[  293.679239] 
oom-kill:constraint=CONSTRAINT_NONE,nodemask=(null),cpuset=user.slice,mems_allowed=0,global_oom,task_memcg=/user.slice/user-1001.slice/session-6.scope,task=grep,pid=1652,uid=0
    [  293.679364] Out of memory: Killed process 1652 (grep) total-vm:200976kB, 
anon-rss:190472kB, file-rss:1392kB, shmem-rss:0kB, UID:0 pgtables:432kB 
oom_score_adj:0
[  293.757522] oom_reaper: reaped process 1652 (grep), now anon-rss:0kB, 
file-rss:0kB, shmem-rss:0kB
[ 2511.134234] dwc2 3f980000.usb: dwc2_hc_chhltd_intr_dma: Channel 3 - ChHltd 
set, but reason is unknown                                                      
                                    [ 2511.143743] dwc2 3f980000.usb: hcint 
0x00000002, intsts 0x04200009
[ 2514.165508] dwc2 3f980000.usb: dwc2_hc_chhltd_intr_dma: Channel 0 - ChHltd 
set, but reason is unknown                                                      
                                    [ 2514.175017] dwc2 3f980000.usb: hcint 
0x00000002, intsts 0x04200009
[ 2516.259813] usb 1-1.1: USB disconnect, device number 3
[ 2517.195230] dwc2 3f980000.usb: dwc2_hc_chhltd_intr_dma: Channel 1 - ChHltd 
set, but reason is unknown
[ 2517.204740] dwc2 3f980000.usb: hcint 0x00000002, intsts 0x04200009
[ 2517.211093] dwc2 3f980000.usb: dwc2_update_urb_state_abn(): trimming xfer 
length              [13008.762036] usb 1-1.3: new full-speed USB device number 
6 using dwc2
[13008.993174] usb 1-1.3: New USB device found, idVendor=248a, idProduct=8367, 
bcdDevice= 1.00
[13008.993210] usb 1-1.3: New USB device strings: Mfr=1, Product=2, 
SerialNumber=0               [13008.993225] usb 1-1.3: Product: Wireless 
Receiver
[13008.993238] usb 1-1.3: Manufacturer: Telink
[13009.003054] input: Telink Wireless Receiver Mouse as 
/devices/platform/soc/3f980000.usb/usb1/1-1/1-1.3/1-1.3:1.0/0003:248A:8367.0002/input/input0
[13009.003754] input: Telink Wireless Receiver Consumer Control as 
/devices/platform/soc/3f980000.usb/usb1/1-1/1-1.3/1-1.3:1.0/0003:248A:8367.0002/input/input1
[13009.062512] input: Telink Wireless Receiver System Control as 
/devices/platform/soc/3f980000.usb/usb1/1-1/1-1.3/1-1.3:1.0/0003:248A:8367.0002/input/input2
[13009.062933] hid-generic 0003:248A:8367.0002: input,hidraw0: USB HID v1.11 
Mouse [Telink Wireless Receiver] on usb-3f980000.usb-1.3/input0                 
                                     [13009.068796] input: Telink Wireless 
Receiver as 
/devices/platform/soc/3f980000.usb/usb1/1-1/1-1.3/1-1.3:1.1/0003:248A:8367.0003/input/input3
[13009.126575] hid-generic 0003:248A:8367.0003: input,hidraw1: USB HID v1.11 
Keyboard [Telink Wireless Receiver] on usb-3f980000.usb-1.3/input1
[13120.613428] usb 1-1.1: new high-speed USB device number 7 using dwc2
[13120.814956] usb 1-1.1: New USB device found, idVendor=0bda, idProduct=818b, 
bcdDevice= 2.00   [13120.814995] usb 1-1.1: New USB device strings: Mfr=1, 
Product=2, SerialNumber=3
