On 08/27/2013 03:40 PM, Mark Cave-Ayland wrote:
On 27/08/13 17:23, Larry Finger wrote:
Hi Larry,
I just retested and this message was posted from what lsusb says is a
"Bus 001 Device 007: ID 7392:7811 Edimax Technology Co., Ltd EW-7811Un
802.11n Wireless Adapter [Realtek RTL8188CUS]" connected to an AP using
WPA(1).
I'm actually testing a dongle from a Raspberry Pi that I've been experiencing
issues with under load with the Realtek-written 8192cu driver. My understanding
is that it is an OEM RTL8188CUS adapter from here:
http://thepihut.com/products/usb-wifi-adapter-for-the-raspberry-pi.
My kernel is 3.11.0-rc6-wl+ from the wireless-testing tree. I have built
3.11-rc7-wl+, but not yet rebooted. Before I boot into that kernel, I
will build and test the mainline kernel, but it should not make a
difference as the only code differences between wireless-testing and the
mainline trees deal with cleaning up some sparse endian issues.
What is the make/model of the AP that fails? Is its firmware the latest
available? Just to confirm, you are running WPA1 encryption.
It seems to be all of the ones I'm testing :/ Currently that's an old Netgear
DG834G, a desktop PC running Debian Wheezy/hostapd using a zd1211rw-based WiFi
dongle, and an O2 Wireless box (rebadged Thomson). The problem seems to be that
association is difficult, and even when it does associate then the AP appears to
drop out every minute or so.
The rtl8192cu firmware is that supplied with Debian Wheezy, while the AP
firmware should also be reasonably up-to-date. Access to all APs is fine using
an Android phone, the zd1211rw desktop PC and a laptop with an iwlwifi driver.
The APs are set to advertise both WPA and WPA2 encryption.
The accepted firmware has an md5sum of 943e9b714a926e630b8152d7aad91d2e for
/lib/firmware/rtlwifi/rtl8192cufw.bin.
Do you still have the wireshark file from the failed attempt? If so,
could you filter out the traffic from APs and stations other than the
units trying to make the connection, and send me (privately) the trimmed
file?
Yes - I'm not sure if it's exactly that attempt, but I do have a representative
wireshark trace of this which I will send to you privately.
For completeness, I have tested WPA2 with Netgear WNDR3300 and WNDR3400
running standard firmware, WPA1 with a Linksys WRT54GL running openWRT
Kamikaze fw, and WEP with a Linksys WRT54G V5 running standard fw.
Okay. So perhaps there is something slightly different about this particular
WiFi dongle...
Neither rtl8192cu nor 8192cu (the vendor driver) work with the 2x2 configuration
such as found in a TP-Link TL-WN8200ND V1.0. That was reported to Realtek, but I
have had no response from them.
Larry
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