Some further info: I rolled back to 19.10 using the 5.3.0-51-generic and rtwpci and rtw88 work well. But as stated before, when going to 5.4.0-28-generic (and -26) I am suffering from what appears to be this bug.
My wireless adapter is an RTL8822BE which shows up in lspci and lshw -C network, although under 5.4.0-28 lshw shows it as disabled (it appears to work for a few seconds after startup). dsmeg shows some issues with changing the power mode of the device although I am too much of a noob to understand it. Interestingly, wireless seemed to work on the 20.04 live version (from USB). As I said, I rolled back from 20.04 so I no longer have access to a 20.04 machine, but can reinstall it if there is any useful debugging to be done. -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1838133 Title: realtek r8822be kernel module fails after update to linux kernel- headers 5.0.0-21 Status in linux package in Ubuntu: Fix Released Status in linux source package in Disco: Fix Released Status in linux source package in Eoan: Fix Released Bug description: === SRU Justification === [Impact] Realtek Wifi stops working after the driver changed from rtlwifi to rtw88. [Fix] Sync rtw88 to upstream version, and use MSI on the device. [Test] User confirmed the backport fixes the issue. [Regression Potential] Low. Currently only 8822be uses rtw88. === Original Bug Report === On July 24th I upgraded to the latest linux-headers-5.0.0-21 as part of the dist-upgrade for latest packages in Disco Dingo 19.04. I didn't notice that wifi was no longer working because at work I exclusively use a wired Ethernet connection. Today, however, when I tried to use my realtek r8822be wireless card, I discovered that it was totally unresponsive and did not work with wpa_supplicant / wpa_cli even when invoked manually from the command line (let alone with NetworkManager). When the problem occurred, I was using 19.04's latest kernel 5.0.0-21. I then rebooted and selected kernel 5.0.0-20 from GRUB menu. "uname -a" shows that I am using the previous kernel version: Linux pj 5.0.0-20-generic #21-Ubuntu SMP Mon Jun 24 09:32:09 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux With this kernel version as well as linux-headers-5.0.0.20, linux- headers-5.0.0-20-generic, my realtek wireless card works fine. While booted into 5.0.0-20 kernel, here are the realtek kernel modules that are loaded: # lsmod | grep r8 r8822be 692224 0 mac80211 806912 1 r8822be cfg80211 671744 2 mac80211,r8822be r8169 81920 0 Hopefully this realtek wireless regression can get fixed in the next minor kernel version. Let me know if you need any more information. Best Regards, Jun To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1838133/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
