netdev - Re: sky2 negotiating only 100Mb/s (88E8055)

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Message-ID: <20130315083520.72c1fd49@nehalam.linuxnetplumber.net>
Date:	Fri, 15 Mar 2013 08:35:20 -0700
From:	Stephen Hemminger <stephen@...workplumber.org>
To:	Rafał Miłecki <zajec5@...il.com>
Cc:	Network Development <netdev@...r.kernel.org>,
	Mirko Lindner <mlindner@...vell.com>
Subject: Re: sky2 negotiating only 100Mb/s (88E8055)

On Fri, 15 Mar 2013 13:03:01 +0100
Rafał Miłecki <zajec5@...il.com> wrote:

> 2013/3/3 Rafał Miłecki <zajec5@...il.com>:
> > I've problems with my:
> > 08:00.0 Ethernet controller [0200]: Marvell Technology Group Ltd.
> > 88E8055 PCI-E Gigabit Ethernet Controller [11ab:4363] (rev 13)
> > using 3.4.28 kernel on my Sony notebook.
> >
> > I've tried connecting it to the:
> > 1) HP#1 (Intel card)
> > 2) HP#2 (Broadcom card)
> > 3) Router based on BCM4706 with BCM53125 switch
> > I've tried two different CAT5e cables for all the above devices. In
> > every case sky2 established 100Mbps link only. It couldn't achieve
> > 1000Mb/s. Forcing it to 1000Mbps broke link. Lower speeds (100 half
> > duplex and 10 Mbps) are working fine.
> >
> > It's not the issue with the cable or devices, because all other
> > configurations are working fine. I can connect:
> > 1) HP#1 with HP#2
> > 2) HP#1 with router
> > 3) HP#2 with router
> > and I always get 1000Mbps.
> >
> > So it looks like some bugged hardware or (more likely?) issue in sky2.
> >
> > sky2 0000:08:00.0: eth0: disabling interface
> > sky2: driver version 1.30
> > sky2 0000:08:00.0: Yukon-2 EC Ultra chip revision 3
> > sky2 0000:08:00.0: irq 47 for MSI/MSI-X
> > sky2 0000:08:00.0: eth0: addr 00:1d:ba:19:9e:db
> > sky2 0000:08:00.0: eth0: enabling interface
> > sky2 0000:08:00.0: eth0: Link is up at 100 Mbps, full duplex, flow control both
> >
> > Can you help me with that?


PHY stuff is black magic, and sometimes vendors break things outside
the driver. You might check for a BIOS update? Does it work with windows?
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