[RF loopback failed] Alright, so i broke it already

so… The lime quicktests kept failing, and I flashed the device again. something happened in while flashing the device, and well… looks like I’m going to be downloading the cypress sdk for ubuntu. Thought I’d create a thread to document my failure.
Connected to [WestBridge [USB 2.0] 4BE]
TransferPacket: Write failed (ret=-9)
TransferPacket: Write failed (ret=-9)
TransferPacket: Write failed (ret=-9)
Update not supported: UNKNOWN[HW=0]

Programming update failed!

This is where I am at currently.
I’ve downloaded FX3_SDK_1.3.4_Linux.tar.gz and CyUSB3_USB_Suite_Source.zip. I noticed however that the only instructions on the wiki are for windows, which isnt a thing that is done around these parts.

Before I go hacking around looking for gold does anyone want to point me toward the pinata?

So, using the images from github, and limesuite, it would appear that the device is functional again. At least it looks like a device again.

Anyway, It may be helpful if someone edited the wiki to create a step by step for recovery from this.

which would be download the images, start limesuite flash them, reset the device, the sdk and cypress do not need to be involved.

nick@ipad:~/Downloads$ LimeQuickTest
[ TESTING STARTED ]
->Start time: Wed Jul 22 20:00:05 2020

->Device: LimeSDR-USB, media=USB 3.0, module=FX3, addr=1d50:6108, serial=00090726074E3527
Serial Number: 00090726074E3527

[ Clock Network Test ]
->FX3 GPIF clock test
Test results: 38267; 42023; 45779 - PASSED
->Si5351C test
CLK0: 17554 / 17554 - PASSED
CLK1: 17554 / 17554 - PASSED
CLK2: 17554 / 17554 - PASSED
CLK3: 17554 / 17554 - PASSED
CLK4: 17554 / 17554 - PASSED
CLK5: 17554 / 17554 - PASSED
CLK6: 17554 / 17554 - PASSED
->ADF4002 Test
Result: 10 - PASSED
->VCTCXO test
Results : 5112937 (min); 5113073 (max) - PASSED
->Clock Network Test PASSED

[ FPGA EEPROM Test ]
->Read EEPROM
->Read data: 12 07 1A 12 07 1A 02
->FPGA EEPROM Test PASSED

[ LMS7002M Test ]
->Perform Registers Test
->External Reset line test
Reg 0x20: Write value 0xFFFD, Read value 0xFFFD
Reg 0x20: value after reset 0x0FFFF
->LMS7002M Test PASSED

[ RF Loopback Test ]
Note: The test should be run without anything connected to RF ports
->Configure LMS
TransferPacket: Read failed (ret=0)
SetPllFrequency: configure FPGA PLL, failed to write registers
->Run Tests (TX_2-> LNA_L):
SetFrequencySXT(805 MHz) - cannot deliver frequency
->Run Tests (TX_1 -> LNA_W):
SetFrequencySXT(1805 MHz) - cannot deliver frequency
->Run Tests (TX_2-> LNA_H):
SetFrequencySXT(2505 MHz) - cannot deliver frequency
->RF Loopback Test FAILED

=> Board tests FAILED <=

Elapsed time: 2.00 seconds

Is this a power deficiency?

nick@ipad:~/Downloads$ LimeQuickTest
[ TESTING STARTED ]
->Start time: Wed Jul 22 20:28:50 2020

->Device: LimeSDR-USB, media=USB 2.0, module=FX3, addr=1d50:6108, serial=00090726074E3527
Warning: USB3 not available
Serial Number: 00090726074E3527

[ Clock Network Test ]
->FX3 GPIF clock test
Test results: 61988; 208; 3964 - PASSED
->Si5351C test
CLK0: 17554 / 17554 - PASSED
CLK1: 17554 / 17554 - PASSED
CLK2: 17554 / 17554 - PASSED
CLK3: 17554 / 17554 - PASSED
CLK4: 17554 / 17554 - PASSED
CLK5: 17554 / 17554 - PASSED
CLK6: 17554 / 17554 - PASSED
->ADF4002 Test
Result: 10 - PASSED
->VCTCXO test
Results : 5112931 (min); 5113066 (max) - PASSED
->Clock Network Test PASSED

[ FPGA EEPROM Test ]
->Read EEPROM
->Read data: 12 07 1A 12 07 1A 02
->FPGA EEPROM Test PASSED

