Ronald Klop wrote:
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
Yes. Mine (onboard) is recognized in a similar fashion:
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: <16550A-compatible COM port> port 0x3f8-0x3ff irq 4 flags 0x10 on
acpi0
sio0: type 16550A
sio0: [FILTER]
sio1: configured irq 3 not in bitmap of probed irqs 0
sio1: port may not be enabled
It actually is enabled and working...
I am going to open my computer tonight to see what is in there.
You want to look out for a 10 pin connector -- they usually look like
jumper connectors (I don't know the correct word in english, in german
it's called "Pfostenstecker"). It's even possible that it's there, but
not connected in any way -- consult the manual of your mainboard to be sure.
Regards,
Philipp
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