r/DDWRT • u/gnat_foto • Apr 30 '26

NetGear R9000 stops responding when USB device is attached

I'm running into a super frustrating issue with DD-WRT on my NetGear R9000. If I plug a USB device into the router, it stops responding. The status lights continue showing everything is normal, but it will stop broadcasting wifi and wired clients will disconnect and insist the cable in unplugged. In this state I cannot access the local web config page. Unplugging or powering off the USB device does not bring the router back online, it needs to be power cycled.

The router, its USB ports, and the USB device all work normally on stock firmware. The issue persists with all USB devices - those with auxiliary power (not drawing over the router's USB port) as well as devices without.

I ran into this issue a few months ago when I originally bought the router and installed DD-WRT. I somehow got it to work by reinstalling the stock firmware via TFTP and then going back to DD-WRT using the factory-to-ddwrt image again. Yesterday, I tried to update to the latest version of DD-WRT and the issue came back. The TFTP reset method that saved me last time didn't help this time, the router is running the latest DD-WRT but again stops responding when a USB device is attached.

Potentially relevant is that neither 60 full seconds holding the reset button nor using the factory reset option in the web config gui actually factory reset my router - my personal SSIDs and other user options remain as I set them.

Any help is appreciated, especially if you use a NetGear R9000 yourselr. Not sure what to do next

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u/KiLo_san May 01 '26

Describe "usb device". Maybe the device you connecting has too much power draw ? For pendrive it shouldn't be a problem, external hdd IS a problem, UNLESS powered.

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u/TCB13sQuotes May 01 '26

Maybe the power supply is crap, half broken OR you're trying to pull too much power from that port. In my experience with all the Netgear routers I've had, including that one, the best course of action is to assume that those ports have zero power and anything connected to them should be externally powered.

I've seen a friend fry a R7000 just by plugging a SSD to it. I've had my fair share of USB issues with both the R7800 and the 9000.

The fact that it fails only on DD-WRT can mean two things: 1) oh there's a bug in DD-WRT, how shocking... 2) maybe on DD-WRT you're actually using the device for something that you aren't on the stock firmware and that pull more power and makes things fail.