I updated to OpenWrt SNAPSHOT r17517-46dec9952b and have lost the 5ghz radio. Only the 2.4 radio is working. 
Yeah, you need to clone the OpenWrt repo and revert before this commit:
Then compile the images.
Are you on the UBI version? If so first you need to flash the latest UBI installer which is 0.5.3 and then upgrade to latest snapshots.
I'm on OpenWrt SNAPSHOT r17502-0470159552 for Linksys E8450 UBI and both radios are working.
I am on ubi. I guess I need to see how to upgrade the ubi installer.
Force flash the ubi recovery installer, just like how you flashed the first time.
Should I unclick keep settings keep current configuration? I have made an archive.
You should
- unclick the "keep settings" and flash the UBI recovery installer,
- use that to flash the normal sysupgrade, and
- then restore settings from archive.
Thanks! I'm back now and I have both radios. 
2 Likes
yes i confirm than whilde have flash 0.5.3
the wireless work very well chanel to my coutry turn on for my example france
2.4 operating frquency N auto and 40mhz
5ghz operating frequency AX and 160 mhz
2 Likes
I am running Snapshot r17488-64be0eadc1, but I am still having issues with AP. It crashes and goes back to recovery and I think it's because of the number of hosts connecting 5Ghz network. Is there any hosts limit for 5Ghz network? Below is the RAMOOPS output from pstore.
root@OpenWrt:~# cat /sys/fs/pstore/dmesg-ramoops-0
Oops#1 Part1
<5>[ 7.288211] UBIFS (ubi0:5): background thread "ubifs_bgt0_5" started, PID 891
<5>[ 7.329081] UBIFS (ubi0:5): UBIFS: mounted UBI device 0, volume 5, name "rootfs_data"
<5>[ 7.336934] UBIFS (ubi0:5): LEB size: 126976 bytes (124 KiB), min./max. I/O unit sizes: 2048 bytes/2048
bytes
<5>[ 7.346849] UBIFS (ubi0:5): FS size: 91295744 bytes (87 MiB, 719 LEBs), journal size 4571136 bytes (4 Mi
B, 36 LEBs)
<5>[ 7.357278] UBIFS (ubi0:5): reserved for root: 4312123 bytes (4211 KiB)
<5>[ 7.363884] UBIFS (ubi0:5): media format: w5/r0 (latest is w5/r0), UUID 9E6132D4-888A-4965-8CD6-68069C90
F561, small LPT model
<14>[ 7.486558] block: attempting to load /tmp/ubifs_cfg/upper/etc/config/fstab
<14>[ 7.495886] block: extroot: not configured
<14>[ 7.501180] mount_root: switching to ubifs overlay
<6>[ 7.508834] overlayfs: "xino" feature enabled using 2 upper inode bits.
<15>[ 7.518093] urandom-seed: Seeding with /etc/urandom.seed
<6>[ 7.559144] mt7530 mdio-bus:00 lan1: Link is Down
<14>[ 7.568239] procd: - early -
<14>[ 7.571156] procd: - watchdog -
<14>[ 8.112322] procd: - watchdog -
<14>[ 8.117365] procd: - ubus -
<14>[ 8.171410] procd: - init -
<14>[ 8.440991] urngd: v1.0.2 started.
