FIXthat solve the slow/intermittent Wi-Fi connection problem of the Realtek 8812BU Wireless LAN 802.11ac USB NICthat worked for meIf you have a Bluetooth

Realtek 8811CU driver for Raspberry Pi OS Driver for USB adapter with RTL8811CU chipset, only STA/Monitor mode is supported, no AP mode. A few known wireless cards that use this driver include Fastoe AC650 USB Wi-Fi Adapter TOTOLINK A650UA v3 D-Link - DWA-171C BrosTrend AC5L EDUP EP-AC1651 EDUP EP-AC1635 Cudy WU700 Tested with Raspberry Pi OS 32-bit Kernel Kernel Kernel Kernel Kernel Tested Raspberry Pi Devices Raspberry Pi 400 Raspberry Pi 4 Model B 2G Raspberry Pi 4 Model B 4G Raspberry Pi 4 Model B 8G Raspberry Pi Zero W Raspberry Pi Zero Raspberry Pi 3 B+ Raspberry Pi 2 B Installation Information To build, you have to retrieve source and run make, do following For Raspberry Pi OS kernel, clone the branch sudo apt install -y bc git dkms build-essential raspberrypi-kernel-headers git clone -b cd RTL8811CU_for_Raspbian make sudo make install sudo modprobe 8821cu sudo reboot For Raspberry Pi OS or earlier kernel sudo apt install -y bc git dkms build-essential raspberrypi-kernel-headers git clone cd RTL8811CU_for_Raspbian make sudo make install sudo modprobe 8821cu sudo reboot If fails to compile like /lib/modules/ No such file or directory. Stop piraspberrypi~/RTL8812BU_for_Raspbian $ make make ARCH=arm CROSS_COMPILE= -C /lib/modules/ M=/home/pi/RTL8812BU_for_Raspbian modules make[1] *** /lib/modules/ No such file or directory. Stop. make *** [Makefile2284 modules] Error 2 please run the rpi-source command to install the kernel headers for kernel sudo apt install -y bc git flex bison libssl-dev libncurses5-dev sudo wget -O /usr/local/bin/rpi-source && sudo chmod +x /usr/local/bin/rpi-source && /usr/local/bin/rpi-source -q -tag-update rpi-source then, re-make again. If fails to compile like this make ARCH=arm CROSS_COMPILE= -C /lib/modules/ M=/home/pi/rtl8821CU modules make[1] Entering directory '/home/pi/linux-f2f7e4b23d8788e96f81a7522b2f703e51c53e70' CC [M] /home/pi/rtl8821CU/core/ gcc error -mfloat-abi=soft and -mfloat-abi=hard may not be used together make[2] *** [scripts/ /home/pi/rtl8821CU/core/ Error 1 make[1] *** [Makefile1709 /home/pi/rtl8821CU] Error 2 make[1] Leaving directory '/home/pi/linux-f2f7e4b23d8788e96f81a7522b2f703e51c53e70' make *** [Makefile2214 modules] Error 2 please run the following command for AArch32 32-bit sudo cp /lib/modules/$uname -r/build/arch/arm/Makefile /lib/modules/$uname -r/build/arch/arm/Makefile.$date +%Y%m%d%H%M sudo sed -i 's/-msoft-float//' /lib/modules/$uname -r/build/arch/arm/Makefile sudo ln -s /lib/modules/$uname -r/build/arch/arm /lib/modules/$uname -r/build/arch/armv7l for AArch64 64-bit sudo cp /lib/modules/$uname -r/build/arch/arm64/Makefile /lib/modules/$uname -r/build/arch/arm64/Makefile.$date +%Y%m%d%H%M sudo sed -i 's/-mgeneral-regs-only//' /lib/modules/$uname -r/build/arch/arm64/Makefile then, re-make again. Enjoy!

