Comment 11 for bug 732539

Problem still happens with 2.6.34.7-56.fc13.i686.PAE. Probably related: when the system goes on standby, the ethernet port turns off briefly then turns back on in low-speed mode, probably for WOL purposes.

The kernel messages on resume associated with the network driver are as follows:
r8169 0000:03:03.0: PME# enabled
r8169 0000:03:03.0: restoring config space at offset 0x5 (was 0x0, writing 0xdf9fff00)
r8169 0000:03:03.0: restoring config space at offset 0x4 (was 0x1, writing 0xdc01)
r8169 0000:03:03.0: restoring config space at offset 0x3 (was 0x0, writing 0x4008)
r8169 0000:03:03.0: restoring config space at offset 0x1 (was 0x2b80000, writing 0x2b00117)
r8169 0000:03:03.0: PME# disabled
r8169 0000:03:03.0: eth0: link up

NetworkManager verbiage:
wake requested (sleeping: yes enabled: yes)
<info> waking up and re-enabling...
<info> (eth0): now managed
<info> (eth0): device state change: 1 -> 2 (reason 2)
<info> (eth0): bringing up device.
<info> (eth0): preparing device.
<info> (eth0): deactivating device (reason: 2).
<info> (eth0): carrier now ON (device state 2)
<info> (eth0): device state change: 2 -> 3 (reason 40)
<info> Activation (eth0) starting connection 'System eth0'
<info> (eth0): device state change: 3 -> 4 (reason 0)
[...]