[13120.815010] usb 1-1.1: Product: 802.11n NIC
[13120.815022] usb 1-1.1: Manufacturer: Realtek                                 
                 [13120.815034] usb 1-1.1: SerialNumber: 1CBFCE7421A6
[13121.315558] usb 1-1.1: USB disconnect, device number 7
[13129.061277] usb 1-1.1: new high-speed USB device number 8 using dwc2
[13129.262693] usb 1-1.1: New USB device found, idVendor=0e8d, idProduct=201c, 
bcdDevice= 2.23
[13129.262722] usb 1-1.1: New USB device strings: Mfr=1, Product=2, 
SerialNumber=3
[13129.262737] usb 1-1.1: Product: BV9900Pro
[13129.262749] usb 1-1.1: Manufacturer: Blackview
[13129.262761] usb 1-1.1: SerialNumber: 0123456789ABCDEF
[13148.707842] usb 1-1.1: USB disconnect, device number 8
[13149.289206] usb 1-1.1: new high-speed USB device number 9 using dwc2
[13149.490959] usb 1-1.1: New USB device found, idVendor=0e8d, idProduct=2005, 
bcdDevice= 2.23
[13149.490997] usb 1-1.1: New USB device strings: Mfr=1, Product=2, 
SerialNumber=3
[13149.491013] usb 1-1.1: Product: BV9900Pro
[13149.491026] usb 1-1.1: Manufacturer: Blackview
[13149.491038] usb 1-1.1: SerialNumber: 0123456789ABCDEF
[13149.552802] usbcore: registered new interface driver cdc_ether
[13149.570685] rndis_host 1-1.1:1.0 usb0: register 'rndis_host' at 
usb-3f980000.usb-1.1, RNDIS device, 1a:18:27:db:d4:94
[13149.572522] usbcore: registered new interface driver rndis_host
[13348.215923] usb 1-1.4: new full-speed USB device number 10 using dwc2        
                 [13348.438201] usb 1-1.4: New USB device found, idVendor=1a61, 
idProduct=3650, bcdDevice= 1.00
[13348.438231] usb 1-1.4: New USB device strings: Mfr=1, Product=2, 
SerialNumber=0
[13348.438246] usb 1-1.4: Product: ADC Reader
[13348.438258] usb 1-1.4: Manufacturer: Abbott Diabetes Care
[13348.442691] hid-generic 0003:1A61:3650.0004: hiddev0,hidraw2: USB HID v10.10 
Device [Abbott Diabetes Care ADC Reader] on usb-3f980000.usb-1.4/input0
[13406.857997] dwc2 3f980000.usb: dwc2_hc_chhltd_intr_dma: Channel 1 - ChHltd 
set, but reason is unknown
[13406.867518] dwc2 3f980000.usb: hcint 0x00000002, intsts 0x04600009
[13407.349698] dwc2 3f980000.usb: dwc2_hc_chhltd_intr_dma: Channel 7 - ChHltd 
set, but reason is unknown
[13407.359207] dwc2 3f980000.usb: hcint 0x00000002, intsts 0x04600009
[13407.446148] dwc2 3f980000.usb: dwc2_hc_chhltd_intr_dma: Channel 6 - ChHltd 
set, but reason is unknown
[13407.458024] dwc2 3f980000.usb: hcint 0x00000002, intsts 0x06600009
[13407.695978] dwc2 3f980000.usb: dwc2_hc_chhltd_intr_dma: Channel 2 - ChHltd 
set, but reason is unknown
[13407.710347] dwc2 3f980000.usb: hcint 0x00000002, intsts 0x04600009
[13471.148981] dwc2 3f980000.usb: dwc2_hc_chhltd_intr_dma: Channel 1 - ChHltd 
set, but reason is unknown
[13471.163264] dwc2 3f980000.usb: hcint 0x00000002, intsts 0x04600009
[13500.102426] dwc2 3f980000.usb: dwc2_hc_chhltd_intr_dma: Channel 3 - ChHltd 
set, but reason is unknown
