Hi,

I have a desktop pc that connects to the Internet via a wifi adapter - TP Link Archer T2U.
It worked out of the box before the update to 5.27. Not anymore.
it works just fine with Windows (installed on the same PC).

i have used the „nmcli device show” command and the output is (I have redacted the IP Address):

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GENERAL.DEVICE:                         enxce23dd6ff6c4
GENERAL.TYPE:                           ethernet
GENERAL.HWADDR:                         CE:23:DD:6F:F6:C4
GENERAL.MTU:                            1500
GENERAL.STATE:                          100 (connected)
GENERAL.CONNECTION:                     Wired connection 2
GENERAL.CON-PATH:                       /org/freedesktop/NetworkManager/ActiveConnection/1
WIRED-PROPERTIES.CARRIER:               on
IP4.ADDRESS[1]:                         192.../24
IP4.GATEWAY:                            192...
IP4.ROUTE[1]:                           dst = 192.../24, nh = 0.0.0.0, mt = 100
IP4.ROUTE[2]:                           dst = 0.0.0.0/0, nh = 192.168.212.42, mt = 100
IP4.ROUTE[3]:                           dst = 169.../16, nh = 0.0.0.0, mt = 1000
IP4.DNS[1]:                             192...
IP6.ADDRESS[1]:                         fe80::69f:57e3:9a7b:97af/64
IP6.GATEWAY:                            --
IP6.ROUTE[1]:                           dst = fe80::/64, nh = ::, mt = 1024

GENERAL.DEVICE:                         enp2s0
GENERAL.TYPE:                           ethernet
GENERAL.HWADDR:                         00:23:24:C6:B4:1C
GENERAL.MTU:                            1500
GENERAL.STATE:                          20 (unavailable)
GENERAL.CONNECTION:                     --
GENERAL.CON-PATH:                       --
WIRED-PROPERTIES.CARRIER:               off
IP4.GATEWAY:                            --
IP6.GATEWAY:                            --

GENERAL.DEVICE:                         lo
GENERAL.TYPE:                           loopback
GENERAL.HWADDR:                         00:00:00:00:00:00
GENERAL.MTU:                            65536
GENERAL.STATE:                          10 (unmanaged)
GENERAL.CONNECTION:                     --
GENERAL.CON-PATH:                       --
IP4.ADDRESS[1]:                         127.0.0.1/8
IP4.GATEWAY:                            --
IP6.ADDRESS[1]:                         ::1/128
IP6.GATEWAY:                            --
IP6.ROUTE[1]:                           dst = ::1/128, nh = ::, mt = 256


I have also used

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iw dev wlan0 link
command failed: No such device (-19)


and :

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raul_sebastian@raul-KDE:~$ sudo lsusb
[sudo] password for raul_sebastian:
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 008: ID 2717:ff80 Xiaomi Inc. Mi/Redmi series (RNDIS)
Bus 001 Device 006: ID 0bda:0129 Realtek Semiconductor Corp. RTS5129 Card Reader Controller
Bus 001 Device 005: ID 17ef:602d Lenovo Black Silk Keyboard
Bus 001 Device 004: ID 046d:0825 Logitech, Inc. Webcam C270
Bus 001 Device 003: ID 2357:012d TP-Link Archer T3U [Realtek RTL8812BU]
Bus 001 Device 002: ID 04d9:fc49 Holtek Semiconductor, Inc. USB Gaming Mouse
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub


my system is:

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00:00.0 Host bridge: Intel Corporation Xeon E3-1200 v5/E3-1500 v5/6th Gen Core Processor Host Bridge/DRAM Registers (rev 07)
   Subsystem: Lenovo Xeon E3-1200 v5/E3-1500 v5/6th Gen Core Processor Host Bridge/DRAM Registers
   Flags: bus master, fast devsel, latency 0
   Capabilities: <access denied>
   Kernel driver in use: skl_uncore

00:01.0 PCI bridge: Intel Corporation 6th-10th Gen Core Processor PCIe Controller (x16) (rev 07) (prog-if 00 [Normal decode])
   Flags: bus master, fast devsel, latency 0, IRQ 120
   Bus: primary=00, secondary=01, subordinate=01, sec-latency=0
   I/O behind bridge: 0000e000-0000efff [size=4K]
   Memory behind bridge: de000000-df0fffff [size=17M]
   Prefetchable memory behind bridge: 00000000c0000000-00000000d1ffffff [size=288M]
   Capabilities: <access denied>
   Kernel driver in use: pcieport

00:14.0 USB controller: Intel Corporation 100 Series/C230 Series Chipset Family USB 3.0 xHCI Controller (rev 31) (prog-if 30 [XHCI])
   Subsystem: Lenovo 100 Series/C230 Series Chipset Family USB 3.0 xHCI Controller
   Flags: bus master, medium devsel, latency 0, IRQ 123
   Memory at df210000 (64-bit, non-prefetchable) [size=64K]
   Capabilities: <access denied>
   Kernel driver in use: xhci_hcd
   Kernel modules: xhci_pci

00:16.0 Communication controller: Intel Corporation 100 Series/C230 Series Chipset Family MEI Controller #1 (rev 31)
   Subsystem: Lenovo 100 Series/C230 Series Chipset Family MEI Controller
   Flags: bus master, fast devsel, latency 0, IRQ 125
   Memory at df22d000 (64-bit, non-prefetchable) [size=4K]
   Capabilities: <access denied>
   Kernel driver in use: mei_me
   Kernel modules: mei_me

