Re: RTL8192CU continually reconnecting

[Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>]

On 10/09/13 16:14, Larry Finger wrote:

> Those disconnects do happen for reasons that I do not understand. They
> will be worse on your system without a network manager as it appears
> that you need to manually reconnect at that point, or at least it took a
> long time for the system to react. With NetworkManager, that reconnect
> is automatic, and relatively quick.

Okay - understood.

>> Whilst checking various parts of my kernel, I noticed for the first
>> time during
>> testing that my current kernel configuration doesn't have SMP enabled.
>> This got
>> me thinking that perhaps there are other build options which could
>> have an
>> effect on the driver. Hence I also uploaded a copy of my .config file to
>> http://www.ilande.co.uk/tmp/rtl8192cu-config in the hope that maybe
>> this can
>> help you recreate the issue locally?
>
> As I have a dual-core CPU, thus I always have SMP set. That should not
> be a problem. In fact, the concurrent operation of 2 CPUs usually causes
> more problems. I will review that configuration.

I'd definitely be interested to know if by duplicating that same 
configuration, you see the same issues that I do.

> You can now disable the logging. When the watchdog reports that contact
> with the AP has been lost, that is certainly true, and the watchdog is
> doing its job. In addition, nothing was received from any AP, which
> leads me to conclude that the receiver has locked up for some reason. I
> need to check to see what the code does to recover. Perhaps that will
> help me understand the problem. In my current run that has run for 20
> hours, I have had two disconnects for Reason 3, but more importantly, I
> have had two watchdog restarts. It does happen on my system, just a lot
> less frequently. BTW, my ping loss rate is about 3%. That is too high,
> but not as bad as yours.

Interesting. Perhaps there is something different in the initial 
programming of the radio that causes it to crash on my particular 
hardware revision? As before, please let me know if there is anything 
else you require.


ATB,

Mark.