[13500.116600] dwc2 3f980000.usb: hcint 0x00000002, intsts 0x04600009
[13500.354030] dwc2 3f980000.usb: dwc2_hc_chhltd_intr_dma: Channel 7 - ChHltd 
set, but reason is unknown
[13500.368102] dwc2 3f980000.usb: hcint 0x00000002, intsts 0x04600009
[13500.693224] dwc2 3f980000.usb: dwc2_hc_chhltd_intr_dma: Channel 1 - ChHltd 
set, but reason is unknown
[13500.707216] dwc2 3f980000.usb: hcint 0x00000002, intsts 0x04600009
[13518.115556] usb 1-1.4: USB disconnect, device number 10                      
                 [13528.671565] dwc2 3f980000.usb: dwc2_hc_chhltd_intr_dma: 
Channel 4 - ChHltd set, but reason is unknown
[13528.685560] dwc2 3f980000.usb: hcint 0x00000002, intsts 0x04600009           
                 [13540.882152] dwc2 3f980000.usb: dwc2_hc_chhltd_intr_dma: 
Channel 7 - ChHltd set, but reason is unknown
[13540.896160] dwc2 3f980000.usb: hcint 0x00000002, intsts 0x04600009
[13541.373991] dwc2 3f980000.usb: dwc2_hc_chhltd_intr_dma: Channel 0 - ChHltd 
set, but reason is unknown
[13541.387985] dwc2 3f980000.usb: hcint 0x00000002, intsts 0x06600009
[13541.623983] dwc2 3f980000.usb: dwc2_hc_chhltd_intr_dma: Channel 6 - ChHltd 
set, but reason is unknown
[13541.637959] dwc2 3f980000.usb: hcint 0x00000002, intsts 0x04600009
[13588.108344] dwc2 3f980000.usb: dwc2_hc_chhltd_intr_dma: Channel 7 - ChHltd 
set, but reason is unknown
[13588.122346] dwc2 3f980000.usb: hcint 0x00000002, intsts 0x06600009
[13588.212236] qmi_wwan 1-1.2.1:1.5: nonzero urb status received: -71
[13588.220923] qmi_wwan 1-1.2.1:1.5: wdm_int_callback - 0 bytes
[13588.259616] usb 1-1.2: USB disconnect, device number 4
[13588.259673] usb 1-1.2.1: USB disconnect, device number 5
[13588.261567] option1 ttyUSB0: GSM modem (1-port) converter now disconnected 
from ttyUSB0
[13588.261684] option 1-1.2.1:1.0: device disconnected
[13588.263888] option1 ttyUSB1: GSM modem (1-port) converter now disconnected 
from ttyUSB1
[13588.264036] option 1-1.2.1:1.1: device disconnected
[13588.266534] option1 ttyUSB2: GSM modem (1-port) converter now disconnected 
from ttyUSB2
[13588.266664] option 1-1.2.1:1.2: device disconnected
[13588.269675] option1 ttyUSB3: GSM modem (1-port) converter now disconnected 
from ttyUSB3
[13588.269828] option 1-1.2.1:1.3: device disconnected
[13588.272541] option1 ttyUSB4: GSM modem (1-port) converter now disconnected 
from ttyUSB4
[13588.272676] option 1-1.2.1:1.4: device disconnected
[13588.273421] qmi_wwan 1-1.2.1:1.5 wwan0: unregister 'qmi_wwan' 
usb-3f980000.usb-1.2.1, WWAN/QMI device
[13665.315561] usb 1-1.1: USB disconnect, device number 9
[13665.315872] rndis_host 1-1.1:1.0 usb0: unregister 'rndis_host' 
usb-3f980000.usb-1.1, RNDIS device
[14250.598584] usb 1-1.1: new high-speed USB device number 11 using dwc2
[14250.799448] usb 1-1.1: New USB device found, idVendor=1a40, idProduct=0101, 
bcdDevice= 1.11
[14250.799492] usb 1-1.1: New USB device strings: Mfr=0, Product=1, 
