Troubles with RTL8192CU

OYTIS · n00b Joined: 16 Aug 2010 Posts: 23

Greetings!
I decided to get a more powerful WiFi adapter for my laptop and bought a TP-WN822N device, which happened to be based on RTL8192CU. Under wicd it scans the network fine, but every time I try to connect to WPA network it says "Bad password". If I use wpa_supplicant directly, dhcpcd sometimes drops after unsuccessful waiting for carrier and sometimes produces rather strange output:

Vorlon · Posted: Mon Sep 02, 2013 10:13 pm Post subject:

I had a very similar problem. Unfortunately, I never solved it. In my case, it was a very low cost Realtek RTL8188CUS USB WiFi Dongle. Comments I read on line at Amazon said it should work. Linux recognized it, and created wlan0.

However, I could NEVER get the sucker to connect with Linux. I tried WPA, WEP, and even wide-open security. I even loaded Windows on the laptop as a test and tried the supplied driver. it worked in Windows, but not in Linux.

I thought my unit my have been defective sinece it mechanically fell apart when I pulled it from a tight USB port. The supplier sent a second unit (no charge) and it had the exact same problem.

I concluded that there was SOMETHING goofy about the realtek ROM on the chip that made it incompatible with Linux.

I ended up buying a different low-cost USB WiFi dongle, and now get internet without any trouble. But the RTL8188CUS is sitting in my parts drawer unused and lonely.
_________________
Casey Bralla
Chief Nerd in Residence
The NerdWorld Organisation

OYTIS · n00b Joined: 16 Aug 2010 Posts: 23

Actually, one of the motivations for buying this device was to get rid of buggy Realtek driver (my internal wlan tranciever is also realtek). But the same model can be based on a thousand different chips, so it's like a lottery.

OK, I updated to kernel version 3.10.7 and now it DOES get an ip address in wicd, but disconnects after a few seconds. In dmesg it looks like

Schnulli · Guru Joined: 25 Jun 2010 Posts: 320 Location: Bremen DE

the Realtek USB Dongle are problematic, reasons, often became to hot and the they start suck (sorry), driver problems and often, problems with different APś bec of Protocol differences.
Ihad some RTL Dongle running and used old drivers from the Taiwan Web Page,they worked, but not with all APś, if u cant find them there, i asked the Realtek DEV (by the way they are very friendly and Linux is welcome there

)
When u start high bandwidth usage with this dongles on a not perfectly working AP... the trouble starts

greetz