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True, there are a few messages that are too early in the boot process to capture in any normal way, and I don't remember how to capture those messages. Somewhere in the kernel it mentions this.
If there is something happening in bootup that you absolutely must see, and if it isn't going to dmesg, you'll have to resort to setting up a "serial console" (google is your friend) and capture the boot sequence on whatever machine you use for a console. I have to refer you to google (or search here at LQ) because I've never actually done it, though I know it's the standard answer to this question.
If it's critical to you, you can cut a serial cable in half and strip and twist all the same-colored wires back together except swap the TXD and RXD wires.
Last edited by Quakeboy02; 12-20-2009 at 10:06 PM.
Reason: Clarify
Distribution: M$ Windows / Debian / Ubuntu / DSL / many others
Posts: 2,339
Original Poster
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Quote:
Originally Posted by Quakeboy02
If it's critical to you, you can cut a serial cable in half and strip and twist all the same-colored wires back together except swap the TXD and RXD wires.
You can also do this by firewire, or using a USB-Debug device. Both methods require a second PC though, as well as the software that listens on the other end (on the other PC). The firewire method of course assumes you *have* a firewire port on both machines, and the USB method requires a USB Host Controller with