[ LMS7002M Test ]
->Perform Registers Test
->External Reset line test
Reg 0x20: Write value 0xFFFD, Read value 0xFFFD
Reg 0x20: value after reset 0x0FFFF
->LMS7002M Test PASSED

[ RF Loopback Test ]
Note: The test should be run without anything connected to RF ports
->Configure LMS
TransferPacket: Read failed (ret=0)
->Run Tests (TX_2-> LNA_L):
Failed to read samples: Timeout
CH0 (SXR=800.0MHz, SXT=805.0MHz): Result:(-15.0 dBFS, 5.00 MHz) - FAILED
Failed to read samples: Timeout
CH1 (SXR=800.0MHz, SXT=805.0MHz): Result:(-15.0 dBFS, 5.00 MHz) - FAILED
->Run Tests (TX_1 -> LNA_W):
Failed to read samples: Timeout
CH0 (SXR=1800.0MHz, SXT=1805.0MHz): Result:(-15.0 dBFS, 5.00 MHz) - FAILED
Failed to read samples: Timeout
CH1 (SXR=1800.0MHz, SXT=1805.0MHz): Result:(-15.0 dBFS, 5.00 MHz) - FAILED
->Run Tests (TX_2-> LNA_H):
Failed to read samples: Timeout
CH0 (SXR=2500.0MHz, SXT=2505.0MHz): Result:(-15.0 dBFS, 5.00 MHz) - FAILED
Failed to read samples: Timeout
CH1 (SXR=2500.0MHz, SXT=2505.0MHz): Result:(-15.0 dBFS, 5.00 MHz) - FAILED
->RF Loopback Test FAILED

=> Board tests FAILED <=

Elapsed time: 8.96 seconds

With less stuff connected to the usb system, the fail grows more complex. I’m thinking power.

Please use a USB 3.0 port. A USB 2.0 port will not supply sufficient power.

the first test did not have a usb2 flag. the second one did.
heres another one that is connected directly to the host.

nick@ipad:~/Downloads$ LimeQuickTest
[ TESTING STARTED ]
->Start time: Thu Jul 23 08:42:54 2020

->Device: LimeSDR-USB, media=USB 3.0, module=FX3, addr=1d50:6108, serial=00090726074E3527
Serial Number: 00090726074E3527

[ Clock Network Test ]
->FX3 GPIF clock test
Test results: 39314; 43070; 46826 - PASSED
->Si5351C test
CLK0: 17554 / 17554 - PASSED
CLK1: 17554 / 17554 - PASSED
CLK2: 17554 / 17554 - PASSED
CLK3: 17554 / 17554 - PASSED
CLK4: 17554 / 17554 - PASSED
CLK5: 17554 / 17554 - PASSED
CLK6: 17554 / 17554 - PASSED
->ADF4002 Test
Result: 10 - PASSED
->VCTCXO test
Results : 5112925 (min); 5113059 (max) - PASSED
->Clock Network Test PASSED

[ FPGA EEPROM Test ]
->Read EEPROM
->Read data: 12 07 1A 12 07 1A 02
->FPGA EEPROM Test PASSED

[ LMS7002M Test ]
->Perform Registers Test
->External Reset line test
Reg 0x20: Write value 0xFFFD, Read value 0xFFFD
Reg 0x20: value after reset 0x0FFFF
->LMS7002M Test PASSED

[ RF Loopback Test ]
Note: The test should be run without anything connected to RF ports
->Configure LMS
->Run Tests (TX_2-> LNA_L):
CH0 (SXR=800.0MHz, SXT=805.0MHz): Result:(-13.5 dBFS, 5.00 MHz) - PASSED
CH1 (SXR=800.0MHz, SXT=805.0MHz): Result:(-16.2 dBFS, 5.00 MHz) - PASSED
->Run Tests (TX_1 -> LNA_W):
TransferPacket: Read failed (ret=0)
Failed to read samples: Timeout
CH0 (SXR=1800.0MHz, SXT=1805.0MHz): Result:(-15.0 dBFS, 5.00 MHz) - FAILED
libusb: error [udev_hotplug_event] ignoring udev action bind
libusb: error [udev_hotplug_event] ignoring udev action bind
Failed to read samples: Timeout
CH1 (SXR=1800.0MHz, SXT=1805.0MHz): Result:(-15.0 dBFS, 5.00 MHz) - FAILED
->Run Tests (TX_2-> LNA_H):
Failed to read samples: Timeout
CH0 (SXR=2500.0MHz, SXT=2505.0MHz): Result:(-15.0 dBFS, 5.00 MHz) - FAILED
Failed to read samples: Timeout
CH1 (SXR=2500.0MHz, SXT=2505.0MHz): Result:(-15.0 dBFS, 5.00 MHz) - FAILED
->RF Loopback Test FAILED