Lespilotes Realtek ADDON RTL8811AU Wireless LAN 802.11ac USB 2.0 Network Adapter sont généralement intégrés (inclus avec votre système d'exploitation Windows®) et sont également accessibles via la plupart des mises à jour Windows®. Le pilote intégré prend en charge les fonctions essentielles du matériel Realtek ADDON RTL8811AU Wireless LAN 802.11ac USB ^{58 available drivers 8811CU Wireless LAN USB NIC Version Date 6 May 2022 INF file Size 13 MB 8811CU Wireless LAN USB NIC Version Date 19 April 2022 INF file Size 15 MB 8811CU Wireless LAN USB NIC Version Date 21 March 2022 INF file Size 15 MB 8811CU Wireless LAN USB NIC Version Date 3 March 2022 INF file Size 13 MB 8811CU Wireless LAN USB NIC Version Date 18 January 2022 INF file Size 15 MB 8811CU Wireless LAN USB NIC Version Date 29 December 2021 INF file Size 15 MB 8811CU Wireless LAN USB NIC Version Date 9 November 2021 INF file Size 12 MB 8811CU Wireless LAN USB NIC Version Date 29 September 2021 INF files Size 15 MB 8811CU Wireless LAN USB NIC Version Date 28 September 2021 INF file Size 15 MB 8811CU Wireless LAN USB NIC Version Date 3 September 2021 INF file Size 15 MB 8811CU Wireless LAN USB NIC Version Date 2 August 2021 INF file Size 15 MB 8811CU Wireless LAN USB NIC Version Date 25 June 2021 INF file Size 15 MB 8811CU Wireless LAN USB NIC Version Date 10 June 2021 INF file Size 15 MB 8811CU Wireless LAN USB NIC Version Date 10 March 2021 INF file Size 15 MB 8811CU Wireless LAN USB NIC Version Date 8 December 2020 INF file Size 15 MB 8811CU Wireless LAN USB NIC Version Date 8 December 2020 INF file Size 13 MB 8811CU Wireless LAN USB NIC Version Date 16 November 2020 INF file Size 13 MB 8811CU Wireless LAN USB NIC Version Date 20 October 2020 INF file Size 15 MB 8811CU Wireless LAN USB NIC Version Date 21 August 2020 INF file Size 15 MB 8811CU Wireless LAN USB NIC Version Date 21 July 2020 INF file Size MB 8811CU Wireless LAN USB NIC Version Date 7 July 2020 INF file Size 15 MB 8811CU Wireless LAN USB NIC Version Date 30 April 2020 INF files Size 16 MB Windows 11, 10, 8, 7x64/x86 8811CU Wireless LAN USB NIC Version Date 8 January 2020 INF file Size 14 MB 8811CU Wireless LAN USB NIC Version Date 2 December 2019 INF file Size 15 MB 8811CU Wireless LAN USB NIC Version Date 27 November 2019 INF file Size 13 MB 8811CU Wireless LAN USB NIC Version Date 28 August 2019 INF files Size 12 MB Windows 11, 10, 8, 7x64/x86 8811CU Wireless LAN USB NIC Version Date 30 July 2019 INF files Size 12 MB Windows 11, 10, 8, 7x64/x86 8811CU Wireless LAN USB NIC Version Date 18 July 2019 INF files Size 11 MB 8811CU Wireless LAN USB NIC Version Date 28 May 2019 INF files Size 11 MB Windows 11, 10, 8, 7, Vistax64 8811CU Wireless LAN USB NIC Version Date 22 March 2019 INF files Size 11 MB Windows 11, 10, 8, 7x64/x86 8811CU Wireless LAN USB NIC Version Date 7 March 2019 INF files Size MB Windows 11, 10, 8, 7, Vistax64 8811CU Wireless LAN USB NIC Version Date 31 January 2019 INF file Size MB 8811CU Wireless LAN USB NIC Version Date 18 January 2019 INF file Size MB 8811CU Wireless LAN USB NIC Version Date 18 January 2019 INF file Size MB 8811CU Wireless LAN USB NIC Version Date 6 November 2018 INF files Size MB Windows 11, 10, 8, 7, Vista, XPx64/x86 8811CU Wireless LAN USB NIC Version Date 29 August 2018 INF files Size 11 MB Windows 11, 10, 8, 7x64/x86 8811CU Wireless LAN USB NIC Version Date 28 August 2018 INF files Size 13 MB 8811CU Wireless LAN USB NIC Version Date 20 August 2018 INF files Size MB Windows 11, 10, 8, 7x64/x86 8811CU Wireless LAN USB NIC Version Date 25 June 2018 INF files Size MB Windows 11, 10, 8, 7x64/x86 8811CU Wireless LAN USB NIC Version Date 17 May 2018 INF file Size MB Windows 11, 10, 8, 7, Vista, XPx64 8811CU Wireless LAN USB NIC Version Date 3 May 2018 INF file Size MB 8811CU Wireless LAN USB NIC Version Date 18 April 2018 INF files Size 8 MB Windows 11, 10, 8, 7x64 8811CU