<14>[ 8.461766] kmodloader: loading kernel modules from /etc/modules.d/*
<6>[ 8.496510] Loading modules backported from Linux version v5.10.42-0-g65859eca4dff
<6>[ 8.504086] Backport generated by backports.git v5.10.42-1-0-gbee5c545
<6>[ 8.523934] xt_time: kernel timezone is -0000
<7>[ 8.576698] ieee80211 phy0: Selected rate control algorithm 'minstrel_ht'
<7>[ 8.587381] mt7915e 0000:01:00.0: assign IRQ: got 143
<7>[ 8.592531] pci 0000:00:00.0: enabling bus mastering
<6>[ 8.597569] mt7915e 0000:01:00.0: enabling device (0000 -> 0002)
<7>[ 8.603652] mt7915e 0000:01:00.0: enabling bus mastering
<6>[ 8.636934] mt7622-wmac 18000000.wmac: HW/SW Version: 0x8a108a10, Build Time: 20190801210006a
<6>[ 8.636934]
<6>[ 8.665935] mt7915e 0000:01:00.0: HW/SW Version: 0x8a108a10, Build Time: 20201105222230a
<6>[ 8.665935]
<6>[ 8.725823] mt7622-wmac 18000000.wmac: N9 Firmware Version: 2.0, Build Time: 20200131180931
<6>[ 8.790787] mt7915e 0000:01:00.0: WM Firmware Version: ____000000, Build Time: 20201105222304
<6>[ 8.815188] mt7915e 0000:01:00.0: WA Firmware Version: DEV_000000, Build Time: 20201105222323
<6>[ 8.938015] PPP generic driver version 2.4.2
<6>[ 8.943474] NET: Registered protocol family 24
<14>[ 8.954752] kmodloader: done loading kernel modules from /etc/modules.d/*
<6>[ 11.418635] mtk_soc_eth 1b100000.ethernet eth0: Link is Down
<6>[ 11.432605] mtk_soc_eth 1b100000.ethernet eth0: configuring for fixed/2500base-x link mode
<6>[ 11.440976] mtk_soc_eth 1b100000.ethernet eth0: Link is Up - 2.5Gbps/Full - flow control rx/tx
<6>[ 11.451478] IPv6: ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready
<6>[ 11.475915] mt7530 mdio-bus:00 lan1: configuring for phy/gmii link mode
<6>[ 11.487526] 8021q: adding VLAN 0 to HW filter on device lan1
<6>[ 11.499479] br-lan: port 1(lan1) entered blocking state
<6>[ 11.504734] br-lan: port 1(lan1) entered disabled state
<6>[ 11.515628] device lan1 entered promiscuous mode
<6>[ 11.520285] device eth0 entered promiscuous mode
<6>[ 11.568995] mt7530 mdio-bus:00 lan2: configuring for phy/gmii link mode
<6>[ 11.588526] 8021q: adding VLAN 0 to HW filter on device lan2
<6>[ 11.600129] br-lan: port 2(lan2) entered blocking state
<6>[ 11.605420] br-lan: port 2(lan2) entered disabled state
<6>[ 11.613736] device lan2 entered promiscuous mode
<6>[ 11.644252] mt7530 mdio-bus:00 lan3: configuring for phy/gmii link mode
<6>[ 11.655216] 8021q: adding VLAN 0 to HW filter on device lan3
<6>[ 11.664728] br-lan: port 3(lan3) entered blocking state
<6>[ 11.670052] br-lan: port 3(lan3) entered disabled state
<6>[ 11.690722] device lan3 entered promiscuous mode
<6>[ 11.711764] mt7530 mdio-bus:00 lan4: configuring for phy/gmii link mode
<6>[ 11.721751] 8021q: adding VLAN 0 to HW filter on device lan4
<6>[ 11.734938] br-lan: port 4(lan4) entered blocking state
<6>[ 11.740290] br-lan: port 4(lan4) entered disabled state
