realtek usb wifi based on "rtl8192cu"

Hi friends,
on realtek usb wifi based on "rtl8192cu",
using kernel 3.8.3.x or 3.8.6 the device seem work good, but is unable to connect. Infinitely it ask me the wep/wpa key..

I've tested using kernel "Linux 3.8.3-103.fc17.x86_64 #1 SMP Mon Mar 18 15:46:01 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux" and 3.8.6 vanilla (from kernel.org)

Asking to Larry Finger he says that from kernel 3.8.5 this issues is fixed, but is not so, for my experience.

lsusb:
Bus 001 Device 003: ID 0bda:8178 Realtek Semiconductor Corp. RTL8192CU 802.11n WLAN Adapter

many thanks

Davide
Italy

cosmogoniA
cosmogoniA<http://www.cosmogonia.org/>
noprovarenofareononfarenonc'èprovare

If 3.8.6 does not fix it, then try the kernel from the wireless-testing git tree. There were a number of other fixes in the code that will go into kernel 3.10, and my rtl8192cu devices (3 different models) work fine here with that kernel. Unfortunately, those changes are not yet available in a compat-drivers release.

Otherwise, you need to produce more definitive logging of what is failing.

Larry

Larry Finger ha scritto:

Hi Larry,
i've tryed with kernel "3.8.5-201.fc18" two device wireless Realtek usb:

no one of this work corretcly with kernel 3.8.5-201 Fedora or 3.8.6 vanilla (kernel.org) eitherdo not connect to the wifi router, but they both see the wireless networks

one of this, on kernel 3.2.x and 3.0. 8 vanilla (kernel.org) using the Realtek driver work correctly:

Bus 001 Device 003: ID 7392:7811 Edimax Technology Co., Ltd EW-7811Un 802.11n Wireless Adapter [Realtek RTL8188CUS] Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 2.00

  bDeviceClass            0 (Defined at Interface level)
  bDeviceSubClass         0
  bDeviceProtocol         0

bMaxPacketSize0 64
idVendor 0x7392 Edimax Technology Co., Ltd
idProduct 0x7811 EW-7811Un 802.11n Wireless Adapter [Realtek
RTL8188CUS]
bcdDevice 2.00

  iManufacturer           1 Realtek
  iProduct                2 802.11n WLAN Adapter
  iSerial                 3 00e04c000001
  bNumConfigurations      1

Configuration Descriptor:
bLength 9
bDescriptorType 2
wTotalLength 46
bNumInterfaces 1
bConfigurationValue 1
iConfiguration 0
bmAttributes 0x80
(Bus Powered)
MaxPower 500mA
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 0
bNumEndpoints 4
bInterfaceClass 255 Vendor Specific Class
bInterfaceSubClass 255 Vendor Specific Subclass
bInterfaceProtocol 255 Vendor Specific Protocol
iInterface 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x81 EP 1 IN
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0200 1x 512 bytes
bInterval 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x02 EP 2 OUT
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0200 1x 512 bytes
bInterval 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x03 EP 3 OUT
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0200 1x 512 bytes
bInterval 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x84 EP 4 IN
bmAttributes 3
Transfer Type Interrupt
Synch Type None
Usage Type Data
wMaxPacketSize 0x0040 1x 64 bytes
bInterval 1
Device Qualifier (for other device speed):
bLength 10
bDescriptorType 6
bcdUSB 2.00

  bDeviceClass            0 (Defined at Interface level)
  bDeviceSubClass         0
  bDeviceProtocol         0

bMaxPacketSize0 64
bNumConfigurations 1
Device Status: 0x0000
(Bus Powered)

------------------
this one: doesn't work neitherwith Realtek driver on kernel 3.0.8 or 3.8.6 vanilla (kernel.org)

Bus 001 Device 002: ID 0bda:8178 Realtek Semiconductor Corp. RTL8192CU 802.11n WLAN Adapter Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 2.00

  bDeviceClass            0 (Defined at Interface level)
  bDeviceSubClass         0
  bDeviceProtocol         0
  bMaxPacketSize0        64
  idVendor           0x0bda Realtek Semiconductor Corp.
  idProduct          0x8178 RTL8192CU 802.11n WLAN Adapter
  bcdDevice            2.00
  iManufacturer           1 Realtek
  iProduct                2 802.11n WLAN Adapter
  iSerial                 3 00e04c000001
  bNumConfigurations      1

Configuration Descriptor:
bLength 9
bDescriptorType 2
wTotalLength 46
bNumInterfaces 1
bConfigurationValue 1
iConfiguration 0
bmAttributes 0xa0
(Bus Powered)
Remote Wakeup
MaxPower 500mA
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 0
bNumEndpoints 4
bInterfaceClass 255 Vendor Specific Class
bInterfaceSubClass 255 Vendor Specific Subclass
bInterfaceProtocol 255 Vendor Specific Protocol
iInterface 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x81 EP 1 IN
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0200 1x 512 bytes
bInterval 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x02 EP 2 OUT
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0200 1x 512 bytes
bInterval 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x03 EP 3 OUT
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0200 1x 512 bytes
bInterval 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x84 EP 4 IN
bmAttributes 3
Transfer Type Interrupt
Synch Type None
Usage Type Data
wMaxPacketSize 0x0040 1x 64 bytes
bInterval 1
Device Qualifier (for other device speed):
bLength 10
bDescriptorType 6
bcdUSB 2.00

  bDeviceClass            0 (Defined at Interface level)
  bDeviceSubClass         0
  bDeviceProtocol         0

bMaxPacketSize0 64
bNumConfigurations 1
Device Status: 0x0000
(Bus Powered)

i will try the wireless-testing git tree and then I'll let you know,

for download the kernel source from the wireless-testing git tree is it correct this procedure?

|git clone |git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-testing.git

many thanks!

cosmogoniA
cosmogoniA<http://www.cosmogonia.org/>
noprovarenofareononfarenonc'èprovare

ok, i've tryed the wireless-testing git tree kernel (3.9.0-rc6 #1 SMP x86_64 GNU/Linux), and doesn't work. Infinitely it ask me the wep/wpa key..

any other suggestion? Module loading options?

many many thanks!

davide
italy

firma

cosmogoniA <http://www.cosmogonia.org/>
noprovarenofareononfarenonc'èprovare

That particular module has very few options - only "swenc=1" to force software encryption, and "debug=X" to set the debug level. I doubt that either would help.

What are the details of your connection? You have never told what encryption you are trying to use. I have no details of your AP make/model, and what firmware you are using in it. Are you using NetworkManager, or some other means to control the connection? If NM, what does the NM log show?

Does Fedora allow you to set the debug level in wpa-supplicant? If so, set it to -ddd and post that log.

The final thing would be to capture the over-the-air traffic with wireshark or kismet. The best results would be to use a third computer to capture the encryption handshaking.

Larry