RTL8852BE wifi sleep resume problem

Ask Fedora
1

ENVIRONMENT:

  • OS: Fedora Linux (KDE Plasma) 44
  • Kernel: Latest stable Fedora Kernel
  • Hardware: lenovo ideapad pro i9 ( 14IAH10) 83JK002GAD
  • CPU: Intel Core Ultra 285H
  • Network Controller: Realtek Semiconductor Co., Ltd. RTL8852BE PCIe 802.11ax Wireless Network Controller
  • Kernel driver in use: rtw89_8852be

THE PROBLEM:
Upon resuming the system from sleep (s2idle/S3), the Realtek Wi-Fi card is completely dead. NetworkManager cannot see any networks or interfaces. The card fails to wake up from its sleep state. Only a full hard reboot temporarily fixes the issue.

I used to solve this problem by AI made script before for resume but lost it. when I reinstalled fedorra I couldn’t fix.

Please help. I came back for fedora a month ago after having used it for a 3 years but 17 years ago.
Actually I am glad I am back

2

The AI was likely referencing the following page:

Here’s the code that was on that page:

#!/bin/sh

case "$1" in
    pre)
	modprobe -r rtw89_8852ce
	echo "we are suspending at $(date)..." > /tmp/systemd_suspend_rtw_driver
   	;;
    post)
        modprobe rtw89_8852ce
        ;;
esac

The blog post shows how they have put a bash script in /usr/lib/systemd/system-sleep to unload the kernel module for the card. If you decide to use this please be mindful to change the driver name as indicated in the blog post.

3

This is the one I used an hour ago and didn’t work

#!/bin/bash
case "$1" in
  pre)
    systemctl stop NetworkManager
    ip link set wlp1s0 down 2>/dev/null
    rfkill block wifi
    ;;
  post)
    modprobe rtw89_core 2>/dev/null
    modprobe rtw89_pci 2>/dev/null
    modprobe rtw89_8852be 2>/dev/null
    rfkill unblock wifi
    systemctl start NetworkManager
    ;;
esac
4

The easy means to test this is after a wake from sleep, I’d do the following:

sudo modprobe -r rtw89_8852be

then

sudo modprobe rtw89_8852be

5

This guide worked flawlessly

6

Glad you found a solution! Don’t forget to mark this resolved so others can resolve this issue too.