<6>[ 11.751663] device lan4 entered promiscuous mode
<6>[ 11.770660] mt7530 mdio-bus:00 wan: configuring for phy/gmii link mode
<6>[ 11.779200] 8021q: adding VLAN 0 to HW filter on device wan
<6>[ 14.608454] mt7530 mdio-bus:00 lan1: Link is Up - 1Gbps/Full - flow control off
<6>[ 14.691475] br-lan: port 5(wlan1) entered blocking state
<6>[ 14.696847] br-lan: port 5(wlan1) entered disabled state
<6>[ 14.702373] device wlan1 entered promiscuous mode
<6>[ 14.707242] br-lan: port 5(wlan1) entered blocking state
<6>[ 14.712554] br-lan: port 5(wlan1) entered forwarding state
<6>[ 14.718753] br-lan: port 5(wlan1) entered disabled state
<6>[ 14.724265] br-lan: port 1(lan1) entered blocking state
<6>[ 14.729563] br-lan: port 1(lan1) entered forwarding state
<6>[ 14.735203] IPv6: ADDRCONF(NETDEV_CHANGE): br-lan: link becomes ready
<6>[ 14.976353] br-lan: port 6(wlan0) entered blocking state
<6>[ 14.981673] br-lan: port 6(wlan0) entered disabled state
<6>[ 14.987237] device wlan0 entered promiscuous mode
<6>[ 14.992091] br-lan: port 6(wlan0) entered blocking state
<6>[ 14.997478] br-lan: port 6(wlan0) entered forwarding state
<6>[ 15.725180] br-lan: port 6(wlan0) entered disabled state
<6>[ 22.849093] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready
<6>[ 22.855606] br-lan: port 6(wlan0) entered blocking state
<6>[ 22.860914] br-lan: port 6(wlan0) entered forwarding state
<6>[ 34.172362] IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready
<6>[ 34.178859] br-lan: port 5(wlan1) entered blocking state
<6>[ 34.184168] br-lan: port 5(wlan1) entered forwarding state
<1>[191588.152020] Unable to handle kernel NULL pointer dereference at virtual address 0000000000000053
<1>[191588.160912] Mem abort info:
<1>[191588.163799] ESR = 0x96000005
<1>[191588.166932] EC = 0x25: DABT (current EL), IL = 32 bits
<1>[191588.172320] SET = 0, FnV = 0
<1>[191588.175461] EA = 0, S1PTW = 0
<1>[191588.178679] Data abort info:
<1>[191588.181636] ISV = 0, ISS = 0x00000005
<1>[191588.185591] CM = 0, WnR = 0
<1>[191588.188667] user pgtable: 4k pages, 39-bit VAs, pgdp=0000000042a99000
<1>[191588.195194] [0000000000000053] pgd=0000000000000000, p4d=0000000000000000, pud=0000000000000000
<0>[191588.204046] Internal error: Oops: 96000005 [#1] SMP
<7>[191588.209032] Modules linked in: pppoe ppp_async iptable_nat xt_state xt_nat xt_conntrack xt_REDIRECT xt_
MASQUERADE xt_FLOWOFFLOAD xt_CT pppox ppp_generic nf_nat nf_flow_table nf_conntrack mt7915e mt7615e mt7615_com
mon mt76_connac_lib mt76 mac80211 ipt_REJECT cfg80211 xt_time xt_tcpudp xt_multiport xt_mark xt_mac xt_limit x
t_comment xt_TCPMSS xt_LOG slhc nf_reject_ipv4 nf_log_ipv4 nf_defrag_ipv6 nf_defrag_ipv4 ipvlan iptable_mangle
iptable_filter ip_tables hwmon crc_ccitt compat nf_log_ipv6 nf_log_common ip6table_mangle ip6table_filter ip6
