I will forward your inquiry to Wifi support. thank you.
Wireless connectivity issues can be caused by many reasons. Please apply the following actions as they may resolve this type of issue:
- Contact TP-LINK Support and and make sure you are using the most recent firmware version for your Wireless Router.
- Check with the Computer Manufacturer Support and update the driver for your Intel® Centrino® Wireless-N 2230.
- Apply the configuration from the following advisory: Wireless Networking — What are the Recommended Settings for 802.11n Connectivity?
Already did all this, waiting for TPLink's respond
And sometimes after sleep mode wifi is on but dns_probe_finished_nxdomain. After disabling/enabling Intel Network devise all became ok.