Problems with rtl8192cu driver (disassociated from ... (Reason: 2))

Problems with rtl8192cu driver (disassociated from ... (Reason: 2))

[Manuel Reimer]

Hello,

I'm trying to get access to a WLAN access point using the following adapter:

<http://www.edimax.com/edimax/merchandise/merchandise_detail/data/edimax/global/wireless_adapters_n150/ew-7811un>

I've used "NetworkManager" to connect to the access point and everything 
seemed to work well at first.

But after a few minutes the connection is lost with the following 
message in dmesg:

wlan0: disassociated from XX:XX:XX:XX:XX:XX (Reason: 2)

If I restart NetworkManager, then the connection works again, but only 
for a few minutes before I get another disconnect.

I even tried to do a permanent ping to a server on the Internet (to have 
permanent traffic) but this doesn't change anything. I still get 
disconnected with "Reason 2".

Are there known problems with the rtl8192cu driver?

Can someone here recommend a small USB WLAN adapter which is known to 
work without problems?

Thank you very much in advance.

Greetings

Manuel

Re: Problems with rtl8192cu driver (disassociated from ... (Reason: 2))

[Steve Brown]

On Sun, 2014-08-03 at 01:29 +0200, Manuel Reimer wrote:
> Hello,
> 
> I'm trying to get access to a WLAN access point using the following adapter:
> 
> <http://www.edimax.com/edimax/merchandise/merchandise_detail/data/edimax/global/wireless_adapters_n150/ew-7811un>
> 
> I've used "NetworkManager" to connect to the access point and everything 
> seemed to work well at first.
> 
> But after a few minutes the connection is lost with the following 
> message in dmesg:
> 
> wlan0: disassociated from XX:XX:XX:XX:XX:XX (Reason: 2)
> 
> If I restart NetworkManager, then the connection works again, but only 
> for a few minutes before I get another disconnect.
> 
> I even tried to do a permanent ping to a server on the Internet (to have 
> permanent traffic) but this doesn't change anything. I still get 
> disconnected with "Reason 2".
> 
> Are there known problems with the rtl8192cu driver?
> 
> Can someone here recommend a small USB WLAN adapter which is known to 
> work without problems?
> 
> Thank you very much in advance.
> 
> Greetings
> 
> Manuel
> 
I had a similar problem with this driver. After a while, the aggregation
session seems to hang. If I connect as b/g, no problem. If I disable
aggregation by patching the driver, again the problem goes away.

That's as far as I got.

Steve

Re: Problems with rtl8192cu driver (disassociated from ... (Reason: 2))

[Manuel Reimer]

On 08/03/2014 02:13 PM, Steve Brown wrote:
> I had a similar problem with this driver.

Thank you very much for this feedback.

Searching for 'rtl8192cu "Reason 2"' on the net reveals more cases for 
such problems. For example:

https://dev.openwrt.org/ticket/15342
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1220007
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=661860

So in other words: Seems like rtl8192cu driver is broken.

And as I am unable to fix it, I'll have to try to find a WLAN interface 
with better Linux support.

> After a while, the aggregation
> session seems to hang. If I connect as b/g, no problem. If I disable
> aggregation by patching the driver, again the problem goes away.

What exactly is "b/g"?

Greetings,

Manuel

Re: Problems with rtl8192cu driver (disassociated from ... (Reason: 2))

[Steve Brown]

On Sun, 2014-08-03 at 17:02 +0200, Manuel Reimer wrote:
> On 08/03/2014 02:13 PM, Steve Brown wrote:
> > I had a similar problem with this driver.
> 
> Thank you very much for this feedback.
> 
> Searching for 'rtl8192cu "Reason 2"' on the net reveals more cases for 
> such problems. For example:
> 
> https://dev.openwrt.org/ticket/15342
> https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1220007
> https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=661860

> 
> What exactly is "b/g"?
> 
I was referring to the 802.11b and 802.11g IEEE lan standards.

> Greetings,
> 
> Manuel
>