1

My WiFi stopped working after apt upgrade. No WiFi section appears in the network properties panel.

Here is the result of sudo lspci -v for my WiFi:

03:00.0 Network controller: Realtek Semiconductor Co., Ltd. RTL8822BE 802.11a/b/g/n/ac WiFi adapter
    Subsystem: AzureWave RTL8822BE 802.11a/b/g/n/ac WiFi adapter
    Flags: fast devsel, IRQ 255
    I/O ports at c000 [disabled] [size=256]
    Memory at ef100000 (64-bit, non-prefetchable) [disabled] [size=64K]
    Capabilities: [40] Power Management version 3
    Capabilities: [50] MSI: Enable- Count=1/1 Maskable- 64bit+
    Capabilities: [70] Express Endpoint, MSI 00
    Capabilities: [100] Advanced Error Reporting
    Capabilities: [148] Device Serial Number 00-e0-4c-ff-fe-b8-22-01
    Capabilities: [158] Latency Tolerance Reporting
    Capabilities: [160] L1 PM Substates
    Kernel modules: r8822be

Here is the response to sudo modprobe r8822be

[sudo] Mot de passe de romain : 
modprobe: ERROR: could not insert 'r8822be': Operation not permitted

Here is the result of grep -r r8822be /lib/modules

Fichier binaire /lib/modules/4.18.0-13-generic/kernel/drivers/staging/rtlwifi/r8822be.ko correspondant
Fichier binaire /lib/modules/4.18.0-13-generic/modules.dep.bin correspondant
Fichier binaire /lib/modules/4.18.0-13-generic/modules.symbols.bin correspondant
/lib/modules/4.18.0-13-generic/modules.order:kernel/drivers/staging/rtlwifi/r8822be.ko
/lib/modules/4.18.0-13-generic/modules.symbols:alias symbol:rtl_halmac_get_ops_pointer r8822be
/lib/modules/4.18.0-13-generic/modules.symbols:alias symbol:rtl_phydm_get_ops_pointer r8822be
/lib/modules/4.18.0-13-generic/modules.dep:kernel/drivers/staging/rtlwifi/r8822be.ko: kernel/net/mac80211/mac80211.ko kernel/net/wireless/cfg80211.ko
/lib/modules/4.18.0-13-generic/modules.alias:alias pci:v000010ECd0000B822sv*sd*bc*sc*i* r8822be
Fichier binaire /lib/modules/4.18.0-13-generic/modules.alias.bin correspondant
Fichier binaire /lib/modules/4.18.0-11-generic/kernel/drivers/staging/rtlwifi/r8822be.ko correspondant
Fichier binaire /lib/modules/4.18.0-11-generic/modules.dep.bin correspondant
Fichier binaire /lib/modules/4.18.0-11-generic/modules.symbols.bin correspondant
/lib/modules/4.18.0-11-generic/modules.order:kernel/drivers/staging/rtlwifi/r8822be.ko
/lib/modules/4.18.0-11-generic/modules.symbols:alias symbol:rtl_halmac_get_ops_pointer r8822be
/lib/modules/4.18.0-11-generic/modules.symbols:alias symbol:rtl_phydm_get_ops_pointer r8822be
/lib/modules/4.18.0-11-generic/modules.dep:kernel/drivers/staging/rtlwifi/r8822be.ko: kernel/net/mac80211/mac80211.ko kernel/net/wireless/cfg80211.ko
/lib/modules/4.18.0-11-generic/modules.alias:alias pci:v000010ECd0000B822sv*sd*bc*sc*i* r8822be
Fichier binaire /lib/modules/4.18.0-11-generic/modules.alias.bin correspondant

Any idea how I can get my WiFi card back running?

  • What is the exact response to the terminal command: sudo modprobe r8822be Welcome to Ask Ubuntu. – chili555 Jan 5 at 21:32
  • romain@romain-X705UDR:~$ sudo modprobe r8822be [sudo] Mot de passe de romain : 1 modprobe: ERROR: could not insert 'r8822be': Operation not permitted – Romain Jan 6 at 11:06
  • What's the output of grep -r r8822be /lib/modules ? – starkus Jan 6 at 11:54
  • I strongly feel that this is the issue: bugs.launchpad.net/ubuntu/+source/linux/+bug/1806472 "The r8822be module alias is intact, trying to modprobe it or insert results in a "operation not permitted" error. " Please disable Secure Boot. – chili555 Jan 6 at 16:25
  • I put the result in my question, too long for comment – Romain Jan 7 at 10:26
0

As said chili555 the bug is reported here: bugs.launchpad.net/ubuntu/+source/linux/+bug/1806472

Disabling Secure Boot in the BIOS is the workaround while waiting for real bug fix.

Your Answer

By clicking "Post Your Answer", you acknowledge that you have read our updated terms of service, privacy policy and cookie policy, and that your continued use of the website is subject to these policies.

Not the answer you're looking for? Browse other questions tagged or ask your own question.