Samsung SC1200-TX problem.

Sat May 1 18:29:53 1999

Hi folks,

I have a samsung SC1200-TX rev-1a(with genuine DEC Tulip 21140 on
board)  ethernet card in a dual celeron computer. My net is 10BaseT.
The problem is that Samsung ethernet card transmits packets very
slowly, i.e. 90Kbyte-100Kbyte/sec under Linux(RH 5.2. I tried Kernel
2.2.5, 2.2.3, 2.2.2, all have the same problem), but receiving packets
seems okay(between 700kbyte-1Mbyte/sec). I tried the lastest tulip
driver(0.91), it doesn't help either. However, the ethernet card works
flawlessly under windoze( both upload and download at
800kbyte-1Mbyte/sec). 

diagnostics result is attached.

Any idea? Thank in advance!

Heling

-------------/proc/net/dev-------------------------
Inter-|   Receive                                                | 
Transmit
 face |bytes    packets errs drop fifo frame compressed multicast|bytes
   packets errs drop fifo colls carrier compressed
    lo:  252094    1911    0    0    0     0          0         0  
252094    1911    0    0    0     0       0          0
  eth0: 4639550    7874    0    0    0     0          0         0 
5964987    8181 2441    0    0  1360    2441          0

------------------------------------------
tulip-diag.c:v1.10 4/12/99 Donald Becker (becker@cesdis.gsfc.nasa.gov)
Index #1: Found a Digital DS21140 Tulip adapter at 0xd000.
Digital DS21140 Tulip chip registers at 0xd000:
  ffa08000 ffffffff ffffffff 00fff810 00fffa10 fc660000 320e2002
ffffebef
  e0000000 fffd83ff ffffffff fffe0000 ffffff80 ffffffff 1c09fdc0
fffffec8
 Port selection is MII, half-duplex.
 Transmit started, Receive started, half-duplex.
  The Rx process state is 'Waiting for packets'.
  The Tx process state is 'Idle'.
  The transmit threshold is 128.
EEPROM contents:
  1099 1100 0000 0000 0000 0000 0000 0000
  00e0 0103 4000 a205 830b 1e00 0000 0800
  0100 018c 0000 0000 e078 0001 0050 0018
  0000 0000 0000 0000 0000 0000 0000 0000
  0000 0000 0000 0000 0000 0000 0000 0000
  0000 0000 0000 0000 0000 0000 0000 0000
  0000 0000 0000 0000 0000 0000 0000 0000
  0000 0000 0000 0000 0000 0000 0000 f311
 ID CRC 0xe0 (vs. 0xe0), complete CRC 7730f215.
Ethernet MAC Station Address 00:40:05:A2:0B:83.
EEPROM transceiver/media description for the Digital DS21140 Tulip
chip.
Leaf node at offset 30, default media type 0800 (Autosense).
 CSR12 direction setting bits 0x00.
 1 transceiver description blocks:
  Media MII, block type 1, length 12.
   MII interface PHY 0 (media type 11).
    No MII reset sequence.    No MII initialization sequence.
    Media capabilities are 7800, advertising 01e1.
    Full-duplex map 5000, Threshold map 1800.
 MII PHY found at address 0, status 0x782d.
 MII PHY #0 transceiver registers:
   1000 782d 7810 0001 01e1 0021 0000 0000
   0000 0000 0000 0000 0000 0000 0000 0000
   0000 0000 4000 0000 2009 0010 0000 0002
   0001 0000 0000 0000 0000 0000 0000 0000.
 Basic mode control register 0x1000: Auto-negotiation enabled.
 Basic mode status register 0x782d ... 782d.
   Link status: established.
   Capable of  100baseTx-FD 100baseTx 10baseT-FD 10baseT.
   Able to perform Auto-negotiation, negotiation complete.
 Vendor ID is 1e:04:00:--:--:--, model 0 rev. 1.
   Vendor/Part: Level One LXT971.
 I'm advertising 01e1: 100baseTx-FD 100baseTx 10baseT-FD 10baseT
   Advertising no additional info pages.
   IEEE 802.3 CSMA/CD protocol.
 Link partner capability is 0021: 10baseT.
   Negotiation did not complete.

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