=> Board tests FAILED <=

Elapsed time: 5.88 seconds

this stands out to me:

TransferPacket: Read failed (ret=0)

what can cause this?

Could be power brownout. Is the board plugged directly into the USB 3.0 port, without any cable in between? It should be possible to use a cable, but sometimes this have been seen to cause problems if lower quality or damaged etc. and resulting in voltage drop.

so heres the “power” lines from lsusb -v

cat usb | grep -ni power
26: (Bus Powered)
27: MaxPower 100mA
92: Link Power Management (LPM) Supported
107: (Bus Powered)
133: Self Powered
135: MaxPower 0mA
162: No power switching (usb 1.0)
170: Port 1: 0000.02a0 5Gbps power Rx.Detect
171: Port 2: 0000.0203 5Gbps power U0 enable connect
172: Port 3: 0000.02a0 5Gbps power Rx.Detect
173: Port 4: 0000.02a0 5Gbps power Rx.Detect
174: Port 5: 0000.02a0 5Gbps power Rx.Detect
175: Port 6: 0000.02a0 5Gbps power Rx.Detect
194: Self Powered
220: Self Powered
222: MaxPower 100mA
444: Self Powered
470: (Bus Powered)
471: MaxPower 500mA
531: Power Line Frequency
1066: (Bus Powered)
1092: Self Powered
1094: MaxPower 0mA
1120: No power switching (usb 1.0)
1128: Port 1: 0000.0100 power
1129: Port 2: 0000.0100 power
1130: Port 3: 0000.0100 power
1131: Port 4: 0000.0503 highspeed power enable connect
1132: Port 5: 0000.0103 power enable connect
1133: Port 6: 0000.0100 power
1134: Port 7: 0000.0100 power
1136: Self Powered


https://pastebin.com/9vW2EPx5

I’m guessing this means that my laptop simply doesnt drive enough power to usb for this to work period.