SerialNumber=0
[14250.799516] usb 1-1.1: Product: USB 2.0 Hub
[14250.800714] hub 1-1.1:1.0: USB hub found
[14250.800949] hub 1-1.1:1.0: 4 ports detected
[14257.002545] usb 1-1.1.1: new high-speed USB device number 12 using dwc2
[14257.214699] usb 1-1.1.1: New USB device found, idVendor=1e0e, 
idProduct=9001, bcdDevice= 3.18
[14257.214742] usb 1-1.1.1: New USB device strings: Mfr=1, Product=2, 
SerialNumber=3
[14257.214768] usb 1-1.1.1: Product: SimTech, Incorporated
[14257.214789] usb 1-1.1.1: Manufacturer: SimTech, Incorporated
[14257.214809] usb 1-1.1.1: SerialNumber: 0123456789ABCDEF
[14257.217428] option 1-1.1.1:1.0: GSM modem (1-port) converter detected
[14257.218156] usb 1-1.1.1: GSM modem (1-port) converter now attached to ttyUSB0
[14257.219274] option 1-1.1.1:1.1: GSM modem (1-port) converter detected
[14257.220165] usb 1-1.1.1: GSM modem (1-port) converter now attached to ttyUSB1
[14257.221368] option 1-1.1.1:1.2: GSM modem (1-port) converter detected
[14257.222145] usb 1-1.1.1: GSM modem (1-port) converter now attached to ttyUSB2
[14257.224342] option 1-1.1.1:1.3: GSM modem (1-port) converter detected
[14257.225243] usb 1-1.1.1: GSM modem (1-port) converter now attached to ttyUSB3
[14257.227283] option 1-1.1.1:1.4: GSM modem (1-port) converter detected
[14257.228123] usb 1-1.1.1: GSM modem (1-port) converter now attached to ttyUSB4
[14257.231533] qmi_wwan 1-1.1.1:1.5: cdc-wdm0: USB WDM device
[14257.235858] qmi_wwan 1-1.1.1:1.5 wwan0: register 'qmi_wwan' at 
usb-3f980000.usb-1.1.1, WWAN/QMI device, da:de:3e:d3:72:07
[14266.175446] qmi_wwan 1-1.1.1:1.5 wwan0: Cannot change a running device
[26978.792043] dwc2 3f980000.usb: dwc2_hc_chhltd_intr_dma: Channel 3 - ChHltd 
set, but reason is unknown
[26978.805955] dwc2 3f980000.usb: hcint 0x00000002, intsts 0x04600009
[26981.823345] dwc2 3f980000.usb: dwc2_hc_chhltd_intr_dma: Channel 0 - ChHltd 
set, but reason is unknown
[26981.837239] dwc2 3f980000.usb: hcint 0x00000002, intsts 0x04600009
[26984.855826] dwc2 3f980000.usb: dwc2_hc_chhltd_intr_dma: Channel 2 - ChHltd 
set, but reason is unknown
[26984.872681] dwc2 3f980000.usb: hcint 0x00000002, intsts 0x04600009
[26984.882732] dwc2 3f980000.usb: dwc2_update_urb_state_abn(): trimming xfer 
length
[29653.996678] brcmfmac: brcmf_cfg80211_set_power_mgmt: power save enabled
[29668.887360] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready
[40314.651586] brcmfmac: brcmf_cfg80211_set_power_mgmt: power save disabled
[48927.217103] Bluetooth: hci0: command 0x0804 tx timeout
[49513.256426] Bluetooth: hci0: link tx timeout
[49513.263055] Bluetooth: hci0: killing stalled connection 7e:c5:38:28:a7:a6
[49515.286360] Bluetooth: hci0: command 0x0406 tx timeout
[49517.207642] Bluetooth: hci0: link tx timeout
[49517.214274] Bluetooth: hci0: killing stalled connection 7e:c5:38:28:a7:a6
[49522.330390] Bluetooth: hci0: link tx timeout
