I have had an Alienware 16 Aurora AC16250 for a little over a year, and it worked normally until recently. Now, while gaming, I get recurring packet-loss spikes of roughly 20–40%. The problem follows a pattern: about 10 seconds of packet loss every 30 seconds.
It happens over both Wi‑Fi and Ethernet. The wired adapter is a Realtek PCIe GbE Family Controller. I have restarted the computer and network adapter, checked the cables, contacted Spectrum, tried a replacement network device from the provider, installed all available manufacturer updates, run the manufacturer's hardware diagnostics, disabled and re-enabled the adapter, checked for driver updates, and released and renewed my IP address. Spectrum says their service is working correctly.
I have opened a support request with Dell, but I would also like to troubleshoot this myself. Could this be a hardware problem with the laptop, network equipment, or something else? What tests or adapter settings should I try before opening up the computer?
4 Answers
Use continuous pings to isolate where the loss starts. First find your router’s gateway address with `ipconfig`, then run `ping -t `. You can also test a larger packet with `ping -t -l 1400 `. If packets are lost when pinging the router, the issue is between the laptop and local network. If the router stays stable but an external address loses packets, investigate the modem, ISP connection, or routing. Compare the results with another device on the same network and test a different network if possible.
Try the laptop on a completely different network, such as a friend’s connection or a public hotspot. If the same timed packet-loss pattern occurs there, the laptop becomes much more suspicious. If it disappears, focus on your router, modem, or local network equipment.
I have not tested it on another network yet, but I’ll try that to help narrow down whether the problem follows the laptop.
In the Realtek adapter’s advanced properties, try disabling Auto Disable Gigabit or Auto MDI-X if those options are available. You can also temporarily force a specific Speed & Duplex setting instead of Auto Negotiation, such as 1.0 Gbps Full Duplex or 100 Mbps Full Duplex. Test one change at a time and restore the original setting if it does not help.
Before taking the laptop apart, test with a separate USB Wi‑Fi adapter or another external network adapter. It is not a guaranteed fix, but if the problem disappears, that points toward the built-in adapter or its driver. Since the issue affects both Wi‑Fi and Ethernet, though, a shared network or system-level cause may be more likely than one failed NIC.
I wasn’t sure which command to use, so I’ll start with `ipconfig` to find the gateway and then run the continuous ping tests.