RELENG_7 hangs on boot w/Gigabyte MA78GM-S2H MB

Bob Willcox bob at
Sat Sep 20 14:45:14 UTC 2008

On Sat, Sep 20, 2008 at 07:04:56AM -0700, Jeremy Chadwick wrote:
> On Sat, Sep 20, 2008 at 08:24:29AM -0500, Bob Willcox wrote:
> > > 1) It would be helpful to know if you installed i386 or amd64 FreeBSD,
> > 
> > This is amd64 on this particular machine.
> > 
> > > 2) With regards to the lock-up after "mount root", if you press NumLock
> > > or CapsLock, do the keyboard LEDs turn on/off?
> > 
> > Nope, no keys do anything. You must either push reset or pull the plug.
> Is it possible to get the output when booting in verbose mode?  If not,
> what are the last few lines before the machine locks up when booting
> verbosely?

Yep, just did that. The last things printed right before hang are:

ioapic0: Assigning ISA IRQ 1 to local APIC 0
ioapic0: Assigning ISA IRQ 4 to local APIC 1
ioapic0: Assigning ISA IRQ 6 to local APIC 2
ioapic0: Assigning ISA IRQ 7 to local APIC 0
ioapic0: Assigning ISA IRQ 9 to local APIC 1
ioapic0: Assigning ISA IRQ 12 to local APIC 2
ioapic0: Assigning ISA IRQ 14 to local APIC 0
ioapic0: Assigning ISA PCI 16 to local APIC 1
ioapic0: Assigning ISA PCI 17 to local APIC 2
ioapic0: Assigning ISA PCI 18 to local APIC 0
ioapic0: Assigning ISA PCI 19 to local APIC 1
ioapic0: Assigning ISA PCI 22 to local APIC 2
trying to mount root from ufs:/dev/ad4s1a
start_init: trying /sbin/init
[hung at this point]

> > > 3) Many others have seen the hanging/lock-up after "mount root".  I
> > > believe one found a workaround by setting ATA_STATIC_ID in their kernel
> > > configuration.  I realise this is a problem when you can't get the
> > > system up to a point of building a kernel; chicken-and-egg problem,
> > 
> > Well, I can build a kernel if I run the 7.0-release kernel. That's how I
> > got to 7-stable on the machine in the first place. I used "sneaker net"
> > to copy it to this one via a CD (as I mentioned, the 7.0 kernel boots
> > but the Realtek ethernet device is not recognized).
> So the problem is that 7.0-RELEASE works fine for you, but after
> upgrading your RELENG_7 source (to what is now 7.1-BETA), the machine
> hangs after printing the mount root message.  Is this correct?

Yes, that is pretty much it. The Realtek ethernet isn't working in in
7.0-RELEASE either, but I'm guessing that that is a different (and less
serious) problem related to changes in that device.

> Here's another question: does booting into single-user exhibit the same
> problem as multi-user?

It looks like when I try a single-user mode (and verbose) boot the only
difference is that the las line shown above (the start_init line) isn't
printed. Otherwise, the hang is the same.

> > > 4) The Realtek NIC on that motherboard is probably too new to be
> > > supported under RELENG_7.  Realtek has a history of releasing different
> > > sub-revisions of the same NIC/PHY, and the internal changes are severe
> > > enough to cause the NIC to not work correctly (under any OS) without
> > > full driver support for that specific sub-revision.
> > 
> > That's what I suspected. The values displayed when doing a "pciconf -lv"
> > are similar as for this system I'm using to type this, but now that
> > I look closer and make a direct comparison, the failing device has a
> > rev=0x02 vs. rev=0x01 for the working one. The pciconf -lv output for
> > the failing mb is:
> > 
> > none3 at pci0:2:0:0: class=0x020000 card=0xe0001458 chip=0x816810ec rev=0x02 hdr=0x00
> >     vendor     = 'Realtek Semiconductor'
> >     device     = 'RTL8168/8111 PCI-E Gigabit Ethernet NIC'
> >     class      = network
> >     subclass   = ethernet
> Regarding the Realtek issue: I've CC'd PYUN Yong-Hyeon (surname in
> caps), who maintains the re(4) driver for FreeBSD.  He might have a
> patch available for you to try, or help determine how to get this NIC
> working on FreeBSD.  He'll probably need more than just pciconf -lv
> output, but should be able to work with you.

Ok, that'd be great. I must say that I'm close to simply returning this
MB and going with something not quite so new that is more likely to
work. I was hoping to get this system up and running this weekend. :(


> Thanks!
> -- 
> | Jeremy Chadwick                                jdc at |
> | Parodius Networking              |
> | UNIX Systems Administrator                  Mountain View, CA, USA |
> | Making life hard for others since 1977.              PGP: 4BD6C0CB |

Bob Willcox              All the evidence concerning the universe
bob at           has not yet been collected, so there's still hope.
Austin, TX

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