_tables ip6t_REJECT x_tables nf_reject_ipv6 vfat fat autofs4 nls_utf8 nls_iso8859_1 nls_cp437 seqiv uas usb_st
orage leds_gpio xhci_plat_hcd gpio_button_hotplug
<7>[191588.270620] CPU: 0 PID: 1150 Comm: napi/phy1-9 Tainted: G S 5.10.61 #0
<7>[191588.278525] Hardware name: Linksys E8450 (UBI) (DT)
<7>[191588.283482] pstate: 60000005 (nZCv daif -PAN -UAO -TCO BTYPE=--)
<7>[191588.289575] pc : mt76_tx_status_skb_done+0x0/0x80 [mt76]
<7>[191588.294968] lr : mt7915_queue_rx_skb+0xa04/0x154c [mt7915e]
<7>[191588.300616] sp : ffffffc010e2bc20
<7>[191588.304007] x29: ffffffc010e2bc20 x28: ffffff8002235e00
<7>[191588.309399] x27: 0000000040000000 x26: ffffff80022338d0
<7>[191588.314789] x25: ffffff8002235ec0 x24: ffffff8003623048
<7>[191588.320180] x23: 0000000000000000 x22: 0000000000000017
<7>[191588.325570] x21: ffffff8001836bb8 x20: ffffff8003623028
<7>[191588.330960] x19: ffffff8002232800 x18: ffffffc010ea2aa0
<7>[191588.336351] x17: 00000000ffffffff x16: 0000000000000000
<7>[191588.341741] x15: 0000000000000004 x14: ffffff8002234918
<7>[191588.347131] x13: 0000000000000000 x12: 0000000000000006
<7>[191588.352521] x11: ffffff8002234800 x10: ffffffc010a96000
<7>[191588.357911] x9 : 0000000000000064 x8 : ffffff8002232800
<7>[191588.363302] x7 : ffffff8002234950 x6 : 000000010123e297
<7>[191588.368692] x5 : fffffffefedc1db5 x4 : ffffff8001a73b00
<7>[191588.374082] x3 : ffffffc010e2bd18 x2 : ffffffc010e2bd18
<7>[191588.379473] x1 : 0000000000000000 x0 : ffffff8002232800
<7>[191588.384864] Call trace:
<7>[191588.387391] mt76_tx_status_skb_done+0x0/0x80 [mt76]
<7>[191588.392435] mt76_dma_rx_poll+0x284/0xb70 [mt76]
<7>[191588.397134] __napi_poll+0x34/0x140
<7>[191588.400700] napi_threaded_poll+0x84/0xf0
<7>[191588.404792] kthread+0x120/0x124
<7>[191588.408099] ret_from_fork+0x10/0x18
<0>[191588.411756] Code: 54fffa41 d2800000 d65f03c0 d503201f (39414c24)
<4>[191588.417927] ---[ end trace cb9f8d28f15a7f05 ]---
root@OpenWrt:~#
root@OpenWrt:~# cat /sys/fs/pstore/dmesg-ramoops-1
Panic#2 Part1
<5>[ 7.346849] UBIFS (ubi0:5): FS size: 91295744 bytes (87 MiB, 719 LEBs), journal size 4571136 bytes (4 MiB, 36 LEBs)
<5>[ 7.357278] UBIFS (ubi0:5): reserved for root: 4312123 bytes (4211 KiB)
<5>[ 7.363884] UBIFS (ubi0:5): media format: w5/r0 (latest is w5/r0), UUID 9E6132D4-888A-4965-8CD6-68069C90F561, small LPT model
<14>[ 7.486558] block: attempting to load /tmp/ubifs_cfg/upper/etc/config/fstab
<14>[ 7.495886] block: extroot: not configured
<14>[ 7.501180] mount_root: switching to ubifs overlay
<6>[ 7.508834] overlayfs: "xino" feature enabled using 2 upper inode bits.
<15>[ 7.518093] urandom-seed: Seeding with /etc/urandom.seed
<6>[ 7.559144] mt7530 mdio-bus:00 lan1: Link is Down
<14>[ 7.568239] procd: - early -
<14>[ 7.571156] procd: - watchdog -
<14>[ 8.112322] procd: - watchdog -
<14>[ 8.117365] procd: - ubus -
<14>[ 8.171410] procd: - init -
<14>[ 8.440991] urngd: v1.0.2 started.