[49522.338302] Bluetooth: hci0: killing stalled connection 7e:c5:38:28:a7:a6
[49523.354934] Bluetooth: hci0: link tx timeout
[49523.361601] Bluetooth: hci0: killing stalled connection 7e:c5:38:28:a7:a6
[49524.379429] Bluetooth: hci0: link tx timeout
[49524.385839] Bluetooth: hci0: killing stalled connection 7e:c5:38:28:a7:a6
[49578.678796] Bluetooth: hci0: link tx timeout
[49578.685157] Bluetooth: hci0: killing stalled connection 7e:c5:38:28:a7:a6
[49579.703275] Bluetooth: hci0: link tx timeout
[49579.710898] Bluetooth: hci0: killing stalled connection 7e:c5:38:28:a7:a6
[49580.727756] Bluetooth: hci0: link tx timeout
[49580.734136] Bluetooth: hci0: killing stalled connection 7e:c5:38:28:a7:a6
[49638.095950] Bluetooth: hci0: link tx timeout
[49638.102499] Bluetooth: hci0: killing stalled connection 7e:c5:38:28:a7:a6
[49639.120206] Bluetooth: hci0: link tx timeout
[49639.126426] Bluetooth: hci0: killing stalled connection 7e:c5:38:28:a7:a6
[49640.144590] Bluetooth: hci0: link tx timeout
[49640.150749] Bluetooth: hci0: killing stalled connection 7e:c5:38:28:a7:a6
[49697.509043] Bluetooth: hci0: link tx timeout
[49697.515171] Bluetooth: hci0: killing stalled connection 7e:c5:38:28:a7:a6
[49698.533304] Bluetooth: hci0: link tx timeout
[49698.539405] Bluetooth: hci0: killing stalled connection 7e:c5:38:28:a7:a6
[49699.557643] Bluetooth: hci0: link tx timeout
[49699.563679] Bluetooth: hci0: killing stalled connection 7e:c5:38:28:a7:a6
[49756.919063] Bluetooth: hci0: link tx timeout
[49756.925112] Bluetooth: hci0: killing stalled connection 7e:c5:38:28:a7:a6
[49757.943408] Bluetooth: hci0: link tx timeout
[49757.950288] Bluetooth: hci0: killing stalled connection 7e:c5:38:28:a7:a6
[49758.967570] Bluetooth: hci0: link tx timeout
[49758.973636] Bluetooth: hci0: killing stalled connection 7e:c5:38:28:a7:a6
[49816.090255] Bluetooth: hci0: link tx timeout
[49816.096463] Bluetooth: hci0: killing stalled connection 7e:c5:38:28:a7:a6
[49817.094842] Bluetooth: hci0: link tx timeout                                 
                 [49817.101129] Bluetooth: hci0: killing stalled connection 
7e:c5:38:28:a7:a6
[49818.118994] Bluetooth: hci0: link tx timeout
[49818.125222] Bluetooth: hci0: killing stalled connection 7e:c5:38:28:a7:a6
[49821.760166] Bluetooth: hci0: link tx timeout
[49821.766385] Bluetooth: hci0: killing stalled connection 7e:c5:38:28:a7:a6
[49822.792132] Bluetooth: hci0: link tx timeout
[49822.798222] Bluetooth: hci0: killing stalled connection 7e:c5:38:28:a7:a6
[49823.816366] Bluetooth: hci0: link tx timeout
[49823.822422] Bluetooth: hci0: killing stalled connection 7e:c5:38:28:a7:a6
[49827.440256] Bluetooth: hci0: link tx timeout
[49827.446427] Bluetooth: hci0: killing stalled connection 7e:c5:38:28:a7:a6
[49828.457452] Bluetooth: hci0: link tx timeout
[49828.463513] Bluetooth: hci0: killing stalled connection 7e:c5:38:28:a7:a6
[49829.481754] Bluetooth: hci0: link tx timeout