Wireless LAN USB NIC Version Date 30 March 2018 INF files Size MB 8811CU Wireless LAN USB NIC Version Date 27 February 2018 INF files Size MB Windows 11, 10, 8, 7, Vistax64/x86 8811CU Wireless LAN USB NIC Version Date 12 February 2018 INF file Size 7 MB Windows 11, 10, 8, 7x64 8811CU Wireless LAN USB NIC Version Date 31 January 2018 INF files Size MB Windows 11, 10, 8, 7, Vista, XPx64/x86 8811CU Wireless LAN USB NIC Version Date 25 December 2017 INF files Size MB Windows 11, 10, 8, 7, Vistax64/x86 8811CU Wireless LAN USB NIC Version Date 29 November 2017 INF files Size MB Windows 11, 10, 8, 7x64/x86 8811CU Wireless LAN USB NIC Version Date 16 November 2017 INF files Size MB Windows 11, 10, 8, 7, Vista, XPx64/x86 8811CU Wireless LAN USB NIC Version Date 21 September 2017 INF files Size MB Windows 11, 10, 8, 7x64/x86 8811CU Wireless LAN USB NIC Version Date 11 September 2017 INF files Size MB Windows 11, 10, 8, 7, Vistax64/x86 8811CU Wireless LAN USB NIC Version Date 4 August 2017 INF files Size MB Windows 11, 10, 8, 7, Vista, XPx64/x86 8811CU Wireless LAN USB NIC Version Date 4 July 2017 INF files Size MB Windows 11, 10, 8, 7x64 8811CU Wireless LAN USB NIC Version Date 8 June 2017 INF files Size MB Windows 11, 10, 8, 7x64/x86 8811CU Wireless LAN USB NIC Version Date 3 May 2017 INF files Size MB Windows 11, 10, 8, 7x64/x86 8811CU Wireless LAN USB NIC Version Date 6 April 2017 INF files Size MB Windows 11, 10, 8, 7, Vista, XPx64/x86 8811CU Wireless LAN USB NIC Version Date 20 February 2017 INF file Size MB 8811CU Wireless LAN USB NIC Version Date 6 January 2017 INF files Size MB Windows 11, 10, 8, 7x64} ^{Buildand install with DKMS. DKMS is a system which will automatically recompile and install a kernel module when a new kernel gets installed or updated. To make use of DKMS, install the dkms package, which on Debian (based) systems is done like this: apt-get install dkms. To make use of the DKMS feature with this project, do the following:} Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community. Pick a username Email Address Password By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails. Already on GitHub? Sign in to your account

Realtek8811CU driver for Raspberry Pi OS. Driver for 802.11ac USB adapter with RTL8811CU chipset, only STA/Monitor mode is supported, no AP mode. A few known wireless cards that use this driver include: Fastoe AC650 USB Wi-Fi Adapter; TOTOLINK A650UA v3; D-Link - DWA-171C; BrosTrend AC5L ; EDUP EP-AC1651; EDUP EP-AC1635; Cudy WU700; Tested with

^{I'm new here, so apologies if this is the wrong forum, but I do need to debug this setup script so it seems appropriate enough. I bought a USB WiFi chip on Amazon the Ourlink AC600 which uses the Realtek 8811CU chipset and the installation script it comes with for Linux is giving me errors right off the bat. I tried more or less to debug but I'm simply awful with shell scripts so I didn't make too much progress. Here's the output of running chmod +x && / Realtek Wi-Fi driver Auto installation script November, 21 2011 Decompress the driver source tar ball tar Old option 'f' requires an argument. Try 'tar -help' or 'tar -usage' for more information. ./ line 25 cd Not a directory Authentication requested [root] for make clean make *** No rule to make target 'clean'. Stop. Authentication requested [root] for make driver make *** No targets specified and no makefile found. Stop. Compile make driver error 2 Please check error Mesg After I figured it was trying to decompress an archive that wasn't there as the only archive present is a .rar I edited the script to search for rar files instead by changing the variable to grep .rar instead of . on line 18 and 23. I then changed the tar extraction command to "unrar e" as it was no longer trying to extract a tar ball. When I ran it I got this output. Pastebin as it's rather long. And while I would go ahead and check the error message, the driver package includes no such references. Evidently next time I should buy from a name brand. Here's pastebins of the contents of and the respective Makefile the script uses, as they seem important. If anyone has any ideas, is in need of more info, or has a working driver for the 8811CU, please let me know! As I'm a total newbie when it comes to debugging driver install scripts, any pointers would be appreciated. Thanks in advance. And I'm on Ubuntu for reference.}

