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Context

I have purchased a new Dell XPS L502x laptop which has Windows 7 Home 64-bit which has this Wi-Fi Option: Intel ® Centrino ® Advanced-N 6230 (2x2 agn + Bluetooth)

And I have 4 Mbps Internet connection with a D-Link DIR-655 Wireless router.

Problem

When I use internet on my laptop by wired LAN it works very good very fast. But when I use internet on Wi-fi it works very slow, and most of the time it doesn't work properly.

Any solution for this?

Screenshot 1

This is screenshot of Wireless Router setting:

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Screenshot 2

Of Device Manager:

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Screenshot 3

Network setting folder:

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Please tell me if you need any information to solve this issue.

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3 Answers

up vote 0 down vote accepted

In my XPS L502X I have been facing the similar problem, my WiFi was dead slow. I had to contact the dell support to resolve my issue.

Go to Control Panel

Power Options

Select Power Plan - check DELL

Change Plan Settings

Change Advanced Power Settings

a pop up comes in on the screen

Expand the - Wireless Adapter Settings

Expand the - Power Saving Mode

Change - On Battery To Maximum Performance - Plugged In To Maximum Performance Restart your system and now your WiFi will work perfectly

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Thanks. problem Solved now –  metal gear solid Jul 17 '11 at 9:25
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There's a couple of things I've noticed in regards to wi-fi on laptops which may help.

  • Running NetStumbler to scan for other wireless networks on the same channel is a good idea. It might be an idea to try other wireless channels.
  • It might be just me but I've found a lot of wireless adapters built-in to laptops to be of variable quality - it might be a fault; is the experience consistent with every network you connect to?
  • Obviously check your Windows updates are applied and check for any driver updates.
  • Sometimes certain brands of router and adapter just don't work together very well.
  • DECT cordless phones and video senders are reputed to cause chaos with wireless networks.
  • A known issue with the Dell L502x XPS 15 is the factory installation of the wireless antennae - Unscrew the customer access panel and check if the antennae are correctly connected to the wifi module. This can be done without voiding warranty.

If the experience is consistent regardless of which wireless network you connect to, my guess is that the wireless LAN adapter is at fault. Also, internally the antenna is a wire loop that generally goes around the edges of the screen, if there is a break in the wire, it will also affect your connection performance significantly.

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Bluetooth and WiFi use the same frequency can interfere with each other. Try disabling Bluetooth, it solved all my WLAN-issues.

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