[49829.487880] Bluetooth: hci0: killing stalled connection 7e:c5:38:28:a7:a6
[49875.732203] Bluetooth: hci0: link tx timeout
[49875.738309] Bluetooth: hci0: killing stalled connection 7e:c5:38:28:a7:a6
[49876.756392] Bluetooth: hci0: link tx timeout
[49876.762523] Bluetooth: hci0: killing stalled connection 7e:c5:38:28:a7:a6
[49877.780558] Bluetooth: hci0: link tx timeout
[49877.786635] Bluetooth: hci0: killing stalled connection 7e:c5:38:28:a7:a6
[49935.136184] Bluetooth: hci0: link tx timeout
[49935.142266] Bluetooth: hci0: killing stalled connection 7e:c5:38:28:a7:a6
[49936.160333] Bluetooth: hci0: link tx timeout
[49936.166398] Bluetooth: hci0: killing stalled connection 7e:c5:38:28:a7:a6
[49937.184726] Bluetooth: hci0: link tx timeout
[49937.191967] Bluetooth: hci0: killing stalled connection 7e:c5:38:28:a7:a6
[49943.724925] Bluetooth: hci0: link tx timeout
[49943.731055] Bluetooth: hci0: killing stalled connection 7e:c5:38:28:a7:a6
[49944.737930] Bluetooth: hci0: link tx timeout
[49944.744000] Bluetooth: hci0: killing stalled connection 7e:c5:38:28:a7:a6
[49945.762112] Bluetooth: hci0: link tx timeout
[49945.768171] Bluetooth: hci0: killing stalled connection 7e:c5:38:28:a7:a6
[49946.788426] Bluetooth: hci0: link tx timeout
[49946.794500] Bluetooth: hci0: killing stalled connection 7e:c5:38:28:a7:a6
[49947.810564] Bluetooth: hci0: link tx timeout
[49947.817725] Bluetooth: hci0: killing stalled connection 7e:c5:38:28:a7:a6
[49948.834788] Bluetooth: hci0: link tx timeout
[49948.840943] Bluetooth: hci0: killing stalled connection 7e:c5:38:28:a7:a6
[49994.539055] Bluetooth: hci0: link tx timeout
[49994.546261] Bluetooth: hci0: killing stalled connection 7e:c5:38:28:a7:a6
[49995.563111] Bluetooth: hci0: link tx timeout
[49995.569212] Bluetooth: hci0: killing stalled connection 7e:c5:38:28:a7:a6
[49996.587246] Bluetooth: hci0: link tx timeout
[49996.593304] Bluetooth: hci0: killing stalled connection 7e:c5:38:28:a7:a6
[50053.940757] Bluetooth: hci0: link tx timeout
[50053.946815] Bluetooth: hci0: killing stalled connection 7e:c5:38:28:a7:a6    
                 [50054.964853] Bluetooth: hci0: link tx timeout
[50054.970922] Bluetooth: hci0: killing stalled connection 7e:c5:38:28:a7:a6
[50055.989045] Bluetooth: hci0: link tx timeout
[50055.995101] Bluetooth: hci0: killing stalled connection 7e:c5:38:28:a7:a6
[50113.341774] Bluetooth: hci0: link tx timeout
[50113.347831] Bluetooth: hci0: killing stalled connection 7e:c5:38:28:a7:a6
[50114.365882] Bluetooth: hci0: link tx timeout
[50114.372671] Bluetooth: hci0: killing stalled connection 7e:c5:38:28:a7:a6
[50115.390128] Bluetooth: hci0: link tx timeout
[50115.396441] Bluetooth: hci0: killing stalled connection 7e:c5:38:28:a7:a6
[50172.742470] Bluetooth: hci0: link tx timeout
[50172.748858] Bluetooth: hci0: killing stalled connection 7e:c5:38:28:a7:a6
[50173.766257] Bluetooth: hci0: link tx timeout
