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gregkh
Implement Precision Time Measurement (PTM) Capability Descriptor of USB 3.2
This line is triggered.
https://github.com/gregkh/usbutils/blob/9034a5ffd0d1d65de245923080d2db6d7d4c5337/lsusb.c#L3671
Here is a report from public Internet https://www.reddit.com/r/linux4noobs/s/ATAGegGsx4
The same happens here, i.e. I have realtek hub on the motherboard itself, MSI Carbon Z890 for Arrow Lake.
Then I have this very same ContainerID 20b9cde5-7039-e011-a935-0002a5d5c51b. And in the end some strange UNRECOGNIZED 3 bytes are printed.
Container ID Device Capability:
bLength 20
bDescriptorType 16
bDevCapabilityType 4
bReserved 0
ContainerID {20b9cde5-7039-e011-a935-0002a5d5c51b}
** UNRECOGNIZED: 03 10 0b
This is Precision Time Measurement (PTM) Capability Descriptor of USB 3.2: https://www.usb.org/bos-descriptor-types
Will also add additional data.
root@kali:~# uname -a
Linux kali 6.13-rt-amd64 #1 SMP PREEMPT_RT Debian 6.13.7-1~exp1 (2025-03-14) x86_64 GNU/Linux
root@kali:~# lsusb -d 0bda:0420 -vvv
Bus 006 Device 002: ID 0bda:0420 Realtek Semiconductor Corp. 4-Port USB 3.0 Hub
Negotiated speed: SuperSpeed+ (10Gbps)
Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 3.20
bDeviceClass 9 Hub
bDeviceSubClass 0 [unknown]
bDeviceProtocol 3
bMaxPacketSize0 9
idVendor 0x0bda Realtek Semiconductor Corp.
idProduct 0x0420 4-Port USB 3.0 Hub
bcdDevice 1.83
iManufacturer 1 Generic
iProduct 2 4-Port USB 3.0 Hub
iSerial 0
bNumConfigurations 1
Configuration Descriptor:
bLength 9
bDescriptorType 2
wTotalLength 0x001f
bNumInterfaces 1
bConfigurationValue 1
iConfiguration 4 USB3.0 Hub
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 [unknown]
bInterfaceProtocol 0 Full speed (or root) hub
iInterface 5 Interrupt In Interface
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x81 EP 1 IN
bmAttributes 19
Transfer Type Interrupt
Synch Type None
Usage Type Feedback
wMaxPacketSize 0x0002 1x 2 bytes
bInterval 8
bMaxBurst 0
Binary Object Store Descriptor:
bLength 5
bDescriptorType 15
wTotalLength 0x0049
bNumDeviceCaps 5
USB 2.0 Extension Device Capability:
bLength 7
bDescriptorType 16
bDevCapabilityType 2
bmAttributes 0x0000f41e
BESL Link Power Management (LPM) Supported
BESL value 1024 us
Deep BESL value 61440 us
SuperSpeed USB Device Capability:
bLength 10
bDescriptorType 16
bDevCapabilityType 3
bmAttributes 0x00
wSpeedsSupported 0x000e
Device can operate at Full Speed (12Mbps)
Device can operate at High Speed (480Mbps)
Device can operate at SuperSpeed (5Gbps)
bFunctionalitySupport 1
Lowest fully-functional device speed is Full Speed (12Mbps)
bU1DevExitLat 10 micro seconds
bU2DevExitLat 1023 micro seconds
SuperSpeedPlus USB Device Capability:
bLength 28
bDescriptorType 16
bDevCapabilityType 10
bmAttributes 0x00000023
Sublink Speed Attribute count 4
Sublink Speed ID count 2
wFunctionalitySupport 0x1100
Min functional Speed Attribute ID: 0
Min functional RX lanes: 1
Min functional TX lanes: 1
bmSublinkSpeedAttr[0] 0x00050030
Speed Attribute ID: 0 5Gb/s Symmetric RX SuperSpeed
bmSublinkSpeedAttr[1] 0x000500b0
Speed Attribute ID: 0 5Gb/s Symmetric TX SuperSpeed
bmSublinkSpeedAttr[2] 0x000a4031
Speed Attribute ID: 1 10Gb/s Symmetric RX SuperSpeedPlus
bmSublinkSpeedAttr[3] 0x000a40b1
Speed Attribute ID: 1 10Gb/s Symmetric TX SuperSpeedPlus
Container ID Device Capability:
bLength 20
bDescriptorType 16
bDevCapabilityType 4
bReserved 0
ContainerID {20b9cde5-7039-e011-a935-0002a5d5c51b}
** UNRECOGNIZED: 03 10 0b
Hub Descriptor:
bLength 12
bDescriptorType 42
nNbrPorts 4
wHubCharacteristic 0x0009
Per-port power switching
Per-port overcurrent protection
bPwrOn2PwrGood 0 * 2 milli seconds
bHubContrCurrent 8 milli Ampere
bHubDecLat 0.2 micro seconds
wHubDelay 2290 nano seconds
DeviceRemovable 0x00
Hub Port Status:
Port 1: 0000.02a0 5Gbps power Rx.Detect
Port 2: 0000.02a0 5Gbps power Rx.Detect
Port 3: 0000.02a0 5Gbps power Rx.Detect
Port 4: 0000.02a0 5Gbps power Rx.Detect
can't get debug descriptor: Resource temporarily unavailable
Device Status: 0x000d
Self Powered
U1 Enabled
U2 Enabled
Bus 006 Device 003: ID 0bda:0420 Realtek Semiconductor Corp. 4-Port USB 3.0 Hub
Negotiated speed: SuperSpeed+ (10Gbps)
Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 3.20
bDeviceClass 9 Hub
bDeviceSubClass 0 [unknown]
bDeviceProtocol 3
bMaxPacketSize0 9
idVendor 0x0bda Realtek Semiconductor Corp.