1
2 Bus 002 Device 023: ID 1d50:6108 OpenMoko, Inc.
3 Device Descriptor:
4 bLength 18
5 bDescriptorType 1
6 bcdUSB 3.00
7 bDeviceClass 0 (Defined at Interface level)
8 bDeviceSubClass 0
9 bDeviceProtocol 0
10 bMaxPacketSize0 9
11 idVendor 0x1d50 OpenMoko, Inc.
12 idProduct 0x6108
13 bcdDevice 0.00
14 iManufacturer 1 Myriad-RF
15 iProduct 2 LimeSDR-USB
16 iSerial 3 00090726074E3527
17 bNumConfigurations 1
18 Configuration Descriptor:
19 bLength 9
20 bDescriptorType 2
21 wTotalLength 70
22 bNumInterfaces 1
23 bConfigurationValue 1
24 iConfiguration 0
25 bmAttributes 0x80
26 (Bus Powered)
27 MaxPower 100mA
28 Interface Descriptor:
29 bLength 9
30 bDescriptorType 4
31 bInterfaceNumber 0
32 bAlternateSetting 0
33 bNumEndpoints 4
34 bInterfaceClass 255 Vendor Specific Class
35 bInterfaceSubClass 0
36 bInterfaceProtocol 0
37 iInterface 0
38 Endpoint Descriptor:
39 bLength 7
40 bDescriptorType 5
41 bEndpointAddress 0x01 EP 1 OUT
42 bmAttributes 2
43 Transfer Type Bulk
44 Synch Type None
45 Usage Type Data
46 wMaxPacketSize 0x0400 1x 1024 bytes
47 bInterval 0
48 bMaxBurst 15
49 Endpoint Descriptor:
50 bLength 7
51 bDescriptorType 5
52 bEndpointAddress 0x81 EP 1 IN
53 bmAttributes 2
54 Transfer Type Bulk
55 Synch Type None
56 Usage Type Data
57 wMaxPacketSize 0x0400 1x 1024 bytes
58 bInterval 0
59 bMaxBurst 15
60 Endpoint Descriptor:
61 bLength 7
62 bDescriptorType 5
63 bEndpointAddress 0x0f EP 15 OUT
64 bmAttributes 2
65 Transfer Type Bulk
66 Synch Type None
67 Usage Type Data
68 wMaxPacketSize 0x0400 1x 1024 bytes
69 bInterval 0
70 bMaxBurst 0
71 Endpoint Descriptor:
72 bLength 7
73 bDescriptorType 5
74 bEndpointAddress 0x8f EP 15 IN
75 bmAttributes 2
76 Transfer Type Bulk
77 Synch Type None
78 Usage Type Data
79 wMaxPacketSize 0x0400 1x 1024 bytes
80 bInterval 0
81 bMaxBurst 0
82 Binary Object Store Descriptor:
83 bLength 5
84 bDescriptorType 15
85 wTotalLength 22
86 bNumDeviceCaps 2
87 USB 2.0 Extension Device Capability:
88 bLength 7
89 bDescriptorType 16
90 bDevCapabilityType 2
91 bmAttributes 0x00000002
92 Link Power Management (LPM) Supported
93 SuperSpeed USB Device Capability:
94 bLength 10
95 bDescriptorType 16
96 bDevCapabilityType 3
97 bmAttributes 0x00
98 wSpeedsSupported 0x000e
99 Device can operate at Full Speed (12Mbps)
100 Device can operate at High Speed (480Mbps)
101 Device can operate at SuperSpeed (5Gbps)
102 bFunctionalitySupport 3
103 Lowest fully-functional device speed is SuperSpeed (5Gbps)
104 bU1DevExitLat 0 micro seconds
105 bU2DevExitLat 0 micro seconds
106 Device Status: 0x0000
107 (Bus Powered)
108
109 Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
110 Device Descriptor:
111 bLength 18
112 bDescriptorType 1
113 bcdUSB 3.00
114 bDeviceClass 9 Hub
115 bDeviceSubClass 0 Unused
116 bDeviceProtocol 3
117 bMaxPacketSize0 9
118 idVendor 0x1d6b Linux Foundation
119 idProduct 0x0003 3.0 root hub
120 bcdDevice 4.16
121 iManufacturer 3 Linux 4.16.18-galliumos xhci-hcd
122 iProduct 2 xHCI Host Controller
123 iSerial 1 0000:00:14.0
124 bNumConfigurations 1
125 Configuration Descriptor:
126 bLength 9
127 bDescriptorType 2
128 wTotalLength 31
129 bNumInterfaces 1
130 bConfigurationValue 1
131 iConfiguration 0
132 bmAttributes 0xe0
133 Self Powered
134 Remote Wakeup
135 MaxPower 0mA
136 Interface Descriptor:
137 bLength 9
138 bDescriptorType 4
139 bInterfaceNumber 0
140 bAlternateSetting 0
141 bNumEndpoints 1
142 bInterfaceClass 9 Hub
143 bInterfaceSubClass 0 Unused
144 bInterfaceProtocol 0 Full speed (or root) hub
145 iInterface 0
146 Endpoint Descriptor:
147 bLength 7
148 bDescriptorType 5
149 bEndpointAddress 0x81 EP 1 IN
150 bmAttributes 3
151 Transfer Type Interrupt
152 Synch Type None
153 Usage Type Data
154 wMaxPacketSize 0x0004 1x 4 bytes
155 bInterval 12
156 bMaxBurst 0
157 Hub Descriptor:
158 bLength 12
159 bDescriptorType 42
160 nNbrPorts 6
161 wHubCharacteristic 0x000a
162 No power switching (usb 1.0)
163 Per-port overcurrent protection
164 bPwrOn2PwrGood 10 * 2 milli seconds
165 bHubContrCurrent 0 milli Ampere
166 bHubDecLat 0.0 micro seconds
167 wHubDelay 0 nano seconds
168 DeviceRemovable 0x00
169 Hub Port Status:
170 Port 1: 0000.02a0 5Gbps power Rx.Detect
171 Port 2: 0000.0203 5Gbps power U0 enable connect
172 Port 3: 0000.02a0 5Gbps power Rx.Detect
173 Port 4: 0000.02a0 5Gbps power Rx.Detect
174 Port 5: 0000.02a0 5Gbps power Rx.Detect
175 Port 6: 0000.02a0 5Gbps power Rx.Detect
176 Binary Object Store Descriptor:
177 bLength 5
178 bDescriptorType 15
179 wTotalLength 15
180 bNumDeviceCaps 1
181 SuperSpeed USB Device Capability:
182 bLength 10
183 bDescriptorType 16
184 bDevCapabilityType 3
185 bmAttributes 0x02
186 Latency Tolerance Messages (LTM) Supported
187 wSpeedsSupported 0x0008
188 Device can operate at SuperSpeed (5Gbps)
189 bFunctionalitySupport 3
190 Lowest fully-functional device speed is SuperSpeed (5Gbps)
191 bU1DevExitLat 10 micro seconds
192 bU2DevExitLat 512 micro seconds
193 Device Status: 0x0001
194 Self Powered

