WRT3200ACM mwlwifi DFS/160 explanation

Hi everyone !
I've got a WRT3200ACM bought in France on Amazon, running latest LEDE snapshot wich works well until now.
After reading a lot of topics (david's thread, LEDE forum, kaloz github issue), I still have somme questions regarding the wifi configuration.
From now, here is my configuration:

root@linksys:~# cat /etc/config/wireless
config wifi-device 'radio0'
  option type 'mac80211'
  option hwmode '11a'
  option path 'soc/soc:pcie-controller/pci0000:00/0000:00:01.0/0000:01:00.0'
  option country 'FR'
  option channel '48'
  option htmode 'VHT80'

config wifi-iface 'default_radio0'
  option device 'radio0'
  option network 'lan'
  option mode 'ap'
  option encryption 'psk2+tkip+ccmp'
  option key 'xxxx
  option macfilter 'allow'
  list maclist 'xxxx'
  option ssid 'xxxx'
  option hidden '1'

config wifi-device 'radio1'
option type 'mac80211'
option hwmode '11g'
option path 'soc/soc:pcie-controller/pci0000:00/0000:00:02.0/0000:02:00.0'
option channel 'auto'
option country 'FR'
option htmode 'HT20'

config wifi-iface 'default_radio1'
  option device 'radio1'
  option mode 'ap'
  option network 'lan'
  option macfilter 'allow'
  option encryption 'psk2+tkip+ccmp'
  option key 'xxxx'
  option ssid 'xxxx'
  option hidden '1'
  list maclist 'xxxx'

config wifi-device 'radio2'
  option type 'mac80211'
  option channel '36'
  option hwmode '11a'
  option path 'platform/soc/soc:internal-regs/f10d8000.sdhci/mmc_host/mmc0/mmc0:0001/mmc0:0001:1'
  option htmode 'VHT80'
  option country 'US'

config wifi-iface 'default_radio2'
  option device 'radio2'
  option network 'lan'
  option ssid 'xxxx'
  option mode 'monitor'
  option disabled '1'

root@linksys:~# opkg list-installed | grep mwlwi
kmod-mwlwifi - 4.9.30+10.3.4.0.git-2017-05-26-1

root@linksys:~# iw reg get
global
country 98: DFS-UNSET
	(2402 - 2472 @ 40), (N/A, 20), (N/A)
	(5170 - 5250 @ 80), (N/A, 20), (N/A), AUTO-BW
	(5250 - 5330 @ 80), (N/A, 20), (0 ms), DFS, AUTO-BW
	(5490 - 5710 @ 160), (N/A, 23), (0 ms), DFS
	(57240 - 63720 @ 2160), (N/A, 40), (N/A)

phy#2
country US: DFS-FCC
	(2402 - 2472 @ 40), (N/A, 30), (N/A)
	(5170 - 5250 @ 80), (N/A, 23), (N/A), AUTO-BW
	(5250 - 5330 @ 80), (N/A, 23), (0 ms), DFS, AUTO-BW
	(5490 - 5730 @ 160), (N/A, 23), (0 ms), DFS
	(5735 - 5835 @ 80), (N/A, 30), (N/A)
	(57240 - 63720 @ 2160), (N/A, 40), (N/A)

phy#1
country FR: DFS-ETSI
	(2402 - 2482 @ 40), (N/A, 20), (N/A)
	(5170 - 5250 @ 80), (N/A, 20), (N/A), AUTO-BW
	(5250 - 5330 @ 80), (N/A, 20), (0 ms), DFS, AUTO-BW
	(5490 - 5710 @ 160), (N/A, 27), (0 ms), DFS
	(57000 - 66000 @ 2160), (N/A, 40), (N/A)

phy#0
country FR: DFS-ETSI
	(2402 - 2482 @ 40), (N/A, 20), (N/A)
	(5170 - 5250 @ 80), (N/A, 20), (N/A), AUTO-BW
	(5250 - 5330 @ 80), (N/A, 20), (0 ms), DFS, AUTO-BW
	(5490 - 5710 @ 160), (N/A, 27), (0 ms), DFS
	(57000 - 66000 @ 2160), (N/A, 40), (N/A)

Everything works quite well but I notice that the 5GHz power is quite low, so I want to test DFS to see if it change something.
I've tried many configuration:

  • channel 36 / width 80: OK

  • channel 100 / width: 80: KO. The device try 3 times to get up (around 1mn I believe to perform DFS check) and then go down. Here are the logs:

      Thu Jun  1 19:29:43 2017 daemon.notice hostapd: wlan0: interface state ENABLED->DISABLED
      Thu Jun  1 19:29:43 2017 daemon.notice hostapd: wlan0: AP-DISABLED 
      Thu Jun  1 19:29:43 2017 daemon.notice hostapd: wlan0: CTRL-EVENT-TERMINATING 
      Thu Jun  1 19:29:43 2017 daemon.notice hostapd: nl80211: deinit ifname=wlan0 disabled_11b_rates=0
      Thu Jun  1 19:29:43 2017 kern.info kernel: [  959.788388] device wlan0 left promiscuous mode
      Thu Jun  1 19:29:43 2017 kern.info kernel: [  959.792890] br-lan: port 2(wlan0) entered disabled state
      Thu Jun  1 19:29:43 2017 kern.debug kernel: [  959.808312] ieee80211 phy0: change: 0x40
      Thu Jun  1 19:29:43 2017 kern.debug kernel: [  959.913313] ieee80211 phy0: change: 0x100
      Thu Jun  1 19:29:43 2017 daemon.notice netifd: Network device 'wlan0' link is down
      Thu Jun  1 19:29:43 2017 daemon.notice netifd: radio0 (3790): command failed: Not supported (-95)
      Thu Jun  1 19:29:43 2017 daemon.err hostapd: Configuration file: /var/run/hostapd-phy0.conf
      Thu Jun  1 19:29:43 2017 kern.debug kernel: [  960.341281] ieee80211 phy0: change: 0xffffffff
      Thu Jun  1 19:29:44 2017 kern.info kernel: [  960.447460] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
      Thu Jun  1 19:29:44 2017 kern.info kernel: [  960.454134] br-lan: port 2(wlan0) entered blocking state
      Thu Jun  1 19:29:44 2017 kern.info kernel: [  960.459486] br-lan: port 2(wlan0) entered disabled state
      Thu Jun  1 19:29:44 2017 kern.info kernel: [  960.464939] device wlan0 entered promiscuous mode
      Thu Jun  1 19:29:44 2017 kern.info kernel: [  960.469714] br-lan: port 2(wlan0) entered blocking state
      Thu Jun  1 19:29:44 2017 kern.info kernel: [  960.475050] br-lan: port 2(wlan0) entered forwarding state
      Thu Jun  1 19:29:44 2017 daemon.notice hostapd: wlan0: interface state UNINITIALIZED->COUNTRY_UPDATE
      Thu Jun  1 19:29:44 2017 kern.info kernel: [  960.938319] br-lan: port 2(wlan0) entered disabled state
      Thu Jun  1 19:29:45 2017 daemon.notice hostapd: handle_probe_req: send failed
      Thu Jun  1 19:29:49 2017 daemon.notice hostapd: wlan0: interface state COUNTRY_UPDATE->HT_SCAN
      Thu Jun  1 19:29:49 2017 kern.debug kernel: [  965.481372] ieee80211 phy0: change: 0x100
      Thu Jun  1 19:29:49 2017 kern.debug kernel: [  965.494472] ieee80211 phy0: change: 0x60
      Thu Jun  1 19:29:49 2017 kern.debug kernel: [  965.708161] ieee80211 phy0: change: 0x40
      Thu Jun  1 19:29:49 2017 daemon.notice hostapd: wlan0: interface state HT_SCAN->DFS
      Thu Jun  1 19:29:49 2017 daemon.notice hostapd: wlan0: DFS-CAC-START freq=5500 chan=100 sec_chan=1, width=1, seg0=106, seg1=0, cac_time=60s
      Thu Jun  1 19:29:49 2017 daemon.err hostapd: DFS start_dfs_cac() failed, -1
      Thu Jun  1 19:29:49 2017 daemon.err hostapd: Interface initialization failed
      Thu Jun  1 19:29:49 2017 daemon.notice hostapd: wlan0: interface state DFS->DISABLED
      Thu Jun  1 19:29:49 2017 daemon.notice hostapd: wlan0: AP-DISABLED 
      Thu Jun  1 19:29:49 2017 daemon.notice hostapd: wlan0: interface state DISABLED->DISABLED
      Thu Jun  1 19:29:49 2017 daemon.notice hostapd: wlan0: AP-DISABLED 
      Thu Jun  1 19:29:49 2017 daemon.notice hostapd: wlan0: CTRL-EVENT-TERMINATING 
      Thu Jun  1 19:29:49 2017 daemon.err hostapd: hostapd_free_hapd_data: Interface wlan0 wasn't started
      Thu Jun  1 19:29:49 2017 daemon.notice hostapd: nl80211: deinit ifname=wlan0 disabled_11b_rates=0
      Thu Jun  1 19:29:49 2017 kern.debug kernel: [  965.928157] ieee80211 phy0: change: 0x60
      Thu Jun  1 19:29:49 2017 kern.info kernel: [  965.978200] device wlan0 left promiscuous mode
      Thu Jun  1 19:29:49 2017 kern.info kernel: [  965.982693] br-lan: port 2(wlan0) entered disabled state
      Thu Jun  1 19:29:49 2017 kern.debug kernel: [  966.032178] ieee80211 phy0: change: 0x100
      Thu Jun  1 19:29:49 2017 daemon.notice hostapd: ELOOP: remaining socket: sock=22 eloop_data=0xb6e94ab0 user_data=0 handler=0x3545c
      Thu Jun  1 19:29:49 2017 daemon.notice netifd: radio0 (3790): WARNING (wireless_add_process): executable path /usr/sbin/wpad does not match process 3481 path ()
      Thu Jun  1 19:29:49 2017 kern.debug kernel: [  966.212177] ieee80211 phy0: change: 0xffffffff
      Thu Jun  1 19:29:49 2017 kern.info kernel: [  966.322198] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
      Thu Jun  1 19:30:00 2017 daemon.notice netifd: radio0 (3894): command failed: Not supported (-95)
      Thu Jun  1 19:30:00 2017 daemon.err hostapd: Configuration file: /var/run/hostapd-phy0.conf
      Thu Jun  1 19:30:00 2017 kern.debug kernel: [  976.704976] ieee80211 phy0: change: 0xffffffff
      Thu Jun  1 19:30:00 2017 kern.info kernel: [  976.814172] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
      Thu Jun  1 19:30:00 2017 kern.info kernel: [  976.820911] br-lan: port 2(wlan0) entered blocking state
      Thu Jun  1 19:30:00 2017 kern.info kernel: [  976.826245] br-lan: port 2(wlan0) entered disabled state
      Thu Jun  1 19:30:00 2017 daemon.notice hostapd: wlan0: interface state UNINITIALIZED->COUNTRY_UPDATE
      Thu Jun  1 19:30:00 2017 kern.info kernel: [  976.831714] device wlan0 entered promiscuous mode
      Thu Jun  1 19:30:03 2017 daemon.notice hostapd: handle_probe_req: send failed
      Thu Jun  1 19:30:04 2017 daemon.notice hostapd: handle_probe_req: send failed
      Thu Jun  1 19:30:05 2017 daemon.notice hostapd: wlan0: interface state COUNTRY_UPDATE->HT_SCAN
      Thu Jun  1 19:30:05 2017 kern.debug kernel: [  981.836956] ieee80211 phy0: change: 0x100
      Thu Jun  1 19:30:05 2017 kern.debug kernel: [  981.850053] ieee80211 phy0: change: 0x60
      Thu Jun  1 19:30:05 2017 daemon.notice hostapd: handle_probe_req: send failed
      Thu Jun  1 19:30:05 2017 kern.debug kernel: [  982.057901] ieee80211 phy0: change: 0x40
      Thu Jun  1 19:30:05 2017 daemon.notice hostapd: wlan0: interface state HT_SCAN->DFS
      Thu Jun  1 19:30:05 2017 daemon.notice hostapd: wlan0: DFS-CAC-START freq=5500 chan=100 sec_chan=1, width=1, seg0=106, seg1=0, cac_time=60s
      Thu Jun  1 19:30:05 2017 daemon.err hostapd: DFS start_dfs_cac() failed, -1
      Thu Jun  1 19:30:05 2017 daemon.err hostapd: Interface initialization failed
      Thu Jun  1 19:30:05 2017 daemon.notice hostapd: wlan0: interface state DFS->DISABLED
      Thu Jun  1 19:30:05 2017 daemon.notice hostapd: wlan0: AP-DISABLED 
      Thu Jun  1 19:30:05 2017 daemon.notice hostapd: wlan0: interface state DISABLED->DISABLED
      Thu Jun  1 19:30:05 2017 daemon.notice hostapd: wlan0: AP-DISABLED 
      Thu Jun  1 19:30:05 2017 daemon.notice hostapd: wlan0: CTRL-EVENT-TERMINATING 
      Thu Jun  1 19:30:05 2017 daemon.err hostapd: hostapd_free_hapd_data: Interface wlan0 wasn't started
      Thu Jun  1 19:30:05 2017 daemon.notice hostapd: nl80211: deinit ifname=wlan0 disabled_11b_rates=0
      Thu Jun  1 19:30:05 2017 kern.debug kernel: [  982.277880] ieee80211 phy0: change: 0x60
      Thu Jun  1 19:30:05 2017 kern.info kernel: [  982.317921] device wlan0 left promiscuous mode