00:17.0 SATA controller: Intel Corporation Q170/Q150/B150/H170/H110/Z170/CM236 Chipset SATA Controller [AHCI Mode] (rev 31) (prog-if 01 [AHCI 1.0])
   Subsystem: Lenovo Q170/Q150/B150/H170/H110/Z170/CM236 Chipset SATA Controller [AHCI Mode]
   Flags: bus master, 66MHz, medium devsel, latency 0, IRQ 122
   Memory at df228000 (32-bit, non-prefetchable) [size=8K]
   Memory at df22c000 (32-bit, non-prefetchable) [size=256]
   I/O ports at f050 [size=8]
   I/O ports at f040 [size=4]
   I/O ports at f020 [size=32]
   Memory at df22b000 (32-bit, non-prefetchable) [size=2K]
   Capabilities: <access denied>
   Kernel driver in use: ahci
   Kernel modules: ahci

00:1c.0 PCI bridge: Intel Corporation 100 Series/C230 Series Chipset Family PCI Express Root Port #6 (rev f1) (prog-if 00 [Normal decode])
   Flags: bus master, fast devsel, latency 0, IRQ 121
   Bus: primary=00, secondary=02, subordinate=02, sec-latency=0
   I/O behind bridge: 0000d000-0000dfff [size=4K]
   Memory behind bridge: df100000-df1fffff [size=1M]
   Prefetchable memory behind bridge: 00000000d2100000-00000000d21fffff [size=1M]
   Capabilities: <access denied>
   Kernel driver in use: pcieport

00:1f.0 ISA bridge: Intel Corporation H110 Chipset LPC/eSPI Controller (rev 31)
   Subsystem: Lenovo H110 Chipset LPC/eSPI Controller
   Flags: bus master, medium devsel, latency 0

00:1f.2 Memory controller: Intel Corporation 100 Series/C230 Series Chipset Family Power Management Controller (rev 31)
   Subsystem: Lenovo 100 Series/C230 Series Chipset Family Power Management Controller
   Flags: fast devsel
   Memory at df224000 (32-bit, non-prefetchable) [disabled] [size=16K]

00:1f.3 Audio device: Intel Corporation 100 Series/C230 Series Chipset Family HD Audio Controller (rev 31)
   DeviceName:  Onboard Audio
   Subsystem: Lenovo 100 Series/C230 Series Chipset Family HD Audio Controller
   Flags: bus master, fast devsel, latency 32, IRQ 126
   Memory at df220000 (64-bit, non-prefetchable) [size=16K]
   Memory at df200000 (64-bit, non-prefetchable) [size=64K]
   Capabilities: <access denied>
   Kernel driver in use: snd_hda_intel
   Kernel modules: snd_hda_intel

00:1f.4 SMBus: Intel Corporation 100 Series/C230 Series Chipset Family SMBus (rev 31)
   Subsystem: Lenovo 100 Series/C230 Series Chipset Family SMBus
   Flags: medium devsel, IRQ 16
   Memory at df22a000 (64-bit, non-prefetchable) [size=256]
   I/O ports at f000 [size=32]
   Kernel driver in use: i801_smbus
   Kernel modules: i2c_i801

01:00.0 VGA compatible controller: NVIDIA Corporation GM107 [GeForce GTX 750 Ti] (rev a2) (prog-if 00 [VGA controller])
   DeviceName:  Onboard LAN
   Subsystem: Bitland(ShenZhen) Information Technology Co., Ltd. GM107 [GeForce GTX 750 Ti]
   Flags: bus master, fast devsel, latency 0, IRQ 127
   Memory at de000000 (32-bit, non-prefetchable) [size=16M]
   Memory at c0000000 (64-bit, prefetchable) [size=256M]
   Memory at d0000000 (64-bit, prefetchable) [size=32M]
   I/O ports at e000 [size=128]
   Expansion ROM at 000c0000 [virtual] [disabled] [size=128K]
   Capabilities: <access denied>
   Kernel driver in use: nvidia
   Kernel modules: nvidiafb, nouveau, nvidia_drm, nvidia

01:00.1 Audio device: NVIDIA Corporation GM107 High Definition Audio Controller [GeForce 940MX] (rev a1)
   Subsystem: Bitland(ShenZhen) Information Technology Co., Ltd. GM107 High Definition Audio Controller [GeForce 940MX]
   Flags: bus master, fast devsel, latency 0, IRQ 17
   Memory at df080000 (32-bit, non-prefetchable) [size=16K]
   Capabilities: <access denied>
   Kernel driver in use: snd_hda_intel
   Kernel modules: snd_hda_intel

02:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller (rev 0c)
   Subsystem: Lenovo RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller
   Flags: bus master, fast devsel, latency 0, IRQ 17
   I/O ports at d000 [size=256]
   Memory at df100000 (64-bit, non-prefetchable) [size=4K]
   Memory at d2100000 (64-bit, prefetchable) [size=16K]
   Capabilities: <access denied>
   Kernel driver in use: r8169
   Kernel modules: r8169

Not sure what to to next.
Thanks.

I have followed these instructions and fixed it.

https://github.com/morrownr/88x2bu-20210702

Now it works again.