Unable to connect to telnet when attempting to port to LG V30

hzyry2046

I'm trying to port Ubuntu Touch to my LG V30(korean variant),using Mi 6(xiaomi-sagit) as a reference,kernel from LineageOS as base,and Helium 11(is it too new for this android-9-stockrom device?),and clang(the kernel will fail to build without clang)
However,When I flashed it into joan for testing,I found that I can't connect to the phont by telnet or ssh.The dmesg -w shows that it has failed to boot.
For telnet,it will connect and disconnect immediately and then connection refused for later attempts.
For ssh,it won't connect.
The dmesg -w output is here:

 @hzyry2046  sudo dmesg -w | grep "usb 4-3"
[    1.041375] usb 4-3: new SuperSpeed USB device number 2 using xhci_hcd
[    1.055928] usb 4-3: New USB device found, idVendor=18d1, idProduct=d001, bcdDevice= 4.04
[    1.055943] usb 4-3: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[    1.055947] usb 4-3: Product: Failed to boot
[    1.055950] usb 4-3: Manufacturer: Halium initrd
[    1.055953] usb 4-3: SerialNumber: Halium initrd Debug telnet on port 23 on usb0 192.168.2.15 - also running udhcpd
[  513.512105] usb 4-3: USB disconnect, device number 2
[  528.390573] usb 4-3: new SuperSpeed USB device number 3 using xhci_hcd
[  528.404083] usb 4-3: New USB device found, idVendor=0000, idProduct=d001, bcdDevice= 4.04
[  528.404097] usb 4-3: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[  528.404101] usb 4-3: Product: LGM-V300L
[  528.404105] usb 4-3: Manufacturer: LGE
[  528.404108] usb 4-3: SerialNumber: LGMV300L3aac8b55
[  693.086062] usb 4-3: USB disconnect, device number 3
[  722.431730] usb 4-3: new SuperSpeed USB device number 4 using xhci_hcd
[  722.445637] usb 4-3: New USB device found, idVendor=18d1, idProduct=d001, bcdDevice= 4.04
[  722.445642] usb 4-3: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[  722.445645] usb 4-3: Product: Failed to boot
[  722.445647] usb 4-3: Manufacturer: Halium initrd
[  722.445650] usb 4-3: SerialNumber: halium-initrd
[  896.369669] usb 4-3: USB disconnect, device number 4
[  967.447600] usb 4-3: new SuperSpeed USB device number 5 using xhci_hcd
[  967.461360] usb 4-3: New USB device found, idVendor=0000, idProduct=d001, bcdDevice= 4.04
[  967.461363] usb 4-3: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[  967.461364] usb 4-3: Product: LGM-V300L
[  967.461366] usb 4-3: Manufacturer: LGE
[  967.461367] usb 4-3: SerialNumber: LGMV300L3aac8b55
[ 1007.975615] usb 4-3: USB disconnect, device number 5
[ 1036.319342] usb 4-3: new SuperSpeed USB device number 6 using xhci_hcd
[ 1036.333226] usb 4-3: New USB device found, idVendor=18d1, idProduct=d001, bcdDevice= 4.04
[ 1036.333242] usb 4-3: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[ 1036.333247] usb 4-3: Product: Failed to boot
[ 1036.333251] usb 4-3: Manufacturer: Halium initrd
[ 1036.333255] usb 4-3: SerialNumber: halium-initrd

(Sorry,I don't want any URL in my initial posts)
ip links show has these outputs:

 @hzyry2046  ip link show                  
2: wlp0s20f3: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP mode DORMANT group default qlen 1000
    link/ether d0:65:78:ac:bf:89 brd ff:ff:ff:ff:ff:ff
    altname wlxd06578acbf89
7: enp0s20f0u3: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UNKNOWN mode DEFAULT group default qlen 1000
    link/ether 06:20:a9:a5:4c:2b brd ff:ff:ff:ff:ff:ff
    altname enx0620a9a54c2b

(unrelevant connections removed)
Is there any other way to connect to the device without disassembling the phone?

hzyry2046

I have tried to get help from the ubports_porting telegram group,but automatically kicked and blacklisted due to my pastebin link