<14>[ 8.461766] kmodloader: loading kernel modules from /etc/modules.d/*
<6>[ 8.496510] Loading modules backported from Linux version v5.10.42-0-g65859eca4dff
<6>[ 8.504086] Backport generated by backports.git v5.10.42-1-0-gbee5c545
<6>[ 8.523934] xt_time: kernel timezone is -0000
<7>[ 8.576698] ieee80211 phy0: Selected rate control algorithm 'minstrel_ht'
<7>[ 8.587381] mt7915e 0000:01:00.0: assign IRQ: got 143
<7>[ 8.592531] pci 0000:00:00.0: enabling bus mastering
<6>[ 8.597569] mt7915e 0000:01:00.0: enabling device (0000 -> 0002)
<7>[ 8.603652] mt7915e 0000:01:00.0: enabling bus mastering
<6>[ 8.636934] mt7622-wmac 18000000.wmac: HW/SW Version: 0x8a108a10, Build Time: 20190801210006a
<6>[ 8.636934]
<6>[ 8.665935] mt7915e 0000:01:00.0: HW/SW Version: 0x8a108a10, Build Time: 20201105222230a
<6>[ 8.665935]
<6>[ 8.725823] mt7622-wmac 18000000.wmac: N9 Firmware Version: 2.0, Build Time: 20200131180931
<6>[ 8.790787] mt7915e 0000:01:00.0: WM Firmware Version: ____000000, Build Time: 20201105222304
<6>[ 8.815188] mt7915e 0000:01:00.0: WA Firmware Version: DEV_000000, Build Time: 20201105222323
<6>[ 8.938015] PPP generic driver version 2.4.2
<6>[ 8.943474] NET: Registered protocol family 24
<14>[ 8.954752] kmodloader: done loading kernel modules from /etc/modules.d/*
<6>[ 11.418635] mtk_soc_eth 1b100000.ethernet eth0: Link is Down
<6>[ 11.432605] mtk_soc_eth 1b100000.ethernet eth0: configuring for fixed/2500base-x link mode
<6>[ 11.440976] mtk_soc_eth 1b100000.ethernet eth0: Link is Up - 2.5Gbps/Full - flow control rx/tx
<6>[ 11.451478] IPv6: ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready
<6>[ 11.475915] mt7530 mdio-bus:00 lan1: configuring for phy/gmii link mode
<6>[ 11.487526] 8021q: adding VLAN 0 to HW filter on device lan1
<6>[ 11.499479] br-lan: port 1(lan1) entered blocking state
<6>[ 11.504734] br-lan: port 1(lan1) entered disabled state
<6>[ 11.515628] device lan1 entered promiscuous mode
<6>[ 11.520285] device eth0 entered promiscuous mode
<6>[ 11.568995] mt7530 mdio-bus:00 lan2: configuring for phy/gmii link mode
<6>[ 11.588526] 8021q: adding VLAN 0 to HW filter on device lan2
<6>[ 11.600129] br-lan: port 2(lan2) entered blocking state
<6>[ 11.605420] br-lan: port 2(lan2) entered disabled state
<6>[ 11.613736] device lan2 entered promiscuous mode
<6>[ 11.644252] mt7530 mdio-bus:00 lan3: configuring for phy/gmii link mode
<6>[ 11.655216] 8021q: adding VLAN 0 to HW filter on device lan3
<6>[ 11.664728] br-lan: port 3(lan3) entered blocking state
<6>[ 11.670052] br-lan: port 3(lan3) entered disabled state
<6>[ 11.690722] device lan3 entered promiscuous mode
<6>[ 11.711764] mt7530 mdio-bus:00 lan4: configuring for phy/gmii link mode
<6>[ 11.721751] 8021q: adding VLAN 0 to HW filter on device lan4
<6>[ 11.734938] br-lan: port 4(lan4) entered blocking state
<6>[ 11.740290] br-lan: port 4(lan4) entered disabled state
<6>[ 11.751663] device lan4 entered promiscuous mode
<6>[ 11.770660] mt7530 mdio-bus:00 wan: configuring for phy/gmii link mode
<6>[ 11.779200] 8021q: adding VLAN 0 to HW filter on device wan
<6>[ 14.608454] mt7530 mdio-bus:00 lan1: Link is Up - 1Gbps/Full - flow control off
<6>[ 14.691475] br-lan: port 5(wlan1) entered blocking state
<6>[ 14.696847] br-lan: port 5(wlan1) entered disabled state
<6>[ 14.702373] device wlan1 entered promiscuous mode
<6>[ 14.707242] br-lan: port 5(wlan1) entered blocking state
<6>[ 14.712554] br-lan: port 5(wlan1) entered forwarding state