[50173.772317] Bluetooth: hci0: killing stalled connection 7e:c5:38:28:a7:a6
[50174.790404] Bluetooth: hci0: link tx timeout
[50174.796455] Bluetooth: hci0: killing stalled connection 7e:c5:38:28:a7:a6
[50232.142283] Bluetooth: hci0: link tx timeout
[50232.148451] Bluetooth: hci0: killing stalled connection 7e:c5:38:28:a7:a6
[50233.166381] Bluetooth: hci0: link tx timeout
[50233.172573] Bluetooth: hci0: killing stalled connection 7e:c5:38:28:a7:a6
[50234.190326] Bluetooth: hci0: link tx timeout
[50234.196407] Bluetooth: hci0: killing stalled connection 7e:c5:38:28:a7:a6
[50291.541651] Bluetooth: hci0: link tx timeout
[50291.547722] Bluetooth: hci0: killing stalled connection 7e:c5:38:28:a7:a6    
                 [50292.565696] Bluetooth: hci0: link tx timeout
[50292.571765] Bluetooth: hci0: killing stalled connection 7e:c5:38:28:a7:a6
[50293.589848] Bluetooth: hci0: link tx timeout
[50293.595969] Bluetooth: hci0: killing stalled connection 7e:c5:38:28:a7:a6
[50350.940951] Bluetooth: hci0: link tx timeout
[50350.947086] Bluetooth: hci0: killing stalled connection 7e:c5:38:28:a7:a6
[50351.964899] Bluetooth: hci0: link tx timeout
[50351.970971] Bluetooth: hci0: killing stalled connection 7e:c5:38:28:a7:a6
[50352.989022] Bluetooth: hci0: link tx timeout
[50352.995238] Bluetooth: hci0: killing stalled connection 7e:c5:38:28:a7:a6
[50429.755885] Bluetooth: hci0: link tx timeout
[50429.762110] Bluetooth: hci0: killing stalled connection 7e:c5:38:28:a7:a6
[50430.758214] Bluetooth: hci0: link tx timeout
[50430.764318] Bluetooth: hci0: killing stalled connection 7e:c5:38:28:a7:a6
[50431.782538] Bluetooth: hci0: link tx timeout
[50431.788691] Bluetooth: hci0: killing stalled connection 7e:c5:38:28:a7:a6
[50452.761044] Bluetooth: hci0: link tx timeout
[50452.767230] Bluetooth: hci0: killing stalled connection 7e:c5:38:28:a7:a6
[50453.768750] Bluetooth: hci0: link tx timeout
[50453.774808] Bluetooth: hci0: killing stalled connection 7e:c5:38:28:a7:a6
[50454.792893] Bluetooth: hci0: link tx timeout
[50454.798950] Bluetooth: hci0: killing stalled connection 7e:c5:38:28:a7:a6
[50913.104072] Bluetooth: hci0: link tx timeout
[50913.110136] Bluetooth: hci0: killing stalled connection 7e:c5:38:28:a7:a6
[51143.574920] Bluetooth: hci0: link tx timeout
[51143.581008] Bluetooth: hci0: killing stalled connection 7e:c5:38:28:a7:a6
[51144.594085] Bluetooth: hci0: link tx timeout
[51144.601016] Bluetooth: hci0: killing stalled connection 7e:c5:38:28:a7:a6
[51145.618086] Bluetooth: hci0: link tx timeout
[51145.624150] Bluetooth: hci0: killing stalled connection 7e:c5:38:28:a7:a6
[51818.478587] Bluetooth: hci0: link tx timeout
[51818.484645] Bluetooth: hci0: killing stalled connection 7e:c5:38:28:a7:a6
[51819.490618] Bluetooth: hci0: link tx timeout
[51819.497782] Bluetooth: hci0: killing stalled connection 7e:c5:38:28:a7:a6
[51820.514506] Bluetooth: hci0: link tx timeout
