Missing Radio1 5GHz WiFi after upgrade WDR3600

Hi there,
I upgraded TP-Link TL-WDR3600 from 21.02 to 22.03.2 and notice 5GHz wifi didn't work. Tried reset configuration. Radio1 interface not showing up. What can I do?

root@OpenWrt:/etc/config# lspci -v
00:00.0 Network controller: Qualcomm Atheros AR958x 802.11abgn Wireless Network Adapter (rev 01)
        Subsystem: Qualcomm Atheros AR9582 802.11a/n WLAN Mini-PCIe Adapter
        Device tree node: /sys/firmware/devicetree/base/ahb/pcie-controller@180c0000/wifi@0,0
        Flags: fast devsel, IRQ 14
        Memory at 10000000 (64-bit, non-prefetchable) [size=128K]
        Expansion ROM at 10020000 [virtual] [disabled] [size=64K]
        Capabilities: [40] Power Management version 3
        Capabilities: [50] MSI: Enable- Count=1/4 Maskable+ 64bit+
        Capabilities: [70] Express Endpoint, MSI 00
        Capabilities: [100] Advanced Error Reporting
        Capabilities: [140] Virtual Channel
        Capabilities: [300] Device Serial Number 00-00-00-00-00-00-00-00
lspci: Unable to load libkmod resources: error -12
root@OpenWrt:/etc/config# cat wireless

config wifi-device 'radio0'
        option type 'mac80211'
        option path 'platform/ahb/18100000.wmac'
        option channel '1'
        option band '2g'
        option htmode 'HT20'
        option cell_density '0'

config wifi-iface 'default_radio0'
        option device 'radio0'
        option network 'lan'
        option mode 'ap'
        option ssid 'edited'
        option encryption 'sae-mixed'
        option key 'edited'

Try with this (then add the interface):

config wifi-device 'radio1'
	option type 'mac80211'
	option hwmode '11a'
	option htmode 'HT80'
	option channel '36'
	option path 'pci0000:00/0000:00:00.0'
	option disabled '0'

I even reflashed to stock and 5ghz was not up, so I decided to disassembly router. Found coffee marks on back side PCB and dust. Cleaned everything and 5GHz back to life :slight_smile:

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