I have the same symptoms. I can kill -9 NetworkManager and restart it and everything seems to be fine at that point.
lspci says my wireless is this: Network controller: Intel Corporation PRO/Wireless 2200BG Network Connection (rev 05) and my wire (which I don't use) is this: Ethernet controller: Realtek Semiconductor Co., Ltd. RTL-8139/8139C/8139C+ (rev 10) -- NetworkManager causes high CPU-usage after suspend https://bugs.launchpad.net/bugs/154254 You received this bug notification because you are a member of Ubuntu Bugs, which is the bug contact for Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs