5GHz wireless not working anymore on Netgear R7800

[FriedrichNietzsche]

Hi,

just now suddenly the 5 GHz wireless lan of my router stopped working. 2,4 GHz still looks good. When I have a look on the web inteface, I can see following:

If I check logread on the shell, I get following output:

//--------------------------------------------------
// trying to enable the wifi network
//--------------------------------------------------

Wed Mar 24 09:39:35 2021 daemon.notice netifd: radio0 (15573): command failed: Not supported (-95)
Wed Mar 24 09:39:36 2021 daemon.err hostapd: Configuration file: /var/run/hostapd-phy0.conf
Wed Mar 24 09:39:42 2021 kern.info kernel: [  283.727960] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
Wed Mar 24 09:39:42 2021 daemon.notice hostapd: wlan0: INTERFACE-ENABLED
Wed Mar 24 09:39:42 2021 kern.warn kernel: [  283.733962] ath10k_pci 0000:01:00.0: peer-unmap-event: unknown peer id 1
Wed Mar 24 09:39:42 2021 daemon.notice hostapd: wlan0: INTERFACE-DISABLED
Wed Mar 24 09:39:42 2021 daemon.err hostapd: nl80211: Could not configure driver mode
Wed Mar 24 09:39:42 2021 daemon.notice hostapd: nl80211: deinit ifname=wlan0 disabled_11b_rates=0
Wed Mar 24 09:39:42 2021 daemon.err hostapd: nl80211 driver initialization failed.
Wed Mar 24 09:39:42 2021 daemon.notice hostapd: wlan0: interface state UNINITIALIZED->DISABLED
Wed Mar 24 09:39:42 2021 daemon.notice hostapd: wlan0: AP-DISABLED
Wed Mar 24 09:39:42 2021 daemon.notice hostapd: wlan0: CTRL-EVENT-TERMINATING
Wed Mar 24 09:39:42 2021 daemon.err hostapd: hostapd_free_hapd_data: Interface wlan0 wasn't started
Wed Mar 24 09:39:42 2021 daemon.notice netifd: radio0 (15573): cat: can't open '/var/run/wifi-phy0.pid': No such file or directory
Wed Mar 24 09:39:42 2021 daemon.notice netifd: radio0 (15573): WARNING (wireless_add_process): executable path /usr/sbin/wpad does not match process  path ()
Wed Mar 24 09:39:42 2021 daemon.notice netifd: radio0 (15573): Command failed: Invalid argument
Wed Mar 24 09:39:42 2021 daemon.notice netifd: radio0 (15573): Device setup failed: HOSTAPD_START_FAILED

//--------------------------------------------------
// connected a client to the 2.4 GHz network
//--------------------------------------------------

Wed Mar 24 09:40:31 2021 daemon.info hostapd: wlan1: STA [MAC deleted] IEEE 802.11: authenticated
Wed Mar 24 09:40:31 2021 daemon.info hostapd: wlan1: STA [MAC deleted] IEEE 802.11: associated (aid 6)
Wed Mar 24 09:40:31 2021 daemon.notice hostapd: wlan1: AP-STA-CONNECTED [MAC deleted] 
Wed Mar 24 09:40:31 2021 daemon.info hostapd: wlan1: STA [MAC deleted] WPA: pairwise key handshake completed (RSN)

//--------------------------------------------------
// trying to create a new 5 GHz network
//--------------------------------------------------

Wed Mar 24 09:45:45 2021 daemon.notice netifd: radio0 (6769): command failed: Not supported (-95)
Wed Mar 24 09:45:59 2021 daemon.notice netifd: radio0 (7272): command failed: Not supported (-95)
Wed Mar 24 09:45:59 2021 daemon.err hostapd: Configuration file: /var/run/hostapd-phy0.conf
Wed Mar 24 09:46:05 2021 kern.info kernel: [  667.119132] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
Wed Mar 24 09:46:05 2021 daemon.notice hostapd: wlan0: INTERFACE-ENABLED
Wed Mar 24 09:46:05 2021 kern.warn kernel: [  667.122524] ath10k_pci 0000:01:00.0: peer-unmap-event: unknown peer id 1
Wed Mar 24 09:46:05 2021 daemon.notice hostapd: wlan0: INTERFACE-DISABLED
Wed Mar 24 09:46:05 2021 daemon.err hostapd: nl80211: Could not configure driver mode
Wed Mar 24 09:46:05 2021 daemon.notice hostapd: nl80211: deinit ifname=wlan0 disabled_11b_rates=0
Wed Mar 24 09:46:05 2021 daemon.err hostapd: nl80211 driver initialization failed.
Wed Mar 24 09:46:05 2021 daemon.notice hostapd: wlan0: interface state UNINITIALIZED->DISABLED
Wed Mar 24 09:46:05 2021 daemon.notice hostapd: wlan0: AP-DISABLED
Wed Mar 24 09:46:05 2021 daemon.notice hostapd: wlan0: CTRL-EVENT-TERMINATING
Wed Mar 24 09:46:05 2021 daemon.err hostapd: hostapd_free_hapd_data: Interface wlan0 wasn't started
Wed Mar 24 09:46:05 2021 daemon.notice netifd: radio0 (7272): cat: can't open '/var/run/wifi-phy0.pid': No such file or directory
Wed Mar 24 09:46:05 2021 daemon.notice netifd: radio0 (7272): WARNING (wireless_add_process): executable path /usr/sbin/wpad does not match process  path ()
Wed Mar 24 09:46:05 2021 daemon.notice netifd: radio0 (7272): Command failed: Invalid argument
Wed Mar 24 09:46:05 2021 daemon.notice netifd: radio0 (7272): Device setup failed: HOSTAPD_START_FAILED

Is this a hardware issue?

[FriedrichNietzsche]

No one has a hint?

[DavidJ]

I would save settings then reset, if that did not fix then I would roll back to OEM firmware (making sure no warnings on OpenWRT for your router),

If the 5Ghz works on OEM firmware you know it is not a hardware issue.

Then start over installation of OpenWrt

[FriedrichNietzsche]

Sorry for not replying for such a long time. I now finally found some time to do a fresh setup and went directly to do a clean install of OpenWRT. This solved the problem. Thank you.