lsb_release -d; # tested with Description: Debian GNU/Linux 11 (bullseye) uname -a Linux toplap 5.10.0-14-amd64 #1 SMP Debian 5.10.113-1 (2022-04-29) x86_64 GNU/Linux # when plugged before boot, it might work, but plug after boot, might result in errors and usb devices become unresponsive dmesg [ 1780.571980] usb 2-1: new high-speed USB device number 13 using xhci_hcd [ 1780.721903] usb 2-1: New USB device found, idVendor=7392, idProduct=7811, bcdDevice= 2.00 [ 1780.721908] usb 2-1: New USB device strings: Mfr=1, Product=2, SerialNumber=3 [ 1780.721911] usb 2-1: Product: 802.11n WLAN Adapter [ 1780.721913] usb 2-1: Manufacturer: Realtek [ 1780.721915] usb 2-1: SerialNumber: 00e04c000001 [ 1780.723671] rtl8192cu: Chip version 0x10 [ 1780.756726] rtl8192cu: Board Type 0 [ 1780.756802] rtl_usb: rx_max_size 15360, rx_urb_num 8, in_ep 1 [ 1780.756824] rtl8192cu: Loading firmware rtlwifi/rtl8192cufw_TMSC.bin [ 1780.756852] ieee80211 phy1: Selected rate control algorithm 'rtl_rc' [ 1780.759262] usb 2-1: firmware: failed to load rtlwifi/rtl8192cufw_TMSC.bin (-2) [ 1780.759267] usb 2-1: Direct firmware load for rtlwifi/rtl8192cufw_TMSC.bin failed with error -2 [ 1780.759279] usb 2-1: firmware: failed to load rtlwifi/rtl8192cufw.bin (-2) [ 1780.759281] usb 2-1: Direct firmware load for rtlwifi/rtl8192cufw.bin failed with error -2 [ 1780.759284] rtlwifi: Loading alternative firmware rtlwifi/rtl8192cufw.bin [ 1780.774186] rtl8192cu 2-1:1.0 wlx74da386f2162: renamed from wlan0 [ 1780.819038] rtl8192cu: MAC auto ON okay! [ 1780.831048] rtl8192cu: Tx queue select: 0x05 [ 1783.308380] usb 2-2.1: reset high-speed USB device number 12 using xhci_hcd [ 1783.510940] cdc_acm 2-2.1:1.1: ttyACM0: USB ACM device [ 1785.351738] rtl8192c_common: Polling FW ready fail! REG_MCUFWDL:0x00000006. [ 1785.351741] rtl8192c_common: Firmware is not ready to run! [ 1806.123277] rtl8192cu: MAC auto ON okay! [ 1806.138497] rtl8192cu: Tx queue select: 0x05 [ 1809.711851] rtl8192c_common: Polling FW ready fail! REG_MCUFWDL:0x00000006. [ 1809.711854] rtl8192c_common: Firmware is not ready to run! [ 1838.054441] rtl8192cu: MAC auto ON okay! [ 1838.065727] rtl8192cu: Tx queue select: 0x05 [ 1838.572537] rtl8192c_common: Polling FW ready fail! REG_MCUFWDL:0x00000006. [ 1838.572541] rtl8192c_common: Firmware is not ready to run! [ 1863.343098] wlx74da386f2162: authenticate with .... lsusb Bus 002 Device 003: ID 7392:7811 Edimax Technology Co., Ltd EW-7811Un 802.11n Wireless Adapter [Realtek RTL8188CUS] lsmod|grep rtl8192cu rtl8192cu 81920 0 rtl_usb 24576 1 rtl8192cu rtl8192c_common 65536 1 rtl8192cu rtlwifi 102400 3 rtl8192c_common,rtl_usb,rtl8192cu mac80211 983040 3 rtl_usb,rtl8192cu,rtlwifi usbcore 323584 8 xhci_hcd,ehci_pci,usbhid,rtl_usb,rtl8192cu,uvcvideo,ehci_hcd,xhci_pci lsusb -vvv -s 002:003 Bus 002 Device 003: ID 7392:7811 Edimax Technology Co., Ltd EW-7811Un 802.11n Wireless Adapter [Realtek RTL8188CUS] Device Descriptor: bLength 18 bDescriptorType 1 bcdUSB 2.00 bDeviceClass 0 bDeviceSubClass 0 bDeviceProtocol 0 bMaxPacketSize0 64 idVendor 0x7392 Edimax Technology Co., Ltd idProduct 0x7811 EW-7811Un 802.11n Wireless Adapter [Realtek RTL8188CUS] bcdDevice 2.00 iManufacturer 1 Realtek iProduct 2 802.11n WLAN Adapter iSerial 3 00e04c000001 bNumConfigurations 1 Configuration Descriptor: bLength 9 bDescriptorType 2 wTotalLength 0x002e bNumInterfaces 1 bConfigurationValue 1 iConfiguration 0 bmAttributes 0xa0 (Bus Powered) Remote Wakeup MaxPower 500mA Interface Descriptor: bLength 9 bDescriptorType 4 bInterfaceNumber 0 bAlternateSetting 0 bNumEndpoints 4 bInterfaceClass 255 Vendor Specific Class bInterfaceSubClass 255 Vendor Specific Subclass bInterfaceProtocol 255 Vendor Specific Protocol iInterface 0 Endpoint Descriptor: bLength 7 bDescriptorType 5 bEndpointAddress 0x81 EP 1 IN bmAttributes 2 Transfer Type Bulk Synch Type None Usage Type Data wMaxPacketSize 0x0200 1x 512 bytes bInterval 0 Endpoint Descriptor: bLength 7 bDescriptorType 5 bEndpointAddress 0x02 EP 2 OUT bmAttributes 2 Transfer Type Bulk Synch Type None Usage Type Data wMaxPacketSize 0x0200 1x 512 bytes bInterval 0 Endpoint Descriptor: bLength 7 bDescriptorType 5 bEndpointAddress 0x03 EP 3 OUT bmAttributes 2 Transfer Type Bulk Synch Type None Usage Type Data wMaxPacketSize 0x0200 1x 512 bytes bInterval 0 Endpoint Descriptor: bLength 7 bDescriptorType 5 bEndpointAddress 0x84 EP 4 IN bmAttributes 3 Transfer Type Interrupt Synch Type None Usage Type Data wMaxPacketSize 0x0040 1x 64 bytes bInterval 1 Device Qualifier (for other device speed): bLength 10 bDescriptorType 6 bcdUSB 2.00 bDeviceClass 0 bDeviceSubClass 0 bDeviceProtocol 0 bMaxPacketSize0 64 bNumConfigurations 1 can't get debug descriptor: Resource temporarily unavailable Device Status: