Hi,
I am having a very similar issue to @godhand2.
Pi-hole has been running on raspberry pi zero W for almost 1 month with no issues.
I recently (approx 1 week ago) updated the pi-hole and since then, the pi has intermittently stopped working.
When this happens I can't perform DNS lookups from any device on the lan, can't ping or ssh into the RPI, can't hit the pi-hole web interface over http.
I have to pull the power on the RPI and it then restarts.
I don't have a wifi dongle, so I'm not sure that 'Disable Wifi Power Management' link is relevant, however, when I run ' iwconfig' on the RPI it indicates:
'Power Management:on'
I've also noticed the following happing repeatedly in /var/log/syslog despite the fact that the RPI has a static IP address.
Jan 30 02:38:55 pi-hole dhcpcd[444]: wlan0: carrier lost
Jan 30 02:38:55 pi-hole dhcpcd[444]: wlan0: deleting address ...
Jan 30 02:38:55 pi-hole avahi-daemon[257]: Withdrawing address record for ... on wlan0.
Jan 30 02:38:55 pi-hole avahi-daemon[257]: Leaving mDNS multicast group on interface wlan0.IPv6 with address ...
Jan 30 02:38:55 pi-hole avahi-daemon[257]: Interface wlan0.IPv6 no longer relevant for mDNS.
Jan 30 02:38:55 pi-hole avahi-daemon[257]: Withdrawing address record for 192.168.0.x on wlan0.
Jan 30 02:38:55 pi-hole avahi-daemon[257]: Leaving mDNS multicast group on interface wlan0.IPv4 with address 192.168.0.x.
Jan 30 02:38:55 pi-hole avahi-daemon[257]: Interface wlan0.IPv4 no longer relevant for mDNS.
Jan 30 02:38:55 pi-hole dhcpcd[444]: wlan0: deleting route to 192.168.0.0/24
Jan 30 02:38:55 pi-hole dhcpcd[444]: wlan0: deleting default route via 192.168.0.1
Jan 30 02:38:56 pi-hole dhcpcd[444]: wlan0: carrier acquired
Jan 30 02:38:56 pi-hole dhcpcd[444]: wlan0: IAID eb:ff:81:37
Jan 30 02:38:56 pi-hole dhcpcd[444]: wlan0: adding address ...
Jan 30 02:38:56 pi-hole avahi-daemon[257]: Joining mDNS multicast group on interface wlan0.IPv6 with address ...
Jan 30 02:38:56 pi-hole avahi-daemon[257]: New relevant interface wlan0.IPv6 for mDNS.
Jan 30 02:38:56 pi-hole avahi-daemon[257]: Registering new address record for ... on wlan0.*.
Jan 30 02:38:56 pi-hole dhcpcd[444]: wlan0: probing address 192.168.0.x/24
Jan 30 02:38:57 pi-hole dhcpcd[444]: wlan0: soliciting an IPv6 router
Jan 30 02:39:01 pi-hole dhcpcd[444]: wlan0: using static address 192.168.0.x/24
Jan 30 02:39:01 pi-hole avahi-daemon[257]: Joining mDNS multicast group on interface wlan0.IPv4 with address 192.168.0.x.
Jan 30 02:39:01 pi-hole dhcpcd[444]: wlan0: adding route to 192.168.0.0/24
Jan 30 02:39:01 pi-hole dhcpcd[444]: wlan0: adding default route via 192.168.0.1
Jan 30 02:39:01 pi-hole avahi-daemon[257]: New relevant interface wlan0.IPv4 for mDNS.
Jan 30 02:39:01 pi-hole avahi-daemon[257]: Registering new address record for 192.168.0.x on wlan0.IPv4.
I don't see anything amiss in dmesg..
Can anyone suggest where I should be looking (presumably logs) to try and find the issue ?
Thanks