Since some weeks I experience problems after resuming my laptop from standby:
it takes a variable number of attempts to establish the Ethernet connection. It didn’t do that before, but I don’t know when exactly that behaviour started.
I changed the switch port to which the device is connected, but without any improvement. Therefore I think it is not a switch problem, but device related.
I don’t experience that behaviour on the other ubuntu-based machines in my network.
What can I do to troubleshoot the problem?
It is a Lenovo ThinkPad T61 with a “Intel Corporation 82566MM Gigabit Network Connection”.
lspci -v shows
00:19.0 Ethernet controller: Intel Corporation 82566MM Gigabit Network Connection (rev 03) Subsystem: Lenovo ThinkPad T61/R61 Flags: bus master, fast devsel, latency 0, IRQ 32 Memory at fe000000 (32-bit, non-prefetchable) [size=128K] Memory at fe025000 (32-bit, non-prefetchable) [size=4K] I/O ports at 1840 [size=32] Capabilities: <access denied> Kernel driver in use: e1000e Kernel modules: e1000e