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Dell Inspiron 15R N5110 + Intel 6230 wifi + TP-Link router 40MHz channel width issues
In my parents's house there are two TP-Link access points and there are multiple devices using them without problems. However my Dell Inspiron N5110 laptop with upgraded dual-band Intel Centrino 6230 wifi card occasionally is having issues in form of very low or unstable bandwidth, high latency if network is set to 40 MHz channel width. I haven't observed slower-than-expected Intel adapter performance when using other wifi networks/access points, that would indicate issues with TP-Link router firmware, also all the other devices at parents house have no issues(Windows, Mac laptops, multiple Android tablets and phones). There fore I am leaning to think it is a Intel driver issue.
Routers (with latest firmware) positioned to receive sufficient cooling:
Problematic pc - Dell Inspiron 15R 5110 with Intel 6230 wifi, Windows 8.1 Pro x64. Wifi driver 15.11.0.7 (updated to most reacent in attempt to fix issues)
I experience issues even when I am located few meters from the router without no obstacles. There is very little interference from other networks, there are two which are barely detectable from neighboring houses. If the access points are set to 20 MHz channel width, the wifi connection with my PC is reasonable, however, generally still about 2x slower than on other devices.
I contacted both TP-Link and Intel. TP-Link suggested to contact Intel as the manufacturer of the adapter. Intel is directing me to Dell, saying that there might be manufacturer specific integration quirks that prevent adapter from working correctly.
My warranty has ended a half a year ago, so I cannot contact Dell support. Can there be any specific integration quirks that prevent the adapter from working with these particular access points in 40 MHz mode? Any idea what could be the cause for this?
Intel support also provide links below with optimal settings and possible fixes for common issues. I had done and tried all of that already before contacting Intel.
ieee488
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January 1st, 2015 10:00
Instead of fighting the issue, I would suggest buying a miniature USB wifi adapter $15.
voldemarz
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January 1st, 2015 17:00
I get by using 20 MHz width channels, then it works decently enough. It's not worth purchasing an adapter for this single problematic case. However, if there's an issue, I want to see manufacturers addressing it.
This adapter actually is supported for this laptop, e.g. Intel cannot claim unsupported integration. Here's a Window 8 driver on Dell site http://www.dell.com/support/home/us/en/04/Drivers/DriversDetails?driverId=3KV52&fileId=3103977546&osCode=W864&productCode=inspiron-15r-n5110&categoryId=NI