I do like the post RTL8188CUS Wireless USB Dongle doesn't work unless I disable wireless security . But when I plug my 8192cu usb wireless card, my computer screen is off. At that time I even can not use Alt SysRq k or Alt SysRq + reisub. I compile the latest driver of 8192cu on ubuntu 12.04 with kernel 3.2.0-34. In RealTek site, I download 8192cu drive which is for Linux Kernel 2.6.18~2.6.38 and Kernel 3.0.8. But now in Ubuntu12.04 my kernel is 3.2.0-34. Every time I plug the usb 8192cu wireless card my system halts. Now I try to blacklist both the system's rtl8192cu driver and the new 8192cu driver I compile, but the system still halts when I plug the usb driver. What about you ? Thanks!