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as the title says my problem is that the wifi card is not detected and I do not know how to solve this. Here is the output of lspci -knn | grep Net -A3; rfkill list

07:00.0 Network controller [0280]: Realtek Semiconductor Co., Ltd. RTL8822BE 802.11a/b/g/n/ac WiFi adapter [10ec:b822] (rev ff)
    Kernel modules: rtw_8822be
08:00.0 Ethernet controller [0200]: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller [10ec:8168] (rev 15)
    Subsystem: Lenovo RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller [17aa:38b4]
0: ideapad_wlan: Wireless LAN
    Soft blocked: no
    Hard blocked: no
1: ideapad_bluetooth: Bluetooth
    Soft blocked: yes
    Hard blocked: no
2: hci0: Bluetooth
    Soft blocked: yes
    Hard blocked: no

Edit: I forgot to mention that the wifi card worked fine, but suddenly it did not detect any network and then I tired to restart the network manager sudo service network-manager restart and then the adapter was not detected.

Edit2: After disabling the secure boot and following this guide the outpout of lspci -knn | grep Net -A3; rfkill list remains the same:

07:00.0 Network controller [0280]: Realtek Semiconductor Co., Ltd. RTL8822BE 802.11a/b/g/n/ac WiFi adapter [10ec:b822] (rev ff)
    Kernel modules: rtw_8822be
08:00.0 Ethernet controller [0200]: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller [10ec:8168] (rev 15)
    Subsystem: Lenovo RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller [17aa:38b4]
0: ideapad_wlan: Wireless LAN
    Soft blocked: no
    Hard blocked: no
1: ideapad_bluetooth: Bluetooth
    Soft blocked: yes
    Hard blocked: no
2: hci0: Bluetooth
    Soft blocked: yes
    Hard blocked: no
mkr
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    Does this answer your question? [RTL8822be driver for Ubuntu 18.04 and 20.04](https://askubuntu.com/questions/1263141/rtl8822be-driver-for-ubuntu-18-04-and-20-04) – guiverc May 05 '21 at 08:12
  • Unfortunately no, DKMS tree already contains: 8812au-5.6.4.2_35491.20191025 – mkr May 05 '21 at 09:55
  • Is Secure Boot enabled? `mokutil --sb-state` – Jeremy31 May 05 '21 at 10:31
  • @Jeremy31 yes, it is – mkr May 05 '21 at 10:43
  • disable it as the kernel won't allow unsigned modules to load with it enabled – Jeremy31 May 05 '21 at 10:44
  • @Jeremy31 I did disable secure boot and then rebooted the device following this [guide](https://wiki.ubuntu.com/UEFI/SecureBoot/DKMS) but nothing changed, I don't know if I should do anything further. – mkr May 05 '21 at 11:06
  • Edit the post to include new results for `lspci -knn | grep Net -A3; rfkill list` – Jeremy31 May 05 '21 at 11:23
  • @Jeremy31 I did, but it seems to remain the same output. – mkr May 05 '21 at 11:57
  • See https://askubuntu.com/a/425180/300665 and post a link to wireless script result – Jeremy31 May 05 '21 at 15:58
  • Here it is [link](https://paste.ubuntu.com/p/wdxTNCfWDp/), I wish I will be able to understand it too one day. @Jeremy31 – mkr May 05 '21 at 18:56
  • Try `sudo modprobe rtw88` and post a URL for `dmesg | egrep -i 'rtl|rtw'| nc termbin.com 9999` – Jeremy31 May 05 '21 at 19:31
  • Hello @Jeremy31, I noticed after running the script you previously mentioned, the wifi card is detected but no there are no visible networks, anyway here is the [url](https://termbin.com/8gbi) – mkr May 06 '21 at 05:55
  • Try `echo "options rtw88_pci disable_aspm=1" | sudo tee /etc/modprobe.d/rtw.conf` then reboot – Jeremy31 May 06 '21 at 11:00
  • Nothing happened, I mean, wifi adapter is still not recognized. @Jeremy31 – mkr May 06 '21 at 12:05
  • Try updating the BIOS, https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1872984 comment 17 – Jeremy31 May 06 '21 at 12:08
  • My knowledge is limited in doing that... I noticed that the output of lspci -v is the [following](https://paste.ubuntu.com/p/K6PtZZFwj3/), could that be the issue ? – mkr May 06 '21 at 15:38

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