On Thu, 26 Mar 2009 15:22:36 +0100, Andriy Gapon <a...@icyb.net.ua> wrote:
on 26/03/2009 15:06 Erik Trulsson said the following:
On Thu, Mar 26, 2009 at 01:56:13PM +0100, Ronald Klop wrote:
Hello,
In the past I could catch a panic during boot via a serial cable
connected
to another computer.
My new computer only has USB-ports and ethernet. What kind of cable do
I
need now to do remote debugging?
The old computer also has usb, so I think the connection should be in
that
corner.
They all run 7-STABLE.
USB won't work for that purpose. It requires far too much kernel
support to
be useful after a panic.
Erik,
in fact, there is a special USB (EHCI) mode for such purposes:
http://www.coreboot.org/EHCI_Debug_Port
But that requires some special HW in addition to SW support which our
doesn't have.
BTW, Ronald, it is possible that you might have a serial header on
motherboard
which is not connected to any traditional port.
Is that this sio0 one?
sio0: configured irq 4 not in bitmap of probed irqs 0
sio0: port may not be enabled
sio0: configured irq 4 not in bitmap of probed irqs 0
sio0: port may not be enabled
sio0 at port 0x3f8-0x3ff irq 4 flags 0x10 on isa0
sio0: type 8250 or not responding
sio0: [FILTER]
sio1: configured irq 3 not in bitmap of probed irqs 0
sio1: port may not be enabled
I am going to open my computer tonight to see what is in there.
Ronald.
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