Hi, > > 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. [..] After mode debugging with DBG_LOUD I found out that the difference when the driver is loaded/modprobed and ifdown/ifup to be a receive configuration register (RCR) value. On bootup/modprobe: ### Set RCR(0xf0002a0e) ### On ifdown/ifup: ### Set RCR(0xf0002ace) ### If I force RCR value to 0x2a0e in rtl92cu_set_hw_reg()inside HW_VAR_RCR case everything works ok. This seems to work with 3 different vendors USB sticks based on 8192cu chipset (Edimax, EDUP and some unknown vendor). I tried looking up the bit values meanings from that register but couldn't find a proper spec. Thanks, Nicu Pavel -- 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