InstallRealtek 8811CU Wireless LAN 802.11AC USB NIC Driver Linux Mint - GitHub - Br3n0k/Install-RealTek8811CU-HiveOS: Install Realtek 8811CU Wireless LAN 802.11AC USB NIC Driver Linux Mint. Skip to content. Sign up Product Features Mobile Actions Codespaces Copilot Packages Security Code review Issues

ID 0bdab812 Realtek Semiconductor Corp. RTL88x2bu only, rtl8822BU chipset 0bdab812 0bdac820 rtl8821cu WiFi Bluetooth USB 0bdac820 Bus 001 Device 007 ID 0bdac820 Realtek Semiconductor Corp. NIC The device is supported by the following drivers lwfinger/rtl8723au_bt 不能用，NG brektrou/rtl8821CU 不能用，NG smp79/rtl8821CU 不能用，NG whitebatman2/rtl8821CU 不能用，NG 不能用，NG *** 备注：能用的在本文的最下面失败： [roothpi7 drivers] [roothpi7 drivers] git clone Cloning into 'rtl88x2bu'... remote Enumerating objects 1871, done. remote Counting objects 100% 138/138, done. remote Compressing objects 100% 94/94, done. remote Total 1871 delta 73, reused 96 delta 42, pack-reused 1733 Receiving objects 100% 1871/1871, MiB MiB/s, done. Resolving deltas 100% 1188/1188, done. [roothpi7 drivers] ls rtl8812au rtl88x2bu [roothpi7 drivers] cd rtl88 rtl8812au/ rtl88x2bu/ [roothpi7 drivers] cd rtl88x2bu/ [roothpi7 rtl88x2bu] ls clean core hal ifcfg-wlan0 include Kconfig LICENSE Makefile os_dep platform runwpa wlan0dhcp [roothpi7 rtl88x2bu] VER=$sed -n 's/\PACKAGE_VERSION="\.*\"/\1/p' [roothpi7 rtl88x2bu] rsync -rvhP ./ /usr/src/rtl88x2bu-${VER} sending incremental file list created directory /usr/src/ ./ .gitignore 422 100% 00000 xfr1, to-chk=704/706 Kconfig .git/objects/pack/ .git/objects/pack/pack-7aa47d04 100% 00000 xfr36, to-chk=651/706 ...... platform/ 100% 00000 xfr660, to-chk=2/706 platform/ 100% 00000 xfr661, to-chk=1/706 platform/ 989 100% 00000 xfr662, to-chk=0/706 sent bytes received bytes bytes/sec total size is speedup is [roothpi7 rtl88x2bu] [roothpi7 rtl88x2bu] dkms add -m rtl88x2bu -v ${VER} Creating symlink /var/lib/dkms/rtl88x2bu/ -> /usr/src/ DKMS add completed. [roothpi7 rtl88x2bu] [roothpi7 rtl88x2bu] dkms build -m rtl88x2bu -v ${VER} Kernel preparation unnecessary for this kernel. Skipping... Building module cleaning build area... make -j8 KERNELRELEASE= KVER= src=/usr/src/ exit status 2 Error! Bad return status for module build on kernel x86_64 Consult /var/lib/dkms/rtl88x2bu/ for more information. F*** ！ [roothpi7 rtl88x2bu] ls clean core hal ifcfg-wlan0 include Kconfig LICENSE Makefile os_dep platform runwpa wlan0dhcp [roothpi7 rtl88x2bu] chmod +x ./ [roothpi7 rtl88x2bu] ./ Kernel preparation unnecessary for this kernel. Skipping... Building module cleaning build area... make -j8 KERNELRELEASE= KVER= src=/usr/src/ exit status 2 Error! Bad return status for module build on kernel x86_64 Consult /var/lib/dkms/rtl88x2bu/ for more information. [roothpi7 rtl88x2bu] make all make ARCH=x86_64 CROSS_COMPILE= -C /lib/modules/ M=/root/drivers/rtl88x2bu modules make[1] Entering directory '/usr/src/kernels/ CC [M] /root/drivers/rtl88x2bu/core/ ^~~~~~~~ /root/drivers/rtl88x2bu/os_dep/linux/ note each undeclared identifier is reported only once for each function it appears in make[2] *** [scripts/ /root/drivers/rtl88x2bu/os_dep/linux/ Error 1 make[1] *** [Makefile1860 /root/drivers/rtl88x2bu] Error 2 make[1] Leaving directory '/usr/src/kernels/ make *** [Makefile2284 modules] Error 2 F*** ！ [roothpi7 rtl88x2bu] [roothpi7 rtl88x2bu] make uninstall rm -f /lib/modules/ /sbin/depmod -a NG NG NG NG NG RTL8812AU/21AU and RTL8814AU linux driver with monitor mode and frame injection The master branch is based on branch git clone [roothpi7 drivers] cd rtl8812au/ [roothpi7 rtl8812au] ls android core docs hal include Kconfig LICENSE Makefile os_dep platform tools [roothpi7 rtl8812au] [roothpi7 rtl8812au] make all make ARCH=x86_64 CROSS_COMPILE= -C /lib/modules/ M=/root/drivers/rtl8812au modules make[1] Entering directory '/usr/src/kernels/ CC [M] /root/drivers/rtl8812au/core/ CC [M] /root/drivers/rtl8812au/core/ ...... CC [M] /root/drivers/rtl8812au/core/ LD [M] /root/drivers/rtl8812au/ MODPOST /root/drivers/rtl8812au/ CC [M] /root/drivers/rtl8812au/ LD [M] /root/drivers/rtl8812au/ BTF [M] /root/drivers/rtl8812au/ Skipping BTF generation for /root/drivers/rtl8812au/ due to unavailability of vmlinux make[1] Leaving directory '/usr/src/kernels/ - Visit for support/reporting issues or check for newer versions branches of these drivers. - [roothpi7 rtl8812au] [roothpi7 rtl8812au] make install install -p -m 644 /lib/modules/ /sbin/depmod -a [roothpi7 rtl8812au] 看起来，成功一半，还差签名 MOK（Machine Owner Key）[roothpi7 rtl8812au] modprobe 88XXau -v insmod /lib/modules/ modprobe ERROR could not insert '88XXau' Key was rejected by service 签了名，还是不认网卡。型号错了就是死局......[roothpi7 ~] [roothpi7 ~] lsusb Bus 002 Device 001 ID 1d6b0003 Linux Foundation root hub Bus 001 Device 005 ID 0bda0153 Realtek Semiconductor Corp. 3-in-1 SD/SDHC/SDXC Card Reader Bus 001 Device 009 ID 0bdac820 Realtek Semiconductor Corp. NIC [roothpi7 ~] [roothpi7 ~] usb_modeswitch -KW -v 0bda -p c820 Take all parameters from the command line * usb_modeswitch handle USB devices with multiple modes * Version C Josua Dietze 2017 * Based on libusb1/libusbx ! PLEASE REPORT NEW CONFIGURATIONS ! DefaultVendor= 0x0bda DefaultProduct= 0xc820 StandardEject=1 Look for default devices ... found USB ID 0bda0153 vendor ID matched found USB ID 0bdac820 vendor ID matched product ID matched Found devices in default mode 1 Access device 009 on bus 001 Get the current device configuration ... Current configuration number is 1 Use interface number 0 with class 224 Error can't use storage command in MessageContent with interface 0; interface class is 224, expected 8. Abort F*** [roothpi7 ~] usb_modeswitch -KW -v 0bda -p 0153 Take all parameters from the command line * usb_modeswitch handle USB devices with multiple modes * Version C Josua Dietze 2017 * Based on libusb1/libusbx ! PLEASE REPORT NEW CONFIGURATIONS ! DefaultVendor= 0x0bda DefaultProduct= 0x0153 StandardEject=1 Look for default devices ... found USB ID 0bda0153 vendor ID matched product ID matched found USB ID 0bdac820 vendor ID matched Found devices in default mode 1 Access device 005 on bus 001 Get the current device configuration ... Current configuration number is 1 Use interface number 0 with class 8 Use endpoints 0x01 out and 0x82 in USB description data for identification - Manufacturer Generic Product Serial No. 2012000 - Sending standard EJECT sequence Looking for active drivers ... OK, driver detached Set up interface 0 Use endpoint 0x01 for message sending ... Trying to send message 1 to endpoint 0x01 ... OK, message successfully sent Read the response to message 1 CSW ... Response successfully read 13 bytes, status 0 Trying to send message 2 to endpoint 0x01 ... OK, message successfully sent Read the response to message 2 CSW ... Response successfully read 13 bytes, status 0 Trying to send message 3 to endpoint 0x01 ... OK, message successfully sent Read the response to message 3 CSW ... Response successfully read 13 bytes, status 0 Trying to send message 4 to endpoint 0x01 ... OK, message successfully sent Read the response to message 4 CSW ... Response successfully read 13 bytes, status 0 Reset response endpoint 0x82 Reset message endpoint 0x01 -> Run lsusb to note any changes. Bye! ......