I discovered that the problem was not with the kernel driver for the RTL8188CUS chip. Post added at 12:24 PM - Previous post was at 08:22 AM. xhci_hcd 0000:05:00.0: ERROR no room on ep ring I don't know if it is related, but I am getting lots of these in the log: I just received kernel 3.1.7 in the latest batch of updates, so I tried again with the built-in driver, but no success. The current version of the driver on the Realtek site claims to work for kernels up to 3.0.2, but I built and installed it, and it doesn't work on kernel 3.1.6. There are lots of forum posts for various distributions indicating that people have had success with the Realtek drivers, but not since kernel 2.6.X. The driver is loaded, the networks are scanned properly, but it won't connect - it just keeps asking for the WEP key, or the WPA key on a WPA network. The drivers which come with kernel 3.1.X just don't work. Its chipset is RTL8188CUS, which seems to power many of this type of device. 64bit INF file (net8192cu.I have one of those tiny USB wifi dongles.32bit INF file (net8192cu.inf) for Realtek RTL8192CU and Windows 7.

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Realtek 8192cu driver not compiling