      Thu Jun  1 19:30:05 2017 kern.info kernel: [  982.322415] br-lan: port 2(wlan0) entered disabled state
      Thu Jun  1 19:30:05 2017 kern.debug kernel: [  982.376892] ieee80211 phy0: change: 0x100
      Thu Jun  1 19:30:05 2017 daemon.notice hostapd: ELOOP: remaining socket: sock=22 eloop_data=0xb6f3b510 user_data=0 handler=0x3545c
      Thu Jun  1 19:30:05 2017 daemon.notice netifd: radio0 (3894): WARNING (wireless_add_process): executable path /usr/sbin/wpad does not match process 3481 path ()
      Thu Jun  1 19:30:06 2017 kern.debug kernel: [  982.554878] ieee80211 phy0: change: 0xffffffff
      Thu Jun  1 19:30:06 2017 kern.info kernel: [  982.663922] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
      Thu Jun  1 19:30:16 2017 daemon.notice netifd: radio0 (4007): command failed: Not supported (-95)
      Thu Jun  1 19:30:16 2017 daemon.err hostapd: Configuration file: /var/run/hostapd-phy0.conf
      Thu Jun  1 19:30:16 2017 kern.debug kernel: [  993.054705] ieee80211 phy0: change: 0xffffffff
      Thu Jun  1 19:30:16 2017 kern.info kernel: [  993.162891] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
      Thu Jun  1 19:30:16 2017 kern.info kernel: [  993.169609] br-lan: port 2(wlan0) entered blocking state
      Thu Jun  1 19:30:16 2017 kern.info kernel: [  993.174945] br-lan: port 2(wlan0) entered disabled state
      Thu Jun  1 19:30:16 2017 daemon.notice hostapd: wlan0: interface state UNINITIALIZED->COUNTRY_UPDATE
      Thu Jun  1 19:30:16 2017 kern.info kernel: [  993.180414] device wlan0 entered promiscuous mode
      Thu Jun  1 19:30:20 2017 daemon.notice hostapd: handle_probe_req: send failed
      Thu Jun  1 19:30:21 2017 daemon.notice hostapd: wlan0: interface state COUNTRY_UPDATE->HT_SCAN
      Thu Jun  1 19:30:21 2017 kern.debug kernel: [  998.185637] ieee80211 phy0: change: 0x100
      Thu Jun  1 19:30:21 2017 kern.debug kernel: [  998.197644] ieee80211 phy0: change: 0x60
      Thu Jun  1 19:30:21 2017 kern.debug kernel: [  998.407610] ieee80211 phy0: change: 0x40
      Thu Jun  1 19:30:22 2017 daemon.notice hostapd: wlan0: interface state HT_SCAN->DFS
      Thu Jun  1 19:30:22 2017 daemon.notice hostapd: wlan0: DFS-CAC-START freq=5500 chan=100 sec_chan=1, width=1, seg0=106, seg1=0, cac_time=60s
      Thu Jun  1 19:30:22 2017 daemon.err hostapd: DFS start_dfs_cac() failed, -1
      Thu Jun  1 19:30:22 2017 daemon.err hostapd: Interface initialization failed
      Thu Jun  1 19:30:22 2017 daemon.notice hostapd: wlan0: interface state DFS->DISABLED
      Thu Jun  1 19:30:22 2017 daemon.notice hostapd: wlan0: AP-DISABLED 
      Thu Jun  1 19:30:22 2017 daemon.notice hostapd: wlan0: interface state DISABLED->DISABLED
      Thu Jun  1 19:30:22 2017 daemon.notice hostapd: wlan0: AP-DISABLED 
      Thu Jun  1 19:30:22 2017 daemon.notice hostapd: wlan0: CTRL-EVENT-TERMINATING 
      Thu Jun  1 19:30:22 2017 daemon.err hostapd: hostapd_free_hapd_data: Interface wlan0 wasn't started
      Thu Jun  1 19:30:22 2017 daemon.notice hostapd: nl80211: deinit ifname=wlan0 disabled_11b_rates=0
      Thu Jun  1 19:30:22 2017 kern.debug kernel: [  998.627603] ieee80211 phy0: change: 0x60
      Thu Jun  1 19:30:22 2017 kern.info kernel: [  998.667642] device wlan0 left promiscuous mode
      Thu Jun  1 19:30:22 2017 kern.info kernel: [  998.672137] br-lan: port 2(wlan0) entered disabled state
      Thu Jun  1 19:30:22 2017 kern.debug kernel: [  998.729650] ieee80211 phy0: change: 0x100
      Thu Jun  1 19:30:22 2017 daemon.notice hostapd: ELOOP: remaining socket: sock=22 eloop_data=0xb6f21620 user_data=0 handler=0x3545c
      Thu Jun  1 19:30:22 2017 daemon.notice netifd: radio0 (4007): WARNING (wireless_add_process): executable path /usr/sbin/wpad does not match process 3481 path ()