似乎，还是，这个看起来靠点谱 rtw88-usb mac80211 kernel driver currently supported chipset's 8723du 8822bu with variants 8821cu 8822cu It's under GPL license, and please feel free to use it. Also welcome to upstream to the Linux kernel if you want, and please refer to the branch, for_kernel_upstream, which meets the Linux coding style, and may be easier to upstream. Thank to many people's kind help on this project. BIG tanks to Ji-Pin Jou and Neo Jou, for the USB parts supports at least managed client and monitor mode. This driver is based on Realtek's rtw88 in Linux main trunk. [roothpi7 drivers] git clone Cloning into 'rtw88-usb'... remote Enumerating objects 3149, done. remote Counting objects 100% 1177/1177, done. remote Compressing objects 100% 493/493, done. remote Total 3149 delta 967, reused 869 delta 684, pack-reused 1972 Receiving objects 100% 3149/3149, MiB MiB/s, done. Resolving deltas 100% 2412/2412, done. [roothpi7 drivers] [roothpi7 drivers] [roothpi7 drivers] cd rtw88-usb/ [roothpi7 rtw88-usb] ls Kconfig LICENSE fw log Makefile [roothpi7 rtw88-usb] [roothpi7 rtw88-usb] make clean rm -f *.o .*.d *.a *.ko .*.cmd *.mod* *.order *.symvers *.tmp_versions [roothpi7 rtw88-usb] [roothpi7 rtw88-usb] make all make -C /lib/modules/ M=/root/drivers/rtw88-usb make[1] Entering directory '/usr/src/kernels/ CC [M] /root/drivers/rtw88-usb/ CC [M] /root/drivers/rtw88-usb/ ...... BTF [M] /root/drivers/rtw88-usb/ Skipping BTF generation for /root/drivers/rtw88-usb/ due to unavailability of vmlinux CC [M] /root/drivers/rtw88-usb/ LD [M] /root/drivers/rtw88-usb/ BTF [M] /root/drivers/rtw88-usb/ Skipping BTF generation for /root/drivers/rtw88-usb/ due to unavailability of vmlinux CC [M] /root/drivers/rtw88-usb/ LD [M] /root/drivers/rtw88-usb/ BTF [M] /root/drivers/rtw88-usb/ Skipping BTF generation for /root/drivers/rtw88-usb/ due to unavailability of vmlinux make[1] Leaving directory '/usr/src/kernels/ [roothpi7 rtw88-usb] [roothpi7 rtw88-usb] make load echo "Unload upstream drivers" Unload upstream drivers for m in rtw88_8723de rtw88_8723d rtw88_8822be rtw88_8822b \ rtw88_8821ce rtw88_8821c rtw88_8822ce rtw88_8821c \ rtw88_pci rtw88_core; \ do rmmod "$m" 2> /dev/null; done; make *** [Makefile116 load] Error 1 [roothpi7 rtw88-usb] [roothpi7 rtw88-usb] make install WARNING ========================================== you are about to install rtw88-usb drivers Wait 5 sec or CTRL-C rtw88-usb drivers installed [roothpi7 rtw88-usb] [roothpi7 rtw88-usb] make firmware WARNING ========================================== you are about to install rtw88-usb firmware Wait 5 sec or CTRL-C rtw88-usb firmware installed [roothpi7 rtw88-usb] 好吧，签名吧[roothpi7 signed-modules] ls /usr/src/kernels/$uname -r/scripts/sign-file /usr/src/kernels/ [roothpi7 signed-modules] vi sign-rtw88-usb [roothpi7 signed-modules] [roothpi7 signed-modules] cat ./sign-rtw88-usb !/bin/bash for modfile in $dirname $modinfo -n rtw88-usb/*.ko; do echo "Signing $modfile" /usr/src/kernels/$uname -r/scripts/sign-file sha256 \ /root/signed-modules/ \ /root/signed-modules/ "$modfile" done [roothpi7 signed-modules] [roothpi7 signed-modules] ls sign-rtw88-usb [roothpi7 signed-modules] chmod +x ./sign-rtw88-usb [roothpi7 signed-modules] ls sign-rtw88-usb [roothpi7 signed-modules] [roothpi7 signed-modules] ./sign-rtw88-usb Signing /lib/modules/ Signing /lib/modules/ Signing /lib/modules/ Signing /lib/modules/ Signing /lib/modules/ Signing /lib/modules/ Signing /lib/modules/ Signing /lib/modules/ Signing /lib/modules/ Signing /lib/modules/ Signing /lib/modules/ Signing /lib/modules/ Signing /lib/modules/ Signing /lib/modules/ Signing /lib/modules/ [roothpi7 signed-modules] [roothpi7 signed-modules] modprobe rtw88-usb [roothpi7 signed-modules] [roothpi7 signed-modules] lsmod grep 88 rtw88_usb 20480 0 rtw88_core 163840 1 rtw88_usb mac80211 1134592 3 iwlmvm,rtw88_core,rtw88_usb cfg80211 1003520 4 iwlmvm,rtw88_core,iwlwifi,mac80211 还是认不了网卡，NG 还是认不了网卡，NG （废话）为避免每次内核更新时又要手工重新编译驱动模块，看看是否要使用动态内核模块支持（DKMS 的一个重要特征是，如安装新的内核版本，它会“自动”编译所有DKMS模块）。...... Realtek RTL8821CE Driver This repository hosts the code for the Arch Linux AUR Package. It's targeting Linux > and is being developed for Arch Linux and Ubuntu No support will be provided for other Linux distributions or Linux Kernel versions outside of that range. 