[51820.520717] Bluetooth: hci0: killing stalled connection 7e:c5:38:28:a7:a6
[52089.492356] Bluetooth: hci0: link tx timeout
[52089.498548] Bluetooth: hci0: killing stalled connection 7e:c5:38:28:a7:a6
[52090.516166] Bluetooth: hci0: link tx timeout
[52090.522239] Bluetooth: hci0: killing stalled connection 7e:c5:38:28:a7:a6
[52091.540085] Bluetooth: hci0: link tx timeout
[52091.546152] Bluetooth: hci0: killing stalled connection 7e:c5:38:28:a7:a6
[52156.085790] Bluetooth: hci0: link tx timeout
[52156.091860] Bluetooth: hci0: killing stalled connection 7e:c5:38:28:a7:a6
[52157.108272] Bluetooth: hci0: link tx timeout
[52157.115464] Bluetooth: hci0: killing stalled connection 7e:c5:38:28:a7:a6
[52158.132260] Bluetooth: hci0: link tx timeout
[52158.138415] Bluetooth: hci0: killing stalled connection 7e:c5:38:28:a7:a6
[52324.892743] Bluetooth: hci0: link tx timeout
[52324.898826] Bluetooth: hci0: killing stalled connection 7e:c5:38:28:a7:a6
[52325.904290] Bluetooth: hci0: link tx timeout
[52325.910354] Bluetooth: hci0: killing stalled connection 7e:c5:38:28:a7:a6
[52326.928229] Bluetooth: hci0: link tx timeout
[52326.934285] Bluetooth: hci0: killing stalled connection 7e:c5:38:28:a7:a6    
                 [52409.294374] Bluetooth: hci0: link tx timeout                
                                  [52409.301566] Bluetooth: hci0: killing 
stalled connection 7e:c5:38:28:a7:a6
[52410.316394] Bluetooth: hci0: link tx timeout
[52410.322554] Bluetooth: hci0: killing stalled connection 7e:c5:38:28:a7:a6
[52411.340275] Bluetooth: hci0: link tx timeout
[52411.346351] Bluetooth: hci0: killing stalled connection 7e:c5:38:28:a7:a6
[52469.301205] Bluetooth: hci0: link tx timeout
[52469.307286] Bluetooth: hci0: killing stalled connection 7e:c5:38:28:a7:a6
[52470.313166] Bluetooth: hci0: link tx timeout
[52470.319225] Bluetooth: hci0: killing stalled connection 7e:c5:38:28:a7:a6
[52471.337117] Bluetooth: hci0: link tx timeout
[52471.343180] Bluetooth: hci0: killing stalled connection 7e:c5:38:28:a7:a6
[52493.685765] Bluetooth: hci0: link tx timeout
[52493.691837] Bluetooth: hci0: killing stalled connection 7e:c5:38:28:a7:a6

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https://bugs.launchpad.net/bugs/1975908

Title:
  Ayant migré de l'os raspberrypi OS à Ubuntu pour des problèmes
  similaire :  le bluetooth ne suit pas le rythme (perte de connexion au
  smartphone, reste connecté, garde l'adresse IP assigné alors que
  inutilisable), c'est Titanic la wifi saute aléatoirement, le modem GSM
  officielle cablé sur le hat usb officielle  (4 port) semble subir des
  crash (device disconnected, connected,  dwc2_hc_chhltd_intr_dma:
  Channel 3 - ChHltd set, but reason is + wwan0: Cannot change a running
  device + dwc2_update_urb_state_abn(): trimming xfer length || hci0:
  killing stalled connection 7e:c8:46:a6:57:22 +  hci0: link tx timeout
  ||

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