# apt-get install -y dkms git build-essential
# git clone https://github.com/cilynx/rtl88x2bu.git# cd rtl88x2buAfter changing the directory , key in all thisas shown below and press ENTER :VER=$(sed -n 's/PACKAGE_VERSION="\(.*\)"/\1/p' dkms.conf)
After that run the following Linux commands shown belowone by one :
sudo rsync -rvhP ./ /usr/src/rtl88x2bu-${VER}sudo dkms add -m rtl88x2bu -v ${VER}
sudo dkms build -m rtl88x2bu -v ${VER}
sudo dkms install -m rtl88x2bu -v ${VER}
# modprobe 88x2bu
# reboot
After that check if the adapter is detected or not
# ip a
# iwconfig
You should see a new wireless interface
(e.g., wlan0 or wlp2s0).
🧠 Troubleshooting Tips
If the adapter isn’t detected, try plugging it
into a different USB port.
Run dmesg | grep usb to check for USB recognition.
Use lsusb to confirm the device is listed.
MICROSOFT Copilot Answer
You're doing everything right — and this is a common
roadblock when building kernel modules like
your Wi-Fi driver. That error means your
system is missing the kernel headers needed
to compile the driver for your current kernel version.
Let’s fix it step by step 👇
🛠️ Step-by-Step: Fix “Kernel Headers Not Found” Error
✅ 1. Identify Your Exact Kernel Version
Run this command:
uname -rYou’ll see something like:
6.12.43+deb13-amd64
✅ 2. Install Matching Kernel Headers
Now install the headers for your kernel:
sudo apt update sudo apt install linux-headers-$(uname -r)If you get a “package not found” error, it means
the headers for your kernel version aren’t
available in the default repositories.
In that case:
🧪 3. Fix with a Compatible Kernel (if headers are
missing)
Sometimes custom or bleeding-edge kernels don’t have
headers in the repo. You can:
- Switch to a standard kernel:
sudo apt install linux-image-amd64
- Then reboot:
sudo reboot
After reboot, verify the new kernel:
uname -r
Then re-run your DKMS build:
cd ~/rtl88x2bu
VER=$(sed -n 's/PACKAGE_VERSION="\(.*\)"/\1/p' dkms.conf)
sudo rsync -rvhP ./ /usr/src/rtl88x2bu-${VER}
sudo dkms add -m rtl88x2bu -v ${VER}
sudo dkms build -m rtl88x2bu -v ${VER}
sudo dkms install -m rtl88x2bu -v ${VER}
Let me know what uname -r shows — I’ll help you
find the exact headers or guide you through
switching kernels safely.
You're almost there! github.com
Hi Copilot ....... after reboot ....... when i run the command " uname -r " .......... i got the message " 6.12.43+deb13-amd64 " ........ is this okay or i am suppose to get something else ? THANKS for the answer.
MICROSOFT Copilot Answer
Thanks for checking — and yes, that output confirms you're still running
the same custom kernel version:
6.12.43+deb13-amd64This is okay if you can install the matching kernel headers. But based
on your earlier error, it looks like Debian’s package repositories
don’t have headers for this specific kernel version, which is
why DKMS failed to build your Wi-Fi driver.
🧠 What You Can Do Next
✅ Option 1: Switch to a Standard Kernel (Recommended)
Install Debian’s default kernel and headers:
sudo apt install linux-image-amd64 linux-headers-amd64Then reboot:
sudo rebootAfter reboot, check your kernel again:
uname -rYou should see something like:
6.1.0-xx-amd64Now you’ll be able to install the headers with:
sudo apt install linux-headers-$(uname -r)Then retry the DKMS build steps for your Wi-Fi adapter.
🚫 Option 2: Stay on Custom Kernel (Advanced)
If you must stay on
6.12.43+deb13-amd64, you’ll needto manually locate or build the kernel headers — which is more complex
and not ideal for average users.
Let me know if you'd like help switching kernels or if you're okay trying
the manual header route — I’ll guide you either way!
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