On my Thinkpad x100e, both wired and wireless networking fail after an arbitrary amount of time (seconds, minutes, or hours). After failure, ifconfig and iwconfig still report being connected, but network requests hang indefinitely and the machine is unreachable from others on the network. Attempting to reconnect to wired or wireless via NetworkManager results in endless cycles connecting-connected-disconnected.

This is a known issue with the wireless rtl8192se driver, but why would it also affect my wired connection? What's the next step in troubleshooting this? I've gone back to the 2.6 kernel, since 3.0 seems to exacerbate the problem.

I've tried disabling wireless by turning it off in NM and rmmod'ing rtl8192se, but that doesn't prevent the wired failures.

lspci reports wired is RTL8111/816B, and wireless is RTL8192SEvB

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