D-Link DGE 530-T Gigabit Ethernet Controller, unreliable

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- Using Fedora 12.
- Linux 2.6.31.5-127.fc12.x86_64 #1 SMP Sat Nov 7 21:11:14 EST 2009 x86_64 x86_64 x86_64 GNU/Linux
- Tried switching between two cards, cables, ports, switches, ethtool
  in different autoneg/1000/100 configs using all other known good
  hardware.
- skge driver gives no errors, no errors with dmesg.
- tried the first card against numerous configs and it would
  occassionally get packets through, but very very rarely.
  100mbit was slightly more likely to work than gig, and 10mbit
  never worked.
- decided first card was DOA and exchanged.  Second card behaves
  similarly to first... slightly better.  A few times it started
  working and ran for half an hour, even if link disconnected,
  reconnected, etc.  Much more likely to work at 100mbit.
- Second card, TX almost always got packet through, RX would count
  packets but seldom would kernel receive them.
- No errors showing with ifconfig.

D-Link claims card works with linux.  Hard to believe two cards in a
row would be defective in similar way unless it is a systematic
manufacturing problem.  I'm somewhat suspicious of the
driver/interrupt delivery since no errors are ever reported despite
packet count showing arrivals.

Does anyone have experience with getting this GigE adapter working?
Is it likely a defective card, or is this a problem with Fedora 12?

- Mike
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