is the sdr even attempting to increase it’s power?

I can’t see why not and this is handled by the Cypress FX3 controller. If the port is enumerating as USB 3.0 and Lime Suite can run tests, albeit with issues and it appears that insufficient current is being supplied, I’d suspect the host port and try other computers if possible. It has been known for certain USB 3.0 chipsets to be problematic and this something not limited to LimeSDR USB, but also USB 3.0 devices also. If we can at least rule the port out this would be good.

Perhaps @zack may have some other suggestions.

I put this on hold for a little while but I did end up grabbing a different usb hub that has power attached to it.

One question, what is the maximum safe voltage that the board will accept? Can this be hooked up to a 10-16v auto circuit?

Snip--------------------------------------------------------------

nick@ipad:~$ LimeQuickTest 
[ TESTING STARTED ]
->Start time: Thu Jul 30 20:53:23 2020

->Device: LimeSDR-USB, media=USB 3.0, module=FX3, addr=1d50:6108, serial=00090726074E3527, HW=4, GW=2.23
  Serial Number: 00090726074E3527
Chip temperature: 27 C

[ Clock Network Test ]
->FX3 GPIF clock test
  Test results: 43986; 47742; 51498 - PASSED
->Si5351C test
  CLK0: 17554 / 17554 - PASSED
  CLK1: 17554 / 17554 - PASSED
  CLK2: 17554 / 17554 - PASSED
  CLK3: 17554 / 17554 - PASSED
  CLK4: 17554 / 17554 - PASSED
  CLK5: 17554 / 17554 - PASSED
  CLK6: 17554 / 17554 - PASSED
->ADF4002 Test
  Result: 10 - PASSED
->VCTCXO test
  Results : 5112929 (min); 5113063 (max) - PASSED
->Clock Network Test PASSED

[ FPGA EEPROM Test ]
->Read EEPROM
->Read data: 12 07 1A 12 07 1A 02
->FPGA EEPROM Test PASSED

[ LMS7002M Test ]
->Perform Registers Test
->External Reset line test
  Reg 0x20: Write value 0xFFFD, Read value 0xFFFD
  Reg 0x20: value after reset 0x0FFFF
->LMS7002M Test PASSED

[ RF Loopback Test ]
Note: The test should be run without anything connected to RF ports
->Configure LMS
->Run Tests (TX_2-> LNA_L):
  CH0 (SXR=800.0MHz, SXT=805.0MHz): Result:(-13.7 dBFS, 5.00 MHz) - PASSED
  CH1 (SXR=800.0MHz, SXT=805.0MHz): Result:(-16.4 dBFS, 5.00 MHz) - PASSED
->Run Tests (TX_1 -> LNA_W):
  CH0 (SXR=1800.0MHz, SXT=1805.0MHz): Result:(-18.5 dBFS, 5.00 MHz) - PASSED
  CH1 (SXR=1800.0MHz, SXT=1805.0MHz): Result:(-22.4 dBFS, 5.00 MHz) - FAILED
->Run Tests (TX_2-> LNA_H):
  CH0 (SXR=2500.0MHz, SXT=2505.0MHz): Result:(-17.5 dBFS, 5.00 MHz) - PASSED
  CH1 (SXR=2500.0MHz, SXT=2505.0MHz): Result:(-15.6 dBFS, 5.00 MHz) - PASSED
->RF Loopback Test FAILED

