Comment 49 for bug 347711

I can confirm this bug on a D945GCLF2 board when running Jaunty server. It occurs when running heavy network traffic

# lspci -vvv
01:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168B PCI Express Gigabit Ethernet controller (rev 02)
        Subsystem: Intel Corporation Device 0001
        Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx+
        Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
        Latency: 0, Cache Line Size: 64 bytes
        Interrupt: pin A routed to IRQ 2300
        Region 0: I/O ports at 1000 [size=256]
        Region 2: Memory at 28100000 (64-bit, non-prefetchable) [size=4K]
        Region 4: Memory at 28000000 (64-bit, prefetchable) [size=64K]
        Expansion ROM at 28020000 [disabled] [size=128K]
        Capabilities: <access denied>
        Kernel driver in use: r8169
        Kernel modules: r8168, r8169

Solved compiling r8168 module from realteck site
HowTo --> http://ubuntuforums.org/showthread.php?t=1022411
(do make & make install as root)