Public bug reported: When the system was upgraded to Ubuntu version 20.04, WiFi stopped working. It does not recognize any network, or it does recognize it when the computer is turned on but soon after it stops recognizing it and the connection is lost, so there is no other option but to use the Internet connected with an Ethernet cable.
The solution I found to this problem is to select from grub the Kernel versions that did not have this problem (5.3). That worked fine so far, but yesterday the kernel was updated again, and the system removed the 5.3 kernel working versions, so I can no longer select them from grub. It only left several versions 5.4.0, which all have this same problem I downloaded the packages of various kernel 5.3.0 versions (headers, modules and image) from https://packages.ubuntu.com/, and I can get them up fine from grub, but when I do this, for some reason the computer works very badly (the screens take time to load, the mouse moves slowly, the machine works slowly, not all the menu options appear, etc) diego@infra-ThinkPad-E490:~$ lsb_release -rd Description: Ubuntu 20.04.1 LTS Release: 20.04 diego@infra-ThinkPad-E490:~$ apt-cache policy pkgname N: Unable to locate package pkgname #Computer specs: infra-thinkpad-e490 description: Computer width: 64 bits capabilities: smp vsyscall32 *-core description: Motherboard physical id: 0 *-memory description: System memory physical id: 0 size: 15GiB *-cpu product: Intel(R) Core(TM) i7-8565U CPU @ 1.80GHz vendor: Intel Corp. physical id: 1 bus info: cpu@0 size: 3855MHz capacity: 4600MHz width: 64 bits *-network description: Ethernet interface product: RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller vendor: Realtek Semiconductor Co., Ltd. physical id: 0 bus info: pci@0000:04:00.0 logical name: enp4s0 version: 10 serial: e8:6a:64:e7:ea:91 capacity: 1Gbit/s width: 64 bits clock: 33MHz capabilities: bus_master cap_list ethernet physical tp 10bt 10bt-fd 100bt 100bt-fd 1000bt-fd autonegotiation configuration: autonegotiation=on broadcast=yes driver=r8168 driverversion=8.048.00-NAPI latency=0 link=no multicast=yes port=twisted pair resources: irq:125 ioport:3000(size=256) memory:a1304000-a1304fff memory:a1300000-a1303fff *-generic description: Wireless interface product: RTL8822BE 802.11a/b/g/n/ac WiFi adapter vendor: Realtek Semiconductor Co., Ltd. physical id: 0 bus info: pci@0000:05:00.0 logical name: wlp5s0 version: ff serial: f8:a2:d6:f2:20:f9 width: 32 bits clock: 66MHz capabilities: bus_master vga_palette cap_list ethernet physical wireless configuration: broadcast=yes driver=rtw_pci driverversion=5.4.0-47-generic firmware=N/A latency=255 link=no maxlatency=255 mingnt=255 multicast=yes wireless=IEEE 802.11 resources: irq:138 ioport:2000(size=256) memory:a1200000-a120ffff ProblemType: Bug DistroRelease: Ubuntu 20.04 Package: ubuntu-release-upgrader-core 1:20.04.25 ProcVersionSignature: Ubuntu 5.4.0-47.51-generic 5.4.55 Uname: Linux 5.4.0-47-generic x86_64 ApportVersion: 2.20.11-0ubuntu27.8 Architecture: amd64 CasperMD5CheckResult: skip CrashDB: ubuntu CurrentDesktop: ubuntu:GNOME Date: Sun Sep 13 20:29:04 2020 PackageArchitecture: all SourcePackage: ubuntu-release-upgrader Symptom: release-upgrade UpgradeStatus: Upgraded to focal on 2020-08-12 (32 days ago) VarLogDistupgradeApttermlog: Error: [Errno 13] Permission denied: '/var/log/dist-upgrade/apt-term.log' VarLogDistupgradeTermlog: ** Affects: ubuntu Importance: Undecided Status: New ** Tags: amd64 apport-bug dist-upgrade focal wifi -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1895482 Title: new update of Ubuntu Focal Fossa does not recognize any Wifi network To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+bug/1895482/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
