Can't get wifi to work: 0bda:c820 Realtek Semiconductor Corp. 802.11ac NIC

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I have a realtek wifi and bluetooth adapter and only able to use blutooth and can’t get wifi to work wifi also i’m quite new at manjaro and linux c820 Realtek Semiconductor Corp. 802.11ac NIC

I have used Linux mint and Ubantu forums to try to fix this problem, The adapter is being recognized by Linux. I have used wine, but have only gone as far as reboot computer, but it is in wine, and i have not gotten farther than that.
lsusb
Bus 007 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 002 Device 003: ID 0bda:c820 Realtek Semiconductor Corp. 802.11ac NIC
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 006 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 005 Device 002: ID 062a:5918 MosArt Semiconductor Corp. 2.4G Keyboard Mouse
Bus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
can this adapter really work, or should i get a panda wireless adapter thanks

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Install rtl8821cu-dkms-git from the AUR.

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how do you download that, is it via the terminal? or, is it from the page itself?

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Please see: Arch User Repository - Manjaro

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i got this, i tried without the brackets, but it did not work so i tried it with and got this:

** (pamac:3279): WARNING **: 04:59:20.923: database.vala:1054: Error while compiling regular expression [link] at char 37: range out of order in character class

** (pamac:3279): WARNING **: 04:59:20.954: database.vala:1054: Error while compiling regular expression [link] at char 37: range out of order in character class

** (pamac:3279): WARNING **: 04:59:21.057: database.vala:1054: Error while compiling regular expression [link] at char 37: range out of order in character class

** (pamac:3279): WARNING **: 04:59:21.347: database.vala:1054: Error while compiling regular expression [link] at char 37: range out of order in character class

** (pamac:3279): WARNING **: 04:59:21.359: database.vala:1054: Error while compiling regular expression [link] at char 37: range out of order in character class

6

You tried what now? What brackets?

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on the arch user repostry the first stynax was: user $ pamac search -a [software package name]

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As the wiki page says, use the following. Notice the examples do not have brackets. They mean insert package name here.

pamac build rtl8821cu-dkms-git
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transaction finished, but it said there are missing kernal headers

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Install the linux kernel headers that apply to your kernel e.g. if using kernel 5.9:
linux59-headers-5.9.11-3-x86_64.pkg.tar.zst

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how do i do that?

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In whatever package manager you are using e.g Pamac, Octopi search for linux59-headers or whatever headers for the kernel you seek. It might be a good idea to read the Manjaro wiki:

https://wiki.manjaro.org/index.php/Using_Manjaro_for_Beginners

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it worked, im answering you on wifi, i just needed to update my kernel headers for it to work thank you I apriciate it

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