同样不能用，NG RTL8811CU and RTL8821CU driver The Realtek RTL8811CU-CG is a highly integrated single-chip that supports 1-stream solutions with Multi-user MIMO Multiple-Input, Multiple-Output and Wireless LAN WLAN USB interface controller. It combines a WLAN MAC, a 1T1R capable WLAN baseband, and RF in a single chip. The RTL8811CU-CG provides an outstanding solution for a high-performance integrated wireless device. USB high speed interface GHz Support GHz Support Supports concurrent mode operates as two virtual WLAN interfaces MIMO config - 1x1 MU-MIMO AC wave2 256 QAM 过程略......每次总是感觉山穷水尽的时候，就 *** 的看到曙光女神了。俺觉得答案总是藏在互联网的一个偏僻的角落，等着被发现。事后发现，这是唯一能用，还是这个好用仍旧重复上面的步骤，从 GITHUB 克隆别人的文件。BUILD，然后签名。[wenxuehpi7 ~]$ cd rtl8821cu581/ [wenxuehpi7 rtl8821cu581]$ ls [wenxuehpi7 rtl8821cu581]$ rm *.* -rf [wenxuehpi7 rtl8821cu581]$ ls [wenxuehpi7 rtl8821cu581]$ git clone Cloning into '8821cu'... remote Enumerating objects 1311, done. remote Counting objects 100% 187/187, done. remote Compressing objects 100% 132/132, done. remote Total 1311 delta 109, reused 119 delta 55, pack-reused 1124 Receiving objects 100% 1311/1311, MiB MiB/s, done. Resolving deltas 100% 663/663, done. [wenxuehpi7 rtl8821cu581]$ ls 8821cu [wenxuehpi7 rtl8821cu581]$ cd 8821cu/ [wenxuehpi7 8821cu]$ ls hal include Kconfig Makefile platform core LICENSE os_dep supported-device-IDs [wenxuehpi7 8821cu]$ sudo make all [sudo] password for wenxue make ARCH=x86_64 CROSS_COMPILE= -C /lib/modules/ M=/home/wenxue/rtl8821cu581/8821cu modules make[1] Entering directory '/usr/src/kernels/ CC [M] /home/wenxue/rtl8821cu581/8821cu/core/ CC [M] /home/wenxue/rtl8821cu581/8821cu/core/ ...... CC [M] /home/wenxue/rtl8821cu581/8821cu/hal/btc/ CC [M] /home/wenxue/rtl8821cu581/8821cu/hal/btc/ CC [M] /home/wenxue/rtl8821cu581/8821cu/platform/ CC [M] /home/wenxue/rtl8821cu581/8821cu/core/ LD [M] /home/wenxue/rtl8821cu581/8821cu/ MODPOST /home/wenxue/rtl8821cu581/8821cu/ CC [M] /home/wenxue/rtl8821cu581/8821cu/ LD [M] /home/wenxue/rtl8821cu581/8821cu/ BTF [M] /home/wenxue/rtl8821cu581/8821cu/ Skipping BTF generation for /home/wenxue/rtl8821cu581/8821cu/ due to unavailability of vmlinux make[1] Leaving directory '/usr/src/kernels/ [wenxuehpi7 8821cu]$ [wenxuehpi7 8821cu]$ [wenxuehpi7 8821cu]$ sudo make install install -p -m 644 /lib/modules/ /sbin/depmod -a [wenxuehpi7 8821cu]$ [wenxuehpi7 8821cu]$ modprobe 8821cu modprobe ERROR could not insert '8821cu' Operation not permitted 又 ***** 的忘记签名 [wenxuehpi7 8821cu]$ su - Password [roothpi7 ~] [roothpi7 ~] cd signed-modules/ [roothpi7 signed-modules] ls sign-rtl88-aircrk sign-rtw88-usb [roothpi7 signed-modules] [roothpi7 signed-modules] cp sign-rtw88-usb sign-8821cu [roothpi7 signed-modules] vi ./sign-8821cu [roothpi7 signed-modules] [roothpi7 signed-modules] cat ./sign-8821cu !/bin/bash for modfile in $dirname $modinfo -n 8821cu/*.ko; do echo "Signing $modfile" /usr/src/kernels/$uname -r/scripts/sign-file sha256 \ /root/signed-modules/ \ /root/signed-modules/ "$modfile" done [roothpi7 signed-modules] [roothpi7 signed-modules] ./sign-8821cu Signing /lib/modules/ Signing /lib/modules/ [roothpi7 signed-modules] [roothpi7 signed-modules] modprobe -a 8821cu [roothpi7 signed-modules] iwconfig lo no wireless extensions. enp2s0 no wireless extensions. wlp4s0 IEEE ESSID"Linksys0****" ModeManaged Frequency GHz Access Point 48F8****** Bit Rate= Mb/s Tx-Power=22 dBm Retry short limit7 RTS throff Fragment throff Encryption keyoff Power Managementon Link Quality=58/70 Signal level=-52 dBm Rx invalid nwid0 Rx invalid crypt0 Rx invalid