Public bug reported: My recent upgrade to Focal (20.04) using 5.4.0-28 version of the kernel kills wifi. Wifi was working properly under 19.10 (using 5.3.0-68). The issue persists using both rtw88 and rtwpci (which work under 19.10). 20.04 live CD has the same issue. I also tried installing 20.10 and found the same issue. On startup wireless works for a little while, allowing to see and connect to networks, but stops working shortly thereafter (mere seconds).
Further, just trying the 20.04 live CD appears to mess the wireless card when returning to 19.10 (which is installed on a proper drive in my laptop). Needed to reinstall the kernel (same version: 5.3.0-51-generic) in 19.10 to get it working again. I have no idea what this means. I have followed several of the suggestions in: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1838133 (which seems to be the same bug for a previous kernel version, so may be this is a reversion?), to no avail. 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 (as I said, 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. In order to post this I rolled back to 19.10, so I no longer have access to a machine experiencing this issue (and cannot post the logs), but can reboot on the live CD and obtain them if there is any useful debugging to be done. Thanks! ** Affects: linux (Ubuntu) Importance: Undecided Status: New -- 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/1901890 Title: realtek r8822be kernel module fails after update to linux kernel- headers 5.0.4-28 Status in linux package in Ubuntu: New Bug description: My recent upgrade to Focal (20.04) using 5.4.0-28 version of the kernel kills wifi. Wifi was working properly under 19.10 (using 5.3.0-68). The issue persists using both rtw88 and rtwpci (which work under 19.10). 20.04 live CD has the same issue. I also tried installing 20.10 and found the same issue. On startup wireless works for a little while, allowing to see and connect to networks, but stops working shortly thereafter (mere seconds). Further, just trying the 20.04 live CD appears to mess the wireless card when returning to 19.10 (which is installed on a proper drive in my laptop). Needed to reinstall the kernel (same version: 5.3.0-51-generic) in 19.10 to get it working again. I have no idea what this means. I have followed several of the suggestions in: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1838133 (which seems to be the same bug for a previous kernel version, so may be this is a reversion?), to no avail. 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 (as I said, 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. In order to post this I rolled back to 19.10, so I no longer have access to a machine experiencing this issue (and cannot post the logs), but can reboot on the live CD and obtain them if there is any useful debugging to be done. Thanks! To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1901890/+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