      Thu Jun  1 19:30:22 2017 kern.debug kernel: [  998.909631] ieee80211 phy0: change: 0xffffffff
      Thu Jun  1 19:30:22 2017 kern.info kernel: [  999.019667] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
      Thu Jun  1 19:30:32 2017 daemon.notice netifd: radio0 (4113): command failed: Not supported (-95)
      Thu Jun  1 19:30:32 2017 daemon.err hostapd: Configuration file: /var/run/hostapd-phy0.conf
      Thu Jun  1 19:30:32 2017 kern.debug kernel: [ 1009.404407] ieee80211 phy0: change: 0xffffffff
      Thu Jun  1 19:30:33 2017 kern.info kernel: [ 1009.513596] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
      Thu Jun  1 19:30:33 2017 kern.info kernel: [ 1009.520483] br-lan: port 2(wlan0) entered blocking state
      Thu Jun  1 19:30:33 2017 kern.info kernel: [ 1009.525818] br-lan: port 2(wlan0) entered disabled state
      Thu Jun  1 19:30:33 2017 daemon.notice hostapd: wlan0: interface state UNINITIALIZED->COUNTRY_UPDATE
      Thu Jun  1 19:30:33 2017 kern.info kernel: [ 1009.531287] device wlan0 entered promiscuous mode
      Thu Jun  1 19:30:34 2017 daemon.notice hostapd: handle_probe_req: send failed
      Thu Jun  1 19:30:36 2017 daemon.notice hostapd: handle_probe_req: send failed
      Thu Jun  1 19:30:37 2017 daemon.notice hostapd: handle_probe_req: send failed
      Thu Jun  1 19:30:38 2017 daemon.notice hostapd: wlan0: interface state COUNTRY_UPDATE->HT_SCAN
      Thu Jun  1 19:30:38 2017 kern.debug kernel: [ 1014.536682] ieee80211 phy0: change: 0x100
      Thu Jun  1 19:30:38 2017 kern.debug kernel: [ 1014.549759] ieee80211 phy0: change: 0x60
      Thu Jun  1 19:30:38 2017 kern.debug kernel: [ 1014.767307] ieee80211 phy0: change: 0x40
      Thu Jun  1 19:30:38 2017 daemon.notice hostapd: wlan0: interface state HT_SCAN->DFS
      Thu Jun  1 19:30:38 2017 daemon.notice hostapd: wlan0: DFS-CAC-START freq=5500 chan=100 sec_chan=1, width=1, seg0=106, seg1=0, cac_time=60s
      Thu Jun  1 19:30:38 2017 daemon.err hostapd: DFS start_dfs_cac() failed, -1
      Thu Jun  1 19:30:38 2017 daemon.err hostapd: Interface initialization failed
      Thu Jun  1 19:30:38 2017 daemon.notice hostapd: wlan0: interface state DFS->DISABLED
      Thu Jun  1 19:30:38 2017 daemon.notice hostapd: wlan0: AP-DISABLED 
      Thu Jun  1 19:30:38 2017 daemon.notice hostapd: wlan0: interface state DISABLED->DISABLED
      Thu Jun  1 19:30:38 2017 daemon.notice hostapd: wlan0: AP-DISABLED 
      Thu Jun  1 19:30:38 2017 daemon.notice hostapd: wlan0: CTRL-EVENT-TERMINATING 
      Thu Jun  1 19:30:38 2017 daemon.err hostapd: hostapd_free_hapd_data: Interface wlan0 wasn't started
      Thu Jun  1 19:30:38 2017 daemon.notice hostapd: nl80211: deinit ifname=wlan0 disabled_11b_rates=0
      Thu Jun  1 19:30:38 2017 kern.debug kernel: [ 1014.987298] ieee80211 phy0: change: 0x60
      Thu Jun  1 19:30:38 2017 kern.info kernel: [ 1015.027355] device wlan0 left promiscuous mode
      Thu Jun  1 19:30:38 2017 kern.info kernel: [ 1015.031845] br-lan: port 2(wlan0) entered disabled state
      Thu Jun  1 19:30:38 2017 kern.debug kernel: [ 1015.087303] ieee80211 phy0: change: 0x100
      Thu Jun  1 19:30:38 2017 daemon.notice hostapd: ELOOP: remaining socket: sock=22 eloop_data=0xb6e6d5d0 user_data=0 handler=0x3545c
      Thu Jun  1 19:30:38 2017 daemon.notice netifd: radio0 (4113): WARNING (wireless_add_process): executable path /usr/sbin/wpad does not match process 3481 path ()
      Thu Jun  1 19:30:38 2017 kern.debug kernel: [ 1015.265310] ieee80211 phy0: change: 0xffffffff
      Thu Jun  1 19:30:38 2017 kern.info kernel: [ 1015.373341] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
    
