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SubjectRe: SIS900 module detects two transceivers, picks the wrong one
On Mon, 03 Feb 2003 14:42:08 -0700, Cameron Goble <> wrote:

> I am having trouble with the SIS900 driver module v1.08.04. The module
> installs correctly and does not return an error, but ... well...
> Perhaps dmesg will explain better:
> eth0: AMD79C901 HomePNA PHY transceiver found at address 2.
> eth0: AMD79C901 10BASE-T PHY transceiver found at address 3.
> eth0: using transceiver found at address 2 as default
> eth0: SiS 900 PCI Fast Ethernet at 0xec400, IRQ 11, 00:30:67:09:53:81.
> So the network interface is a multi-function device, built onto the
> motherboard. The driver picks the HomePNA transceiver, but I want to use
> the 10BASE-T transceiver. Is there an option I can pass, or some code I
> can edit that force the driver to pick the 10BASE-T transceiver at
> address 3?

There is no such option, unfortunately. The driver attempts to find a
transceiver with a link up, and uses that as a default. If it can't find
any, then it defauls to using the HomePNA (type HOME) transceiver.

So you have two choices:

1. make sure the interface is connected to a hub/switch when the driver

or, if that doesn't work:

2. apply the following patch to the driver:

--- sis900.c.old Mon Aug 26 14:43:22 2002
+++ sis900.c Mon Feb 3 21:59:26 2003
@@ -513,6 +513,9 @@
u16 mii_status;
int i;

+ if (phy_addr == 2)
+ continue;
mii_phy = NULL;
for(i = 0; i < 2; i++)
mii_status = mdio_read(net_dev, phy_addr, MII_STATUS);
It's a crude hack, but it ought to work on your box.


It is better to keep your mouth shut and be thought a fool,
than to open it and remove all doubt.
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