Kernel 6.17, no improvement: - no 6GHz visible with firmware 20250825215925 - unstable 6GHz on WiFi 6E AP with 20250526153203
-- 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/2118755 Title: mt7925e driver is unstable on 6GHz network Status in linux package in Ubuntu: Triaged Bug description: UniFi APs setup at home, with WiFi 6E AP right above the laptop and WiFi7 in another room. Previous laptop was ThinkPad P14s Gen2 with an Intel AX210 swap and was 100% solid. Migrated (copied disks) the system to a new ThinkPad P14s Gen6 AMD that comes with a MediaTek chip, reporting as "c2:00.0 Network controller: MEDIATEK Corp. Device 7925", with the mt7925e driver taking care. Using 25.04: - the latest stable kernel was delivering poor wifi performances, barely 200Mbits, and IPv6 was broken - using plucky-proposed kernel (6.14.0-26-generic), wifi performances improved (800Mbits over 5GHz/80MHz) and IPv6 was fixed - 6GHz was not visible, "iw reg get" would report FR but cfg80211 would report WORLD - forcing modprobe with "options cfg80211 ieee80211_regdom=FR" I get 6Ghz working, and decent speed (1.25Gbits up / 1.5 Gbits down) with iperf3 However on a regular basis (10-15 min, sometime less) WiFi link is lost for one second and dmesg reflects: juil. 25 09:50:59 portable-alex kernel: wlp194s0: Connection to AP 62:22:32:6e:xx:xx lost juil. 25 09:51:00 portable-alex wpa_supplicant[2781]: wlp194s0: CTRL-EVENT-DISCONNECTED bssid=62:22:32:6e:06:9a reason=4 locally_generated=1 juil. 25 09:51:00 portable-alex wpa_supplicant[2781]: wlp194s0: CTRL-EVENT-REGDOM-CHANGE init=CORE type=WORLD juil. 25 09:51:00 portable-alex wpa_supplicant[2781]: wlp194s0: CTRL-EVENT-REGDOM-CHANGE init=USER type=COUNTRY alpha2=FR juil. 25 09:51:00 portable-alex NetworkManager[2776]: <info> [1753429860.3779] device (wlp194s0): supplicant interface state: completed -> disconnected juil. 25 09:51:00 portable-alex NetworkManager[2776]: <info> [1753429860.3779] device (p2p-dev-wlp194s0): supplicant management interface state: completed -> disconnected From there it disconnects from the 6Ghz frequency, and quickly recovers to a 5.2GHz and then a few minutes laters, it goes back to the 6GHz frequency: juil. 25 09:56:01 portable-alex wpa_supplicant[2781]: wlp194s0: Reject scan trigger since one is already pending juil. 25 09:56:10 portable-alex wpa_supplicant[2781]: wlp194s0: SME: Trying to authenticate with 62:22:32:6e:06:9a (SSID='Livebox-XX' freq=6135 MHz) juil. 25 09:56:11 portable-alex kernel: wlp194s0: disconnect from AP 94:2a:6f:b0:xx:xx for new auth to 62:22:32:6e:06:9a juil. 25 09:56:11 portable-alex kernel: wlp194s0: authenticate with 62:22:32:6e:xx:xx (local address=84:9e:56:e3:c6:27) juil. 25 09:56:11 portable-alex kernel: wlp194s0: send auth to 62:22:32:6e:xx:xx (try 1/3) juil. 25 09:56:11 portable-alex NetworkManager[2776]: <info> [1753430171.2712] device (wlp194s0): supplicant interface state: completed -> authenticating juil. 25 09:56:11 portable-alex NetworkManager[2776]: <info> [1753430171.2712] device (p2p-dev-wlp194s0): supplicant management interface state: completed -> authenticating juil. 25 09:56:11 portable-alex wpa_supplicant[2781]: wlp194s0: CTRL-EVENT-REGDOM-CHANGE init=CORE type=WORLD juil. 25 09:56:11 portable-alex wpa_supplicant[2781]: wlp194s0: CTRL-EVENT-REGDOM-CHANGE init=USER type=COUNTRY alpha2=FR juil. 25 09:56:11 portable-alex wpa_supplicant[2781]: wlp194s0: Trying to associate with 62:22:32:6e:xx:xx (SSID='Livebox-XX' freq=6135 MHz) I am not sure if the "CTRL-EVENT-REGDOM-CHANGE" messages are a symptom of why it looses the link, or a consequence. This is resulting in a not so good experience, with the network being fast enough and then suddenly slow a bit then goes back better. ProblemType: Bug DistroRelease: Ubuntu 25.04 Package: linux-image-6.14.0-28-generic 6.14.0-28.28 ProcVersionSignature: Ubuntu 6.14.0-28.28-generic 6.14.8 Uname: Linux 6.14.0-28-generic x86_64 ApportVersion: 2.32.0-0ubuntu5.3 Architecture: amd64 CasperMD5CheckResult: pass CurrentDesktop: ubuntu:GNOME Date: Fri Jul 25 09:56:10 2025 HibernationDevice: RESUME=/dev/mapper/vg--ubuntu-lv--ubuntu--swap InstallationDate: Installed on 2022-07-04 (1117 days ago) InstallationMedia: Ubuntu 22.04 LTS "Jammy Jellyfish" - Release amd64 (20220419) MachineType: LENOVO 21RVCTO1WW ProcEnviron: LANG=fr_FR.UTF-8 PATH=(custom, no user) SHELL=/bin/bash TERM=xterm-256color ProcFB: 0 amdgpudrmfb ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-6.14.0-28-generic root=/dev/mapper/vg--ubuntu-lv--ubuntu--root ro rootflags=subvol=@ quiet splash resume=/dev/mapper/vg--ubuntu-lv--ubuntu--swap crashkernel=2G-4G:320M,4G-32G:512M,32G-64G:1024M,64G-128G:2048M,128G-:4096M vt.handoff=7 RelatedPackageVersions: linux-restricted-modules-6.14.0-28-generic N/A linux-backports-modules-6.14.0-28-generic N/A linux-firmware 20250317.git1d4c88ee-0ubuntu1.3 SourcePackage: linux UpgradeStatus: Upgraded to plucky on 2025-03-28 (119 days ago) dmi.bios.date: 06/03/2025 dmi.bios.release: 1.13 dmi.bios.vendor: LENOVO dmi.bios.version: R2XET33W (1.13 ) dmi.board.asset.tag: Not Available dmi.board.name: 21RVCTO1WW dmi.board.vendor: LENOVO dmi.board.version: Not Defined dmi.chassis.asset.tag: No Asset Tag dmi.chassis.type: 10 dmi.chassis.vendor: LENOVO dmi.chassis.version: None dmi.ec.firmware.release: 1.7 dmi.modalias: dmi:bvnLENOVO:bvrR2XET33W(1.13):bd06/03/2025:br1.13:efr1.7:svnLENOVO:pn21RVCTO1WW:pvrThinkPadP14sGen6AMD:rvnLENOVO:rn21RVCTO1WW:rvrNotDefined:cvnLENOVO:ct10:cvrNone:skuLENOVO_MT_21RV_BU_Think_FM_ThinkPadP14sGen6AMD: dmi.product.family: ThinkPad P14s Gen 6 AMD dmi.product.name: 21RVCTO1WW dmi.product.sku: LENOVO_MT_21RV_BU_Think_FM_ThinkPad P14s Gen 6 AMD dmi.product.version: ThinkPad P14s Gen 6 AMD dmi.sys.vendor: LENOVO To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2118755/+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
