On 01/12/2012 08:11 AM, Markus Königshaus wrote:
Hello, I am using a USB WLAN - Stick with Realtek 8192 kernel driver. After plugging it works fine, connecting to a WPA - network works. After ifdown wlan0, ifup wlan0 the stick no longer works , it stucks on scanning. Only a modprobe -r rtl8192cu; modprobe rtl8192cu fixes the problem. The problem only appear if more than one wireless - network is in range.The problem appear only in connection with the rtl8192cu driver, other USB - sticks (with different Chipset) and other PCIE - boards operate properly. In order to reproduce the behavior repeat the sequenceifdown wlan0, ifup wlan0 a few times. wpa_cli status-> Selected interface 'wlan0' wpa_state=SCANNING < no change after 10 minutes> dmesg -> rtl8192cu: MAC auto ON okay! rtl8192cu: Tx queue select: 0x05 rtl8192c_common: Loading firmware file rtlwifi/rtl8192cufw.bin wlan0: authenticate with 00:08:54:9a:b2:5f (try 1) wlan0: authenticated wlan0: associate with 00:08:54:9a:b2:5f (try 1) wlan0: RX AssocResp from 00:08:54:9a:b2:5f (capab=0x411 status=0 aid=1) wlan0: associated < ifdown wlan0 > wlan0: disassociated from 00:08:54:9a:b2:5f (Reason: 14) wlan0: deauthenticating from 00:08:54:9a:b2:5f by local choice (reason=3) cfg80211: Calling CRDA for country: US rtl8192cu: MAC auto ON okay! rtl8192cu: Tx queue select: 0x05 rtl8192c_common: Loading firmware file rtlwifi/rtl8192cufw.bin < ifup wlan0 > rtl8192cu: MAC auto ON okay! rtl8192cu: Tx queue select: 0x05 rtl8192c_common: Loading firmware file rtlwifi/rtl8192cufw.bin cat /sys/class/net/wlan0/carrier -> 0 cat /sys/class/net/wlan0/operstate -> down Kernelversion: 3.1.8 modinfo rtl8192cu-> filename: kernel/drivers/net/wireless/rtlwifi/rtl8192cu/rtl8192cu.ko description: Realtek 8192C/8188C 802.11n USB wireless author: Larry Finger <Larry.Finger@xxxxxxxxxxxx> author: Georgia <georgia@xxxxxxxxxxx> license: GPL vermagic: 3.1.8-WuT preempt mod_unload ARMv5 firmware: rtlwifi/rtl8192cufw.bin depends: rtlwifi,rtl8192c-common lsusb -> Bus 001 Device 001: ID 1d6b:0002 Bus 001 Device 003: ID 0bda:8176
I will try to duplicate your results; however,there are two things I would like you to try. First is to get a copy of the bleeding-edge compat-wireless code, build and install the package, and test to see if it still fails. If it does, I want you to load the driver with a 'debug=4' option. In other words, use
modprobe -v rtl8192cu debug=4 Then, after a failure occurs, send me the output of a dmesg command. Larry -- To unsubscribe from this list: send the line "unsubscribe linux-wireless" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
