The onboard ethernet controler works fine with the latest 2.6 kernel
available from the squeeze AMD 64, but does not work anymore on the
latest 3.x kernel from wheezy.
The controler is recognized like this (lspci):
02:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168B PCI Express Gigabit Ethernet controller (rev 06)
Below is the relevant part from dmesg at boot time on a kernel 3.2:
[ 1.249409] r8169 Gigabit Ethernet driver 2.3LK-NAPI loaded
[ 1.249434] r8169 0000:02:00.0: PCI INT A -> GSI 46 (level, low) -> IRQ 46
[ 1.249466] r8169 0000:02:00.0: setting latency timer to 64
[ 1.249520] r8169 0000:02:00.0: irq 72 for MSI/MSI-X
[ 1.249969] r8169 0000:02:00.0: eth0: RTL8168evl/8111evl at 0xffffc90000c6a000, 8c:89:a5:61:54:1e, XID 0c900800 IRQ 72
[ 1.249972] r8169 0000:02:00.0: eth0: jumbo features [frames: 9200 bytes, tx checksumming: ko]
...
[ 14.422267] r8169 0000:02:00.0: eth0: unable to load firmware patch rtl_nic/rtl8168e-3.fw (-2)