connection: disconnected
[173944.351627] cdc_ncm 2-4:2.0 usb0: network connection: disconnected
[173944.383633] cdc_ncm 2-4:2.0 usb0: network connection: disconnected
[173944.415627] cdc_ncm 2-4:2.0 usb0: network connection: disconnected
[173944.447627] cdc_ncm 2-4:2.0 usb0: network connection: disconnected
[173944.479631] cdc_ncm 2-4:2.0 usb0: network connection: disconnected
[173944.511631] cdc_ncm 2-4:2.0 usb0: network connection: disconnected
[173944.543630] cdc_ncm 2-4:2.0 usb0: network connection: disconnected
[173944.575629] cdc_ncm 2-4:2.0 usb0: network connection: disconnected
[173944.607628] cdc_ncm 2-4:2.0 usb0: network connection: disconnected
[173944.639628] cdc_ncm 2-4:2.0 usb0: network connection: disconnected
[173944.671630] cdc_ncm 2-4:2.0 usb0: network connection: disconnected
[173944.703629] cdc_ncm 2-4:2.0 usb0: network connection: disconnected
[173944.735631] cdc_ncm 2-4:2.0 usb0: network connection: disconnected
[173944.767631] cdc_ncm 2-4:2.0 usb0: network connection: disconnected
[173944.799622] cdc_ncm 2-4:2.0 usb0: network connection: disconnected
[173944.831629] cdc_ncm 2-4:2.0 usb0: network connection: disconnected
[173944.863630] cdc_ncm 2-4:2.0 usb0: network connection: disconnected
[173944.895634] cdc_ncm 2-4:2.0 usb0: network connection: disconnected
[173944.927631] cdc_ncm 2-4:2.0 usb0: network connection: disconnected
[173944.959633] cdc_ncm 2-4:2.0 usb0: network connection: disconnected
[173944.991628] cdc_ncm 2-4:2.0 usb0: network connection: disconnected
It's just as bad when the link is up:
[174451.007591] cdc_ncm 2-4:2.0 usb0: 2500 mbit/s downlink 2500 mbit/s
uplink
[174451.039592] cdc_ncm 2-4:2.0 usb0: network connection: connected
[174451.071637] cdc_ncm 2-4:2.0 usb0: 2500 mbit/s downlink 2500 mbit/s
uplink
[174451.103630] cdc_ncm 2-4:2.0 usb0: network connection: connected
[174451.135630] cdc_ncm 2-4:2.0 usb0: 2500 mbit/s downlink 2500 mbit/s
uplink
[174451.167630] cdc_ncm 2-4:2.0 usb0: network connection: connected
[174451.199631] cdc_ncm 2-4:2.0 usb0: 2500 mbit/s downlink 2500 mbit/s
uplink
[174451.231622] cdc_ncm 2-4:2.0 usb0: network connection: connected
[174451.263634] cdc_ncm 2-4:2.0 usb0: 2500 mbit/s downlink 2500 mbit/s
uplink
[174451.295631] cdc_ncm 2-4:2.0 usb0: network connection: connected
[174451.327629] cdc_ncm 2-4:2.0 usb0: 2500 mbit/s downlink 2500 mbit/s
uplink
[174451.359628] cdc_ncm 2-4:2.0 usb0: network connection: connected
[174451.391631] cdc_ncm 2-4:2.0 usb0: 2500 mbit/s downlink 2500 mbit/s
uplink
[174451.423629] cdc_ncm 2-4:2.0 usb0: network connection: connected
[174451.455631] cdc_ncm 2-4:2.0 usb0: 2500 mbit/s downlink 2500 mbit/s
uplink
[174451.487630] cdc_ncm 2-4:2.0 usb0: network connection: connected
[174451.519632] cdc_ncm 2-4:2.0 usb0: 2500 mbit/s downlink 2500 mbit/s
uplink
[174451.551629] cdc_ncm 2-4:2.0 usb0: network connection: connected
[174451.583629] cdc_ncm 2-4:2.0 usb0: 2500 mbit/s downlink 2500 mbit/s
uplink
[174451.615634] cdc_ncm 2-4:2.0 usb0: network connection: connected
[174451.647631] cdc_ncm 2-4:2.0 usb0: 2500 mbit/s downlink 2500 mbit/s
uplink
[174451.679628] cdc_ncm 2-4:2.0 usb0: network connection: connected
[174451.711632] cdc_ncm 2-4:2.0 usb0: 2500 mbit/s downlink 2500 mbit/s
uplink
[174451.743631] cdc_ncm 2-4:2.0 usb0: network connection: connected
[174451.775630] cdc_ncm 2-4:2.0 usb0: 2500 mbit/s downlink 2500 mbit/s
uplink
[174451.807627] cdc_ncm 2-4:2.0 usb0: network connection: connected
[174451.839630] cdc_ncm 2-4:2.0 usb0: 2500 mbit/s downlink 2500 mbit/s
uplink
[174451.871628] cdc_ncm 2-4:2.0 usb0: network connection: connected
[174451.903631] cdc_ncm 2-4:2.0 usb0: 2500 mbit/s downlink 2500 mbit/s
uplink
[174451.935628] cdc_ncm 2-4:2.0 usb0: network connection: connected
[174451.967629] cdc_ncm 2-4:2.0 usb0: 2500 mbit/s downlink 2500 mbit/s
uplink
[174451.999633] cdc_ncm 2-4:2.0 usb0: network connection: connected
This is what the lsusb -v output looks like for the device:
Bus 002 Device 002: ID 0bda:8156 Realtek Semiconductor Corp.
Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 3.20
bDeviceClass 0 (Defined at Interface level)
bDeviceSubClass 0
bDeviceProtocol 0
bMaxPacketSize0 9
idVendor 0x0bda Realtek Semiconductor Corp.
idProduct 0x8156
bcdDevice 30.00
iManufacturer 1 Realtek
iProduct 2 USB 10/100/1G/2.5G LAN
iSerial 6 000000001
bNumConfigurations 3
Configuration Descriptor:
bLength 9
bDescriptorType 2
wTotalLength 57
bNumInterfaces 1
bConfigurationValue 1
iConfiguration 0
bmAttributes 0xa0
(Bus Powered)
Remote Wakeup
MaxPower 128mA
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 0
bNumEndpoints 3
bInterfaceClass 255 Vendor Specific Class
bInterfaceSubClass 255 Vendor Specific Subclass
bInterfaceProtocol 0
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 0x0400 1x 1024 bytes
bInterval 0
bMaxBurst 4
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x02 EP 2 OUT
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0400 1x 1024 bytes
bInterval 0
bMaxBurst 4
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x83 EP 3 IN
bmAttributes 3
Transfer Type Interrupt
Synch Type None
Usage Type Data
wMaxPacketSize 0x0002 1x 2 bytes
bInterval 11
bMaxBurst 1
Configuration Descriptor:
bLength 9
bDescriptorType 2
wTotalLength 104
bNumInterfaces 2
bConfigurationValue 2
iConfiguration 0
bmAttributes 0xa0
(Bus Powered)
Remote Wakeup
MaxPower 128mA
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 0
bNumEndpoints 1
bInterfaceClass 2 Communications
bInterfaceSubClass 13
bInterfaceProtocol 0
iInterface 5 CDC Communications Control
CDC Header:
bcdCDC 1.10
CDC Union:
bMasterInterface 0
bSlaveInterface 1
CDC Ethernet:
iMacAddress 3 8CAE4CDD0417
bmEthernetStatistics 0x0031500f
wMaxSegmentSize 1518
wNumberMCFilters 0x8000
bNumberPowerFilters 0
UNRECOGNIZED CDC: 06 24 1a 00 01 2b
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 8
bMaxBurst 1
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 1
bAlternateSetting 0
bNumEndpoints 0
bInterfaceClass 10 CDC Data
bInterfaceSubClass 0 Unused
bInterfaceProtocol 1
iInterface 0
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 1
bAlternateSetting 1
bNumEndpoints 2
bInterfaceClass 10 CDC Data
bInterfaceSubClass 0 Unused
bInterfaceProtocol 1
iInterface 4 Ethernet Data
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x81 EP 1 IN
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0400 1x 1024 bytes
bInterval 0
bMaxBurst 4
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x02 EP 2 OUT
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0400 1x 1024 bytes
bInterval 0
bMaxBurst 4
Configuration Descriptor:
bLength 9
bDescriptorType 2
wTotalLength 98
bNumInterfaces 2
bConfigurationValue 3
iConfiguration 0
bmAttributes 0xa0
(Bus Powered)
Remote Wakeup
MaxPower 128mA
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 0
bNumEndpoints 1
bInterfaceClass 2 Communications
bInterfaceSubClass 6 Ethernet Networking
bInterfaceProtocol 0
iInterface 5 CDC Communications Control
CDC Header:
bcdCDC 1.10
CDC Union:
bMasterInterface 0
bSlaveInterface 1
CDC Ethernet:
iMacAddress 3 8CAE4CDD0417
bmEthernetStatistics 0x0031500f
wMaxSegmentSize 1518
wNumberMCFilters 0x8000
bNumberPowerFilters 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 8
bMaxBurst 1
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 1
bAlternateSetting 0
bNumEndpoints 0
bInterfaceClass 10 CDC Data
bInterfaceSubClass 0 Unused
bInterfaceProtocol 0
iInterface 0
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 1
bAlternateSetting 1
bNumEndpoints 2
bInterfaceClass 10 CDC Data
bInterfaceSubClass 0 Unused
bInterfaceProtocol 0
iInterface 4 Ethernet Data
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x81 EP 1 IN
bmAttributes 2
Transfer Type Bulk
bEndpointAddress 0x81 EP 1 IN
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0400 1x 1024 bytes
bInterval 0
bMaxBurst 4
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x02 EP 2 OUT
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0400 1x 1024 bytes
bInterval 0
bMaxBurst 4
Device Status: 0x001c
(Bus Powered)
Test Mode
If I do this, then it switches from 'usb0' to 'eth1':
/sys/devices/pci0000:00/0000:00:15.0/usb2/2-4 # echo 3 > bConfigurationValue
Regardless of whether I try to use it as eth1 or usb0, it does not
communicate. I have turned off USB autosuspend for the device, but with
no change:
/sys/devices/pci0000:00/0000:00:15.0/usb2/2-4 # cat power/control
on
At this point, I don't know what else to try. My understanding is that
cdc_ncm supports this device and the Realtek-provided driver shouldn't
be needed anymore. The r8152 driver already in the kernel doesn't pick
up this device.
Any help would be greatly appreciated.
- Jody Bruchon
reply other threads:[~2020-08-27 16:51 UTC|newest]
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