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Re: Realtek Wireless USB Network Card and DKMS



Stefan Schumacher wrote: 
> Hello
> I recently bought a BrosTrend 650Mbps Linux Compatible Wiki Adapter
> (https://www.brostrend.com/products/ac5l) lsusb shows it to be a:
> 0bda:c811 Realtek Semiconductor Corp. 802.11ac NIC
> They seemed rather linux- and especially Debian-friendly and even have
> a web page just for Linux: https://linux.brostrend.com/
> 
> Clicking their link causes the installation of a kernel module via
> DKMS. Unfortunately it stops on my current Debian 12 with the error
> message copied at the end of the message. I bought this at Mindfactory
> and the support told me that they only give support to people who
> either bought directly from them or via Amazon. Doh.
> Does anybody have any suggestions on how I can get this device
> working? I mean it's Realtek, I remember using Realtek-8029 cards
> because they were a) cheap and b) worked always without problems.

... 
 
> - Original module
> 
> - No original module exists within this kernel
> 
> - Installation
> 
> - Installing to /lib/modules/6.1.0-32-amd64/updates/dkms/
> 
> depmod...
> 
> modprobe: ERROR: could not insert '8821cu': Key was rejected by service
> 
> Aborting, command failed: modprobe 8821cu

This is a secure-boot message; the kernel isn't allowed to load
this module because it isn't signed by the upstream key.

You can turn off secure-boot, if that's an option for you.

-dsr-


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