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I installed elementary OS 7 on my laptop 2 days ago. In the beginning everything was working well, but today my Wifi simply stopped working. I can see no available connections in the network list and although I'm able to connect to the internet through a wired connection, I cannot create a hotspot on my computer. I'm not shown any error when I turn the hotspot on, but it doesn't show up as an available connection to other devices in the vicinity. Running dmesg shows the following error messages which I believe are related:

[  107.750470] rtw_8822be 0000:07:00.0: failed to read ASPM, ret=-5
[  109.749418] rtw_8822be 0000:07:00.0: failed to poll offset=0x5 mask=0x2 value=0x0
[  109.749434] rtw_8822be 0000:07:00.0: mac power on failed
[  109.749436] rtw_8822be 0000:07:00.0: failed to power on mac
[  109.749438] rtw_8822be 0000:07:00.0: leave idle state failed
[  109.749624] rtw_8822be 0000:07:00.0: failed to leave ips state

Running lspci reveals this to be my wifi card: Network controller: Realtek Semiconductor Co., Ltd. RTL8822BE 802.11a/b/g/n/ac WiFi adapter

Any help on solving this issue is much appreciated. Thanks in advance.

Update: After following Vlad's suggestions, some of the error messages disappeared, namely the ones related to ASPM, but I see the following new ones now:

[    6.568678] rtw_8822be 0000:07:00.0: Unable to change power state from D3cold to D0, device inaccessible
[    6.575083] rtw_8822be 0000:07:00.0: failed to setup chip efuse info
[    6.575114] rtw_8822be 0000:07:00.0: failed to setup chip information
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1 Answer 1

Reset to default
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I have the same adapter, and I had to install driver from https://github.com/lwfinger/rtw88 to make it work:

Install dependencies:
sudo apt-get update
sudo apt-get install make gcc linux-headers-$(uname -r) build-essential git

Clone the repo:
git clone https://github.com/lwfinger/rtw88.git

Build and install driver:
cd rtw88
make
sudo make install
sudo reboot

I now have 99% consistent WiFi connection, even between resumes & restarts.

OBSERVATIONS:

  1. You'll need to install the driver after every kernel update, so keep the cloned folder at hand.
    cd ~/rtw88
    git pull
    make
    sudo make install

  2. Sometimes, after a restart, WiFi will be off, trying sudo rfkill unblock all might work, or turn off laptop, remove power supply, wait a minute or two, power on laptop. Inside the repo folder there's a suspend script, might want to try it if you have serious issues with dead WiFi after suspend sudo cp suspend_rtw8822be /usr/lib/systemd/system-sleep/

  3. You may also need to turn aspm off after installing the driver:
    sudo nano /etc/modprobe.d/r8822be.conf
    inside this file paste options r8822be aspm=0
    Ctrl+O to save file
    Ctrl+X to close nano
    reboot

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  • I tried this, and although it worked at first, rebooting broke it again. I tried rebooting multiple times, and found that although the wifi works sometimes it's not nearly as consistent as yours. Any further ideas?
    – Gaurav Chandan
    May 30 at 11:21
  • You may also need to turn aspm off for the card. I added one extra step at my answer
    – Vlad
    May 30 at 14:29
  • I've now turned the aspm off as suggested. At the moment it seems to be working. Hopefully reboots won't break it like last time around
    – Gaurav Chandan
    May 30 at 15:13
  • I hope it stays stable. If it fails, in my case, it happens about 1 minute after power up. From what i read, it's a power management issue with the realtek chips, and also sometimes the OS cannot read the 'state' of the chip at power up
    – Vlad
    May 30 at 15:40
  • Sadly the stability does not seem to have improved. Although it was working yesterday, it has died again today. A notable thing however is that the ASPM related error messages don't show anymore, but there are new error messages that weren't there previously. I've appended these to the original post.
    – Gaurav Chandan
    Jun 1 at 4:04

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