Dear You-Sheng Yang, I tried the 5.9.8-050908-generic kernel based on the description, but unfortunately the 5GHz connection still doesn't work. What might be a useful information that I got this message during kernel installation:
update-initramfs: Generating /boot/initrd.img-5.9.3-050903-generic W: Possible missing firmware /lib/firmware/i915/skl_huc_2.0.0.bin for module i915 W: Possible missing firmware /lib/firmware/i915/skl_guc_33.0.0.bin for module i915 W: Possible missing firmware /lib/firmware/i915/bxt_huc_2.0.0.bin for module i915 W: Possible missing firmware /lib/firmware/i915/bxt_guc_33.0.0.bin for module i915 W: Possible missing firmware /lib/firmware/i915/kbl_huc_4.0.0.bin for module i915 W: Possible missing firmware /lib/firmware/i915/kbl_guc_33.0.0.bin for module i915 W: Possible missing firmware /lib/firmware/i915/glk_huc_4.0.0.bin for module i915 W: Possible missing firmware /lib/firmware/i915/glk_guc_33.0.0.bin for module i915 W: Possible missing firmware /lib/firmware/i915/kbl_huc_4.0.0.bin for module i915 W: Possible missing firmware /lib/firmware/i915/kbl_guc_33.0.0.bin for module i915 W: Possible missing firmware /lib/firmware/i915/cml_huc_4.0.0.bin for module i915 W: Possible missing firmware /lib/firmware/i915/cml_guc_33.0.0.bin for module i915 W: Possible missing firmware /lib/firmware/i915/icl_huc_9.0.0.bin for module i915 W: Possible missing firmware /lib/firmware/i915/icl_guc_33.0.0.bin for module i915 W: Possible missing firmware /lib/firmware/i915/ehl_huc_9.0.0.bin for module i915 W: Possible missing firmware /lib/firmware/i915/ehl_guc_33.0.4.bin for module i915 W: Possible missing firmware /lib/firmware/i915/tgl_huc_7.0.12.bin for module i915 W: Possible missing firmware /lib/firmware/i915/tgl_guc_35.2.0.bin for module i915 W: Possible missing firmware /lib/firmware/i915/tgl_huc_7.0.12.bin for module i915 W: Possible missing firmware /lib/firmware/i915/tgl_guc_35.2.0.bin for module i915 W: Possible missing firmware /lib/firmware/i915/icl_dmc_ver1_09.bin for module i915 W: Possible missing firmware /lib/firmware/i915/tgl_dmc_ver2_06.bin for module i915 W: Possible missing firmware /lib/firmware/i915/rkl_dmc_ver2_01.bin for module i915 I: The initramfs will attempt to resume from /dev/dm-2 -- 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/1882136 Title: Intel Corporation Wireless 8265 / 8275 [8086:24fd] Subsystem [8086:0050] unable to connect to 5GHz wifi Status in linux package in Ubuntu: Incomplete Bug description: After updating the NetworkManager I can't connect to 5GHz wifi. The router is a mikrotik hap ac2.The notebook is a Dell Latitude 5580. ProblemType: Bug DistroRelease: Ubuntu 20.04 Package: network-manager 1.22.10-1ubuntu2.1 ProcVersionSignature: Ubuntu 5.4.0-33.37-generic 5.4.34 Uname: Linux 5.4.0-33-generic x86_64 ApportVersion: 2.20.11-0ubuntu27.2 Architecture: amd64 CasperMD5CheckResult: skip CurrentDesktop: ubuntu:GNOME Date: Thu Jun 4 22:20:15 2020 InstallationDate: Installed on 2020-05-15 (20 days ago) InstallationMedia: Ubuntu 20.04 LTS "Focal Fossa" - Release amd64 (20200423) ProcEnviron: PATH=(custom, no user) XDG_RUNTIME_DIR=<set> LANG=hu_HU.UTF-8 SHELL=/bin/bash SourcePackage: network-manager UpgradeStatus: No upgrade log present (probably fresh install) nmcli-nm: RUNNING VERSION STATE STARTUP CONNECTIVITY NETWORKING WIFI-HW WIFI WWAN-HW WWAN running 1.22.10 connected started full enabled enabled enabled enabled enabled --- ProblemType: Bug ApportVersion: 2.20.9-0ubuntu7.20 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: szili 1443 F.... pulseaudio CurrentDesktop: Pantheon DistroRelease: elementary OS 5.1.7 InstallationDate: Installed on 2020-11-17 (0 days ago) InstallationMedia: elementary OS 5.1 "hera" - stable amd64 (20200814) MachineType: Dell Inc. Latitude 5590 Package: linux (not installed) ProcFB: 0 i915drmfb ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-5.4.0-54-generic root=/dev/mapper/elementary--vg-root ro quiet splash vt.handoff=1 ProcVersionSignature: Ubuntu 5.4.0-54.60~18.04.1-generic 5.4.65 RelatedPackageVersions: linux-restricted-modules-5.4.0-54-generic N/A linux-backports-modules-5.4.0-54-generic N/A linux-firmware 1.173.19 Tags: hera Uname: Linux 5.4.0-54-generic x86_64 UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo _MarkForUpload: True dmi.bios.date: 07/15/2020 dmi.bios.vendor: Dell Inc. dmi.bios.version: 1.14.0 dmi.board.name: 0MM81M dmi.board.vendor: Dell Inc. dmi.board.version: A00 dmi.chassis.type: 10 dmi.chassis.vendor: Dell Inc. dmi.modalias: dmi:bvnDellInc.:bvr1.14.0:bd07/15/2020:svnDellInc.:pnLatitude5590:pvr:rvnDellInc.:rn0MM81M:rvrA00:cvnDellInc.:ct10:cvr: dmi.product.family: Latitude dmi.product.name: Latitude 5590 dmi.product.sku: 0817 dmi.sys.vendor: Dell Inc. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1882136/+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
