Lubuntu 22.04升级内核至5.19.0-32-generic后TP-Link Archer T9UH v1.0无线网卡失效的修复咨询

Hey there, sorry to hear your TP-Link Archer T9UH v1.0 stopped working after that Lubuntu auto-update to kernel 5.19.0-32-generic. The core issue here is that the older rtl8814au/5.8.5.1 driver version you’re trying to use isn’t compatible with this newer kernel. Let’s fix this with these step-by-step actions:

1. Clean up the broken old driver first #

Before installing a working version, we need to fully remove the incompatible driver from your system:

• Remove the driver from DKMS:

  sudo dkms remove rtl8814au/5.8.5.1 --all
  

• Delete the leftover source files to avoid conflicts:

  sudo rm -rf /usr/src/rtl8814au-5.8.5.1
  

2. Install required build dependencies #

Compiling kernel modules needs specific tools and headers. Let’s make sure you have everything:

sudo apt update && sudo apt install build-essential dkms linux-headers-$(uname -r)

The linux-headers-$(uname -r) command automatically grabs the headers matching your current 5.19.0-32 kernel.

3. Install a kernel-compatible rtl8814au driver #

You’ll need a newer version of the rtl8814au driver that supports kernel 5.19. Here’s how to set it up with DKMS:

• Grab the latest community-maintained driver source (look for versions tagged 5.9.x or later, which support 5.19 kernels)
• Navigate into the driver source directory:

  cd rtl8814au
  

• Add the driver to DKMS:

  sudo dkms add .
  

• Install the driver (replace [latest-version-tag] with the actual version you downloaded, like 5.9.3.2):

  sudo dkms install rtl8814au/[latest-version-tag]
  

• Load the new module immediately:

  sudo modprobe 8814au
  

4. Fallback: Test with an older kernel (if needed) #

If you still run into issues, reboot your computer and access the GRUB menu (hold Shift during boot). Go to Advanced options for Lubuntu and select an older kernel version (like 5.19.0-30 or earlier) that worked before the update. If the wifi works here, it confirms the problem is strictly kernel-driver compatibility, and you just need to ensure you’re using the right driver version for 5.19.0-32.

5. Double-check system updates #

Make sure your system has all the latest packages installed, which can sometimes resolve hidden kernel-related conflicts:

sudo apt full-upgrade

After completing these steps, your TP-Link Archer T9UH v1.0 should be detected and working again with the 5.19.0-32-generic kernel.

备注：内容来源于stack exchange，提问作者Manimaran Manikam