Date: Fri, 1 Aug 2008 09:24:53 -0700 From: "Jack Vogel" <jfvogel@gmail.com> To: "Robert Watson" <rwatson@freebsd.org> Cc: jfv@freebsd.org, freebsd-stable@freebsd.org, Martin <nakal@web.de> Subject: Re: em(4) on FreeBSD is sometimes annoying Message-ID: <2a41acea0808010924u22603c61p10e47237fad5b6fb@mail.gmail.com> In-Reply-To: <20080801154208.W6085@fledge.watson.org> References: <20080801142005.473c17ca@zelda.local> <20080801154208.W6085@fledge.watson.org>
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If the poster gives me EXACT hardware list I will see about repro'ing the problem inhouse. We do not do much of anything with laptops but I will see. Oh and a pciconf would help too. Jack On Fri, Aug 1, 2008 at 7:43 AM, Robert Watson <rwatson@freebsd.org> wrote: > > On Fri, 1 Aug 2008, Martin wrote: > >> I don't remember anymore when I reported it the first time. I think it was >> around 4.x or something like that. The em(4) bug is still there after years. >> >> Hasn't anyone really noticed yet that em(4) only appears when you boot >> FreeBSD with the interface physically attached to a switch for example? If >> you attach it later, after boot up, the interface won't power up and appear >> in the interface list (ifconfig)? > > The card range supported by the if_em driver is huge, so it wouldn't be > surprising if this is a hardware bug affecting a relatively narrow line of > parts. I've added Jack Vogel to the CC line, as he's the Intel developer > responsible for maintaining our if_em driver. I don't promise he can help > either, but it's worth a try :-). > > Robert > >> >> Steps to reproduce: >> 1) Switch your PC/laptop off. Really OFF, no reboot. >> 2) Disconnect the em(4) NIC from your switch. >> 3) Boot FreeBSD. >> 4) Plug in the ethernet cable. >> 5) Tataa! All leds at the NIC stay off. You won't be able to use em(4) >> unless you reboot your machine. >> >> Something is not being initialized properly on em(4) devices, it seems. >> >> I have had 3 of 3 em(4) NICs so far, where this bug shows up. And it's >> extremely annoying on Thinkpads, when you just want to plug in your >> laptop somewhere. >> >> -- >> Martin >> >
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