On Fri, Mar 22, 2013 at 07:07:44PM -0400, rebelyouth wrote:

02:00.0 Ethernet controller: Atheros Communications Inc.

AR8121/AR8113/AR8114 Gigabit or Fast Ethernet (rev b0)

Subsystem: ASUSTeK Computer Inc. Device 831c

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 45

Region 0: Memory at fbfc0000 (64-bit, non-prefetchable) [size=256K]

Region 2: I/O ports at ec00 [size=128]

Capabilities: <access denied>

Kernel driver in use: ATL1E

Could you show us the capabilities (running lspci -vv as root)? Please check
if ASPM is enabled and try to disable it in the BIOS.