MII transmitter not found

[Yongling Ding]

Under RedHat 5.2 on Dell OptiPlex PII 300, 3c905B has been detected at
boot time (0.99H), but a warning message shows MII transceiver is not
found. The strange thing is two runs of diag programs generate different
outputs. It seems that it takes a while for the MII to be found. The first
run immediately after the boot shows:
Found a 3Com PCI Ethernet 3c905b rev 4 at 0xdc00.
Initial window 7, registers values by window:
  Window 0: 0000 0000 0000 0000 5555 00bf 0000 0000.
  Window 1: 0000 0000 0000 0000 0000 0000 0000 2000.
  Window 2: 1000 cd4b c9be 0000 0000 0000 000a 4000.
  Window 3: 0000 0060 05ea 0000 000a 0800 00f8 6000.
  Window 4: 0000 0000 0000 0ed2 0001 8830 0000 8000.
  Window 5: 1ffc 0000 0000 0600 0807 06de 06c6 a000.
  Window 6: 0000 0000 0000 0000 0000 0000 0000 c000.
  Window 7: 0000 0000 0000 0000 0000 0000 0000 e000.
Vortex chip registers at 0xdc00
  0xDC10: 00000000 00000000 00000093 00000000
  0xDC20: 000000a0 03407a40 00080000 00000004
  0xDC30: 00000000 4eaeb152 03407810 00080004
 No interrupt sources are pending.
 Transceiver/media interfaces available:  100baseTx 10baseT.
 MAC settings: half-duplex.
EEPROM contents:
  0010 4bcd bec9 9055 c4cd 0036 584e 6d50
  2971 0000 0010 4bcd bec9 0030 0000 002a
  32a6 0000 0000 0080 0000 0004 0000 10b7
  9055 000a 0000 0000 0000 0000 0000 0000
  00eb 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
 The word-wide EEPROM checksum is 0x2f38.
Parsing the EEPROM of a 3Com Vortex/Boomerang:
 3Com Node Address 00:10:4B:CD:BE:C9 (used as a unique ID only).
 OEM Station address 00:10:4B:CD:BE:C9 (used as the ethernet address).
 Manufacture date (MM/DD/YY) 6/13/98, division 6, product NX.
Options: .
  Vortex checksum is 83 (vs. 10b7),Cyclone checksum is eb (vs. eb).
 ***WARNING***: No MII transceivers found!

But after a while, the second run shows
Found a 3Com PCI Ethernet 3c905b rev 4 at 0xdc00.
Initial window 0, registers values by window:
  Window 0: 0000 0000 0000 0000 5555 0000 000a 0000.
  Window 1: 0000 0000 0000 0000 0000 0000 0000 2000.
  Window 2: 1000 cd4b c9be 0000 0000 0000 000a 4000.
  Window 3: 0000 0080 05ea 0000 000a 0800 0800 6000.
  Window 4: 0000 0000 0000 0012 0000 8880 0000 8000.
  Window 5: 1ffc 0000 0000 1ffc 0800 0000 0000 a000.
  Window 6: 0000 0000 0000 0000 0000 0000 0000 c000.
  Window 7: 0000 0000 0000 0000 0000 0000 0000 e000.
Vortex chip registers at 0xdc00
  0xDC10: 00000000 00000000 00000000 00000000
  0xDC20: 00000000 00000000 00080000 00000004
  0xDC30: 00000000 de1e21e2 00000000 00080004
 No interrupt sources are pending.
 Transceiver/media interfaces available:  100baseTx 10baseT.
 MAC settings: half-duplex.
EEPROM contents:
  0010 4bcd bec9 9055 c4cd 0036 584e 6d50
  2971 0000 0010 4bcd bec9 0030 0000 002a
  32a6 0000 0000 0080 0000 0004 0000 10b7
  9055 000a 0000 0000 0000 0000 0000 0000
  00eb 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
 The word-wide EEPROM checksum is 0x2f38.
Parsing the EEPROM of a 3Com Vortex/Boomerang:
 3Com Node Address 00:10:4B:CD:BE:C9 (used as a unique ID only).
 OEM Station address 00:10:4B:CD:BE:C9 (used as the ethernet address).
 Manufacture date (MM/DD/YY) 6/13/98, division 6, product NX.
Options: .
  Vortex checksum is 83 (vs. 10b7),Cyclone checksum is eb (vs. eb).
 MII PHY found at address 0, status 7869.
 MII PHY found at address 1, status 7869.
 MII PHY found at address 2, status 7869.
 MII PHY found at address 3, status 7869.
 MII PHY 0 at #0 transceiver registers:
   3000 786d 0000 0000 01e1 0020 0004 2001
   0000 0000 0000 0000 0000 0000 0000 0000
   0000 0ecf 1fdd 0000 0000 0005 2001 0000
   0000 2040 07cf 1c11 0011 1000 0000 0000.
 MII PHY 1 at #1 transceiver registers:
   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.
 MII PHY 2 at #2 transceiver registers:
   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.
 MII PHY 3 at #3 transceiver registers:
   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.