  • Tried with the third radio enable: nothing changed. The 5GHz radio is still down

  • I've also encounter a case when the radio is down (no Wifi visible) but the GUI says the opposite

  • Also tried "rs-se" tips, and nothing changed either:

      rm -f /etc/config/wireless
      wifi detect > /etc/config/wireless
      reboot
    

So here are my questions:

  • does anyone has a fonctionnal 5ghz wifi with DFS ?
  • does the third radio (the DFS one ?) has to be enable to work ? If yes, which is the configuration ?
  • is 160MHz width works ? (I've tried channel 36 as yuhhaurlin said it works, but not for me...)

Thanks a lot !

nobody ? :cry:

They are still working on a good driver for the WRT3200ACM. See here https://github.com/kaloz/mwlwifi

I hope and I guess...
I've asked the question because I've seen some posts where someone has a functional [DFS] (https://github.com/kaloz/mwlwifi/issues/169#issuecomment-306570492) so I wonder why not me
Maybe with the new mwlwifi driver !

For the second question, it seems that the radio don't need to be up

For those how are interested in the resolution, yuhhaurlin provide a step to have a functional 5GHz with DFS/160MHz with the latest drivers:

Hi

Sorry to bump and old post but after searching the forums your symptons were very similar to mine on my WRT1900AC v1.

I select a channel above 48, wait around 60 seconds for the AP to come online and then after a short while it drops out, and under the LuCI GUI it displays a different channel to what was set.

I've just compiled a new build of OpenWRT 18.06.1 with the commit 'c2c8244d8fea5d59762cb14438ded00bf6d5965c' and I'm hoping the Wi-Fi drivers are somewhat better than the version I was running on the 14th November commit.

found here

Has anyone found a fix to the DFS problem?

Will

This is not a problem, this is normal and expected behavior. DFS bands will kick you if there is interference on the channel.

See: http://wifi-insider.com/wlan/dfs.htm

I just tried DFS channels on my WRT1900ACS and it just never comes up, this is always what happens to me. It starts the scan, and then says DFS->ENABLED but the radio stays offline, no signal appears in my wifi analyzer app on my phone, and nothing ever happens at all. it doesn't kick me back to a different channel, it just shows say channel 104 and nothing else happens.

I have never once gotten DFS to come online on any device.

It's not good to dig up this old thread. I will post a new thread about this. I've wondered about it for a while, just never bothered to debug. @willowen100 here is my new thread: DFS doesn't fail, but never comes online

2 Likes

Thank you for creating a new post. We shall continue over there :slight_smile:

1 Like

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