idProduct 0x0420 4-Port USB 3.0 Hub
bcdDevice 3.36
iManufacturer 1 Generic
iProduct 2 4-Port USB 3.0 Hub
iSerial 0
bNumConfigurations 1
Configuration Descriptor:
bLength 9
bDescriptorType 2
wTotalLength 0x001f
bNumInterfaces 1
bConfigurationValue 1
iConfiguration 4 USB3.0 Hub
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 [unknown]
bInterfaceProtocol 0 Full speed (or root) hub
iInterface 5 Interrupt In Interface
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x81 EP 1 IN
bmAttributes 19
Transfer Type Interrupt
Synch Type None
Usage Type Feedback
wMaxPacketSize 0x0002 1x 2 bytes
bInterval 8
bMaxBurst 0
Binary Object Store Descriptor:
bLength 5
bDescriptorType 15
wTotalLength 0x0049
bNumDeviceCaps 5
USB 2.0 Extension Device Capability:
bLength 7
bDescriptorType 16
bDevCapabilityType 2
bmAttributes 0x0000f41e
BESL Link Power Management (LPM) Supported
BESL value 1024 us
Deep BESL value 61440 us
SuperSpeed USB Device Capability:
bLength 10
bDescriptorType 16
bDevCapabilityType 3
bmAttributes 0x00
wSpeedsSupported 0x000e
Device can operate at Full Speed (12Mbps)
Device can operate at High Speed (480Mbps)
Device can operate at SuperSpeed (5Gbps)
bFunctionalitySupport 1
Lowest fully-functional device speed is Full Speed (12Mbps)
bU1DevExitLat 10 micro seconds
bU2DevExitLat 1023 micro seconds
SuperSpeedPlus USB Device Capability:
bLength 28
bDescriptorType 16
bDevCapabilityType 10
bmAttributes 0x00000023
Sublink Speed Attribute count 4
Sublink Speed ID count 2
wFunctionalitySupport 0x1100
Min functional Speed Attribute ID: 0
Min functional RX lanes: 1
Min functional TX lanes: 1
bmSublinkSpeedAttr[0] 0x00050030
Speed Attribute ID: 0 5Gb/s Symmetric RX SuperSpeed
bmSublinkSpeedAttr[1] 0x000500b0
Speed Attribute ID: 0 5Gb/s Symmetric TX SuperSpeed
bmSublinkSpeedAttr[2] 0x000a4031
Speed Attribute ID: 1 10Gb/s Symmetric RX SuperSpeedPlus
bmSublinkSpeedAttr[3] 0x000a40b1
Speed Attribute ID: 1 10Gb/s Symmetric TX SuperSpeedPlus
Container ID Device Capability:
bLength 20
bDescriptorType 16
bDevCapabilityType 4
bReserved 0
ContainerID {20b9cde5-7039-e011-a935-0002a5d5c51b}
** UNRECOGNIZED: 03 10 0b
Hub Descriptor:
bLength 12
bDescriptorType 42
nNbrPorts 4
wHubCharacteristic 0x0009
Per-port power switching
Per-port overcurrent protection
bPwrOn2PwrGood 250 * 2 milli seconds
bHubContrCurrent 8 milli Ampere
bHubDecLat 0.2 micro seconds
wHubDelay 2290 nano seconds
DeviceRemovable 0x00
Hub Port Status:
Port 1: 0000.02a0 5Gbps power Rx.Detect
Port 2: 0000.02a0 5Gbps power Rx.Detect
Port 3: 0000.02a0 5Gbps power Rx.Detect
Port 4: 0000.02a0 5Gbps power Rx.Detect
can't get debug descriptor: Resource temporarily unavailable
Device Status: 0x000d
Self Powered
U1 Enabled
U2 Enabled
