[jackguey]

After the initial installation of DD-WRT, every device connects except the TV. I have tried several solutions I have found online, have restarted/re-booted all relevant devices multiple times, and have gone through the recommended settings in the wiki. The TV connected to the default linksys firmware, and connects to a mobile hotspot.

All other devices connect to the same 2.4 Ghz network with no issue. Ethernet is unfortunately not an option.

Background

Samsung TV NU6900; updated to latest 1292.1 firmware

Linksys WRT3200ACM
DD-WRT v3.0-r40559; now updated to v3.0-r42015
AP Mode
ath1
N-Only (2.4 GHz)
Wide HT40 (40 MHz)
WPA2-PSK (AES)
Received (RX) 100% 29340 OK, no error
Transmitted (TX) 100% 84537 OK, no error

Any suggestions would be greatly appreciated.

[pbphoto]

I have a Samsung smart TV connected via wifi without issues. My setup is similar to yours except I used NG-mixed and 20mhz channel width. I'm also running 42015. More details below.

Linksys WRT3200ACM: gateway mode, DNSMasq for DNS and DHCP, Wireguard client (Mullvad), Firewall enabled, QoS enabled HTB-CAKE, PBR enabled (SFE disabled). WIFI: 2.4ghz: NG-mixed, 20mhz channel width, channel 1, WPA2-CCMP-128. 5ghz: AC/N mixed, 80mhz channel width, channel 149+6, WPA2-CCMP-128.

Linksys WRT1900ACSv1: router mode, hardwired ethernet lan to WRT3200ACM above. WIFI: 2.4ghz: NG-mixed, 20mhz channel width, channel 11, WPA2-CCMP-128. 5ghz: AC/N mixed, 80mhz channel width, channel 36+6, WPA2-CCMP-128.

[jackguey]

Thank you for your ideas!

Changes and Results

NG-mixed: unsuccessful
above & 20mhz channel width: unsuccessful
above & channel 1: unsuccessful
above & upgraded to Firmware: DD-WRT v3.0-r42015: unsuccessful
above & TurboQAM disabled: unsuccessful

There must be something I'm missing, some setting that isn't right for Samsung...

Other current settings

Connection type DHCP (auto)
Gateway mode.
No MAC filtering.
Firewall enabled.
DNSMasq enabled.
QoS disabled.
Privoxy disabled; some ad filters enabled.
All VPN settings disabled.
Shortcut Forwarding Engine disabled.
STP disabled.
IPv6 Enabled; Native IPv6 from ISP; Prefix length 64; Radvd enabled.
DDNS disabled.
ath2 disabled.

[pbphoto]

My Samsung is an NU7100 with the latest firmware. It doesn't use DHCP - I have a hardcoded IP address with a static IP in dnsmasq on my router. My Samsung connects to my 1900ACSv1 instead of the 3200ACM because it is closer.

[NEPTUNE779]

i have some sugestion with 40mhz cts protection must be enabled and i changed dtm 2 to 1 and and drop wifi low signal -128 to -100 that did the trick for me

[James80]

I have the same TV. Everything is fine.

Btw, if You router and tv are close, you should use a cable. And you shouldn't use auto channel.. just to see, try 1-6 or 11.

Good luck

[ronmanp]

I just went from factory to DD-WRT v3.0-r42819 std (03/30/20) on my WRT1900AC and experienced the same issue.

My Sony Bravia xbr65x900f and Fire Stick wouldn't connect to 5ghz or 2.4ghz if I used "WPA2 Personal With SHA256" and AES/TKIP. However once I changed it to just "WPA2 Personal" + AES it fixed all of my issues. I find that the range of my 5ghz is not as good as it used to be on factory though but that's a different problem..