<6>[ 14.718753] br-lan: port 5(wlan1) entered disabled state
<6>[ 14.724265] br-lan: port 1(lan1) entered blocking state
<6>[ 14.729563] br-lan: port 1(lan1) entered forwarding state
<6>[ 14.735203] IPv6: ADDRCONF(NETDEV_CHANGE): br-lan: link becomes ready
<6>[ 14.976353] br-lan: port 6(wlan0) entered blocking state
<6>[ 14.981673] br-lan: port 6(wlan0) entered disabled state
<6>[ 14.987237] device wlan0 entered promiscuous mode
<6>[ 14.992091] br-lan: port 6(wlan0) entered blocking state
<6>[ 14.997478] br-lan: port 6(wlan0) entered forwarding state
<6>[ 15.725180] br-lan: port 6(wlan0) entered disabled state
<6>[ 22.849093] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready
<6>[ 22.855606] br-lan: port 6(wlan0) entered blocking state
<6>[ 22.860914] br-lan: port 6(wlan0) entered forwarding state
<6>[ 34.172362] IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready
<6>[ 34.178859] br-lan: port 5(wlan1) entered blocking state
<6>[ 34.184168] br-lan: port 5(wlan1) entered forwarding state
<1>[191588.152020] Unable to handle kernel NULL pointer dereference at virtual address 0000000000000053
<1>[191588.160912] Mem abort info:
<1>[191588.163799] ESR = 0x96000005
<1>[191588.166932] EC = 0x25: DABT (current EL), IL = 32 bits
<1>[191588.172320] SET = 0, FnV = 0
<1>[191588.175461] EA = 0, S1PTW = 0
<1>[191588.178679] Data abort info:
<1>[191588.181636] ISV = 0, ISS = 0x00000005
<1>[191588.185591] CM = 0, WnR = 0
<1>[191588.188667] user pgtable: 4k pages, 39-bit VAs, pgdp=0000000042a99000
<1>[191588.195194] [0000000000000053] pgd=0000000000000000, p4d=0000000000000000, pud=0000000000000000
<0>[191588.204046] Internal error: Oops: 96000005 [#1] SMP
<7>[191588.209032] Modules linked in: pppoe ppp_async iptable_nat xt_state xt_nat xt_conntrack xt_REDIRECT xt_MASQUERADE xt_FLOWOFFLOAD xt_CT pppox ppp_generic nf_nat nf_flow_table nf_conntrack mt7915e mt7615e mt7615_common
mt76_connac_lib mt76 mac80211 ipt_REJECT cfg80211 xt_time xt_tcpudp xt_multiport xt_mark xt_mac xt_limit xt_comment xt_TCPMSS xt_LOG slhc nf_reject_ipv4 nf_log_ipv4 nf_defrag_ipv6 nf_defrag_ipv4 ipvlan iptable_mangle iptable_filter
ip_tables hwmon crc_ccitt compat nf_log_ipv6 nf_log_common ip6table_mangle ip6table_filter ip6_tables ip6t_REJECT x_tables nf_reject_ipv6 vfat fat autofs4 nls_utf8 nls_iso8859_1 nls_cp437 seqiv uas usb_storage leds_gpio xhci_plat_hcd
gpio_button_hotplug
<7>[191588.270620] CPU: 0 PID: 1150 Comm: napi/phy1-9 Tainted: G S 5.10.61 #0
<7>[191588.278525] Hardware name: Linksys E8450 (UBI) (DT)
<7>[191588.283482] pstate: 60000005 (nZCv daif -PAN -UAO -TCO BTYPE=--)
<7>[191588.289575] pc : mt76_tx_status_skb_done+0x0/0x80 [mt76]
<7>[191588.294968] lr : mt7915_queue_rx_skb+0xa04/0x154c [mt7915e]
<7>[191588.300616] sp : ffffffc010e2bc20
<7>[191588.304007] x29: ffffffc010e2bc20 x28: ffffff8002235e00
<7>[191588.309399] x27: 0000000040000000 x26: ffffff80022338d0
<7>[191588.314789] x25: ffffff8002235ec0 x24: ffffff8003623048
<7>[191588.320180] x23: 0000000000000000 x22: 0000000000000017
<7>[191588.325570] x21: ffffff8001836bb8 x20: ffffff8003623028
<7>[191588.330960] x19: ffffff8002232800 x18: ffffffc010ea2aa0
<7>[191588.336351] x17: 00000000ffffffff x16: 0000000000000000
<7>[191588.341741] x15: 0000000000000004 x14: ffffff8002234918
<7>[191588.347131] x13: 0000000000000000 x12: 0000000000000006
<7>[191588.352521] x11: ffffff8002234800 x10: ffffffc010a96000