=> Board tests FAILED <=

Elapsed time: 1.66 seconds

SNIP---------------------------------------------------------------

nick@ipad:~$ sudo lsusb -t
[sudo] password for nick: 
/:  Bus 02.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/6p, 5000M
    |__ Port 2: Dev 2, If 0, Class=Hub, Driver=hub/4p, 5000M
        |__ Port 3: Dev 5, If 0, Class=Vendor Specific Class, Driver=, 5000M
        |__ Port 4: Dev 3, If 0, Class=Vendor Specific Class, Driver=r8152, 5000M
/:  Bus 01.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/7p, 480M
    |__ Port 2: Dev 12, If 0, Class=Hub, Driver=hub/5p, 480M
        |__ Port 1: Dev 13, If 0, Class=Hub, Driver=hub/4p, 480M
            |__ Port 3: Dev 15, If 0, Class=Mass Storage, Driver=usb-storage, 480M
    |__ Port 4: Dev 2, If 1, Class=Video, Driver=uvcvideo, 480M
    |__ Port 4: Dev 2, If 0, Class=Video, Driver=uvcvideo, 480M
    |__ Port 5: Dev 3, If 0, Class=Wireless, Driver=btusb, 12M
    |__ Port 5: Dev 3, If 1, Class=Wireless, Driver=btusb, 12M

SNIP----------------------------------------------------------------------`
nick@ipad:~$ sudo lsusb -v -s 5

Bus 002 Device 005: ID 1d50:6108 OpenMoko, Inc. 
Device Descriptor:
  bLength                18
  bDescriptorType         1
  bcdUSB               3.00
  bDeviceClass            0 (Defined at Interface level)
  bDeviceSubClass         0 
  bDeviceProtocol         0 
  bMaxPacketSize0         9
  idVendor           0x1d50 OpenMoko, Inc.
  idProduct          0x6108 
  bcdDevice            0.00
  iManufacturer           1 Myriad-RF
  iProduct                2 LimeSDR-USB
  iSerial                 3 00090726074E3527
  bNumConfigurations      1
  Configuration Descriptor:
    bLength                 9
    bDescriptorType         2
    wTotalLength           70
    bNumInterfaces          1
    bConfigurationValue     1
    iConfiguration          0 
    bmAttributes         0x80
      (Bus Powered)
    MaxPower              100mA
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        0
      bAlternateSetting       0
      bNumEndpoints           4
      bInterfaceClass       255 Vendor Specific Class
      bInterfaceSubClass      0 
      bInterfaceProtocol      0 
      iInterface              0 
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x01  EP 1 OUT
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0400  1x 1024 bytes
        bInterval               0
        bMaxBurst              15
      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              15
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x0f  EP 15 OUT
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0400  1x 1024 bytes
        bInterval               0
        bMaxBurst               0
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x8f  EP 15 IN
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0400  1x 1024 bytes
        bInterval               0
        bMaxBurst               0
Binary Object Store Descriptor:
  bLength                 5
  bDescriptorType        15
  wTotalLength           22
  bNumDeviceCaps          2
  USB 2.0 Extension Device Capability:
    bLength                 7
    bDescriptorType        16
    bDevCapabilityType      2
    bmAttributes   0x00000002
      Link Power Management (LPM) Supported
  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   3
      Lowest fully-functional device speed is SuperSpeed (5Gbps)
    bU1DevExitLat           0 micro seconds
    bU2DevExitLat           0 micro seconds
Device Status:     0x0000
  (Bus Powered)

SNAP-----------------------------------------------------------

[Jul30 19:10] usb 2-2.3: USB disconnect, device number 5
[ +2.556449] usb 2-2.3: new SuperSpeed USB device number 6 using xhci_hcd
[ +0.014316] usb 2-2.3: LPM exit latency is zeroed, disabling LPM.
[ +0.000840] usb 2-2.3: New USB device found, idVendor=1d50, idProduct=6108
[ +0.000005] usb 2-2.3: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[ +0.000003] usb 2-2.3: Product: LimeSDR-USB
[ +0.000003] usb 2-2.3: Manufacturer: Myriad-RF
[ +0.000003] usb 2-2.3: SerialNumber: 00090726074E3527

I notice this line:
[ +0.014316] usb 2-2.3: LPM exit latency is zeroed, disabling LPM.

is this saying it is disabling link power managment?

Check here please:
https://wiki.myriadrf.org/LimeSDR-USB_hardware_description#Power_distribution