WRT1900ACS v2 radio0 (5GHz) stopped working

Installing and Using OpenWrt Network and Wireless Configuration
1

I have a WRT1900ACS v2 with latest (2017-10-18 21:00) firmware by davidc502. Initially both 5GHz and 2.4GHz work just fine. But after a few reboots, 5GHz begin to have difficulty starting up (in Luci, it shows 0% in the signal bars and "?" for Mbit/s). Finally, it would no longer start up anymore.

Sorry, I'm a bit new at this. I'm trying the best I can to troubleshoot but I'm at a loss.

I removed "wpad-mini" and installed "wpad". The version of mwlwifi driver I have installed is 4.9.57+10.3.4.0-20170810-1.

No matter what channel I choose, the result is the same.

I checked system log (exerpt of what I thought is of interest):

Fri Oct 20 16:18:09 2017 daemon.notice hostapd: wlan0: interface state ENABLED-DISABLED
Fri Oct 20 16:18:09 2017 daemon.notice hostapd: wlan0: AP-DISABLED
Fri Oct 20 16:18:09 2017 daemon.notice hostapd: wlan0: CTRL-EVENT-TERMINATING
Fri Oct 20 16:18:09 2017 daemon.notice hostapd: nl80211: deinit ifname=wlan0 disabled_11b_rates=0
Fri Oct 20 16:18:09 2017 kern. info kernel: [64847.321107] device wlan0 left promiscuous mode
Fri Oct 20 16:18:09 2017 kern. info kernel: [64847.325640] br-lan: port 2(wlan0) entered disabled state
Fri Oct 20 16:18:09 2017 kern.debug kernel: [64847.341090] ieee80211 phy0: change: 0x40
Fri Oct 20 16:18:09 2017 kern.debug kernel: [64847.415208] ieee80211 phy0: change: 0x100
Fri Oct 20 16:18:09 2017 daemon.notice netifd: Network device 'wlan0' link is down
Fri Oct 20 16:18:09 2017 daemon.notice netifd: radio0 (18549): command failed: Not supported (-95)
Fri Oct 20 16:18:09 2017 daemon.err hostapd: Configuration file: /var/run/hostapd-phy0.conf
Fri Oct 20 16:18:09 2017 kern.debug kernel: [64847.851017] ieee80211 phy0: change: 0xffffffff
Fri Oct 20 16:18:09 2017 kern. info kernel: [64847.929256] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
Fri Oct 20 16:18:09 2017 kern. info kernel: [64847.936762] br-lan: port 2(wlan0) entered blocking state
Fri Oct 20 16:18:09 2017 kern. info kernel: [64847.942136] br-lan: port 2(wlan0) entered disabled state
Fri Oct 20 16:18:09 2017 kern. info kernel: [64847.947641] device wlan0 entered promiscuous mode
Fri Oct 20 16:18:09 2017 kern. info kernel: [64847.952441] br-lan: port 2(wlan0) entered blocking state
Fri Oct 20 16:18:09 2017 kern. info kernel: [64847.957780] br-lan: port 2(wlan0) entered forwarding state
Fri Oct 20 16:18:09 2017 daemon.notice hostapd: wlan0: interface state UNINITIALIZED-COUNTRY_UPDATE
Fri Oct 20 16:18:09 2017 daemon.notice hostapd: wlan0: interface state COUNTRY_UPDATE-HT_SCAN
Fri Oct 20 16:18:09 2017 kern.debug kernel: [64847.963940] ieee80211 phy0: change: 0x100
Fri Oct 20 16:18:09 2017 kern.debug kernel: [64847.977101] ieee80211 phy0: change: 0x60
Fri Oct 20 16:18:10 2017 kern.debug kernel: [64848.161031] ieee80211 phy0: change: 0x40
Fri Oct 20 16:18:10 2017 kern.debug kernel: [64848.341014] ieee80211 phy0: change: 0x60
Fri Oct 20 16:18:10 2017 kern.debug kernel: [64848.410091] ieee80211 phy0: change: 0x100
Fri Oct 20 16:18:10 2017 daemon.err hostapd: Using interface wlan0 with hwaddr 00:25:9c:14:2b:88 and ssid "D-Home"
Fri Oct 20 16:18:10 2017 kern. info kernel: [64848.431809] br-lan: port 2(wlan0) entered disabled state
Fri Oct 20 16:18:10 2017 kern.debug kernel: [64848.484627] ieee80211 phy0: change: 0x100
Fri Oct 20 16:18:10 2017 kern.debug kernel: [64848.497681] ieee80211 phy0: change: 0x62
Fri Oct 20 16:18:10 2017 kern. info kernel: [64848.636020] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready
Fri Oct 20 16:18:10 2017 kern. info kernel: [64848.642466] br-lan: port 2(wlan0) entered blocking state
Fri Oct 20 16:18:10 2017 kern. info kernel: [64848.647800] br-lan: port 2(wlan0) entered forwarding state
Fri Oct 20 16:18:10 2017 daemon.notice hostapd: wlan0: interface state HT_SCAN->ENABLED
Fri Oct 20 16:18:10 2017 daemon.notice hostapd: wlan0: AP-ENABLED
Fri Oct 20 16:18:10 2017 daemon.notice netifd: Network device 'wlan0' link is up

In checking "uci show wireless"

wireless.radio0=wifi-device
wireless.radio0.type='mac80211'
wireless.radio0.hwmode='11a'
wireless.radio0.path='soc/soc:pcie-controller/pci0000:00/0000:00:01.0/0000:01:00.0'
wireless.radio0.country='CA'
wireless.radio0.htmode='VHT40'
wireless.radio0.channel='36'
wireless.radio1=wifi-device
wireless.radio1.type='mac80211'
wireless.radio1.hwmode='11g'
wireless.radio1.path='soc/soc:pcie-controller/pci0000:00/0000:00:02.0/0000:02:00.0'
wireless.radio1.htmode='HT20'
wireless.radio1.country='CA'
wireless.radio1.channel='1'

Checking "iwinfo wlan0 info"

     Mode: Master  Channel: 36 (5.180 GHz)
     Tx-Power: 23 dBm  Link Quality: unknown/70
     Signal: unknown  Noise: -92 dBm
     Bit Rate: unknown
     Encryption: WPA2 PSK (CCMP)
     Type: nl80211  HW Mode(s): 802.11nac
     Hardware: 11AB:2A55 11AB:0000 [Marvell 88W8864]
     TX power offset: none
     Frequency offset: none
     Supports VAPs: yes  PHY name: phy0

Any ideas what could be wrong? From the system/kernel logs, I see something IS wrong, but I don't what it could be.

2

Did you solve this? I have exactly same issue image

3

I'm not sure it was a solution but in talking to Linksys support, they mentioned the radio will not be "active" unless specifically associated with a device. You can try this:

  • Change your 802.11ac SSID to something different from 802.11bgn SSID
  • Explicitly connect a device to the 802.11ac SSID

See if you get a non-0% on the admin page. This will explicitly test to see if all the radio on your router is working.

My problem was that I named the SSID the same across both radio (like you) and all my devices were all connecting to either 5GHz or 2.4GHz. OpenWRT Wireless page is slightly confusing in this regard. When it says Wireless is disabled or not associated, I automatically think disabled and didn't think there was no device associated.

Give that a try!

4

There is also DFS channels. If a DFS channel is selected the router will listen for traffic and will not come on-line until the traffic has cleared. Also, if using a DFS channel, and interference is detected it will automatically switch to another channel.

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