<7>[191588.357911] x9 : 0000000000000064 x8 : ffffff8002232800
<7>[191588.363302] x7 : ffffff8002234950 x6 : 000000010123e297
<7>[191588.368692] x5 : fffffffefedc1db5 x4 : ffffff8001a73b00
<7>[191588.374082] x3 : ffffffc010e2bd18 x2 : ffffffc010e2bd18
<7>[191588.379473] x1 : 0000000000000000 x0 : ffffff8002232800
<7>[191588.384864] Call trace:
<7>[191588.387391] mt76_tx_status_skb_done+0x0/0x80 [mt76]
<7>[191588.392435] mt76_dma_rx_poll+0x284/0xb70 [mt76]
<7>[191588.397134] __napi_poll+0x34/0x140
<7>[191588.400700] napi_threaded_poll+0x84/0xf0
<7>[191588.404792] kthread+0x120/0x124
<7>[191588.408099] ret_from_fork+0x10/0x18
<0>[191588.411756] Code: 54fffa41 d2800000 d65f03c0 d503201f (39414c24)
<4>[191588.417927] ---[ end trace cb9f8d28f15a7f05 ]---
<0>[191588.428717] Kernel panic - not syncing: Oops: Fatal exception in interrupt
<2>[191588.435673] SMP: stopping secondary CPUs
<0>[191588.439676] Kernel Offset: disabled
<0>[191588.443242] CPU features: 0x0000002,04002004
<0>[191588.447587] Memory Limit: none
root@OpenWrt:~#
Seeing anything here?
3 Likes
You won't see much improvement on single device throughput via WiFi6. What you'll see rather is that if you let, say, 5x WiFi5 devices do iperf3 tests simultaneously vs. 5x WiFi6 devices, the throughput will be much more stable (and higher, per device!) in the latter case.
Besides, for most wireless devices, even 100Mbps is enough, if stable. Most WiFi connected devices don't have high bandwidth requirement (you won't be downloading a 50-60GB BR-RIP on your smartphone), so IMO it's better if you get stable 150-200Mbps on all devices instead of a single device managing 1Gbps+. Which is exactly what WiFi6 is supposed to achieve.
1 Like
Looks like the same issue that myself and a few others have experienced. Supposedly there is a fix but it hasn't been committed yet.
According to this (https://dongknows.com/linksys-e8450-ax3200-wi-fi-6-router-review/) this model should be able to do ~900Mbps at ~10ft range and ~700Mbps at ~40ft range?
Cheers.
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Hi guys. I don't have wlan1 AX (5G Hz) at all in the latest snapshot (r17520-5ef4608c02, UBI) on RT3200. only wlan0 (wifi 4) is available in luci. I reset the firmware and the result is the same. It was after a sysupgrade I performed, and I lost the wifi. there is no file in /sys/fs/pstore for crash logs. Do you guys have any ideas?
So I'm on UBI now already. Do i flash openwrt-mediatek-mt7622-linksys_e8450-ubi-initramfs-recovery-installer.itb again?
Yes. You need that recovery upgrade first (to overcome the errors from the new flash driver) and then from recovery use sysupgrade to install the normal firmware.
EDIT:
you need at least version 0.5.3 or later, or a self-built up-to-date version of the recovery installer.
1 Like
Thanks. It works!
1 Like
Hope the fix will be committed soon. 
1 Like
hello everybody for your see the wifi work perfectly
put in your country destination or your live and make an auto channel
then 40 mhz for 2.4
and 80 for AX
i work with my wireless and sqm and the router has not problem
this is my config in luci GUI 
I believe 801.11r is broken at the moment on this router:
Wed Sep 15 21:09:12 2021 daemon.err hostapd: nl80211: kernel reports: key addition failed
Wed Sep 15 21:09:12 2021 daemon.err hostapd: nl80211: NL80211_ATTR_STA_VLAN (addr=XX ifname=wlan1 vlan_id=0) failed: -2 (No such file or directory)
Can anyone else please confirm?