frag0 Tx excessive retries0 Invalid misc150 Missed beacon0 virbr0 no wireless extensions. wlp0s20f0u3i2 unassociated Nickname"WIFIRTL8821CU" ModeManaged Frequency= GHz Access Point Not-Associated Sensitivity0/0 Retryoff RTS throff Fragment throff Encryption keyoff Power Managementoff Link Quality0 Signal level0 Noise level0 Rx invalid nwid0 Rx invalid crypt0 Rx invalid frag0 Tx excessive retries0 Invalid misc0 Missed beacon0 [roothpi7 signed-modules]确认已经安装了 sign-file[roothpi7 signed-modules] ls /usr/src/kernels/$uname -r/scripts/sign-file /usr/src/kernels/ for modfile in $dirname $modinfo -n 8821cu/*.ko; do echo "Signing $modfile" /usr/src/kernels/$uname -r/scripts/sign-file sha256 \ /root/signed-modules/ \ /root/signed-modules/ "$modfile" done参考阅读 Signing VirtualBox Kernel Modules Signing Kernel Modules for Secure Boot Dynamic Kernel Module Support Tool -Provided by Package -Used on-Purposeopenssl openssl Build system Generates public and private key pairsign-file kernel-devel Build system Perl script used to sign kernel modulesperl perl Build system Perl interpreter used to run the signing scriptmokutil mokutil Target system Optional tool used to manually enroll the public keykeyctl keyutils Target system Optional tool used to display public keys in the system key ring[roothpi7 ~] dkms status rtl88x2bu, added [roothpi7 ~] [roothpi7 ~] dkms status rtl88x2bu, added [roothpi7 ~] [roothpi7 ~] dkms remove rtl88x2bu/ -all Error! The module/version combo is not located in the DKMS tree. [roothpi7 ~] [roothpi7 ~] dkms remove rtl88x2bu/ -all - Deleting module version completely from the DKMS tree. - Done. 过程俺留着，解决问题的手段是类似或者说一样的。方便寻找其他芯片 LINUX 驱动的读者去探索。吐槽一句：REALTEK 把驱动藏着掖着，也不知道为了什么。【磨难结束了】 Ily a un CD d'installation qui me fait installer Realtek USB Wireless LAN Utility mais lorsque je plug ma clé le pilote n'arrive pas à s'installer. On me dit que le pilote 802.11ac NIC est introuvable. J'ai recherché plusieurs sites sur internet pour l'installer mais soit c'est du virus soit ca ne marche pas. Si quelqu'un peut avoir ce pilote? Connexionwifi très instable avec carte realtek 8821CE + Modem Archer MR600; Wifi instable realtek 8822ce wireless lan 802.11ac pci-e nic; Problème connexion réseau avec Realtek RTL8723BE Wireless LAN 802.11n PCI-E NIC; Déconnexion successives du WIFI carte REALTEK RTL 8821 CE. Carte réseau Realtek introuvable macos11macos12 realtek 802.11n and 802.11ac wifi usb adapter Sort by reaction score; Forums. Macs. macOS. macOS Monterey (12) . chris1111 macrumors 6502. Original poster. Jul 8, 2015 282 617 Montréal Canada. Dec 15, 2021 #1 For Realtek 802.11n and 802.11ac USB Wi-Fi adapters 免费查询更多realtek8811cu wireless lan 802.11ac usb nic无线网卡驱动详细参数、实时报价、行情走势、优质商品批发/供应信息等，您 Treexy.Realtek Wireless LAN Driver for Windows 10 64-bit amp; 32-bit - Lenovo.Realtek 8811CU Wireless LAN 802.11ac USB NIC - Driver Download.Realtek Rtl8187 Wireless Windows10 - CNET Download.Realtek Wi-Fi Adapter Download - HP Support Community.Realtek Ethernet Lan Driver for Windows 10 10.031 Download.Realtek wireless Thechipset is most notable in use in the Netgear A6100 USB WiFi adapter 11ac Wi-Fi USB adapters with 2 When connected via ethernet cable, I am getting 50/50 Depending on the Wi-Fi driver version used, Intel® Wireless Adapters supporting 802 Realtek: OS: Driver version : Realtek Wireless LAN Adapter 8187B: 2000 / XP / Vista (32/64) 6 Realtek: OS: Driver version : Realtek Thisdevice is ID is from the Realtek 8811CU Wireless LAN 802.11ac USB NIC. Translate - अनुवाद करना - แปลภาษา -Menterjemahkan. 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ButMint has no clue about the Wif-Fi dongle. According to Windows Device Manager it is a Realtek 8811CU. I have an installation disc for it with "PC-Linux" software on it, but I have not been able to use it, I am mystified by all the errors that happen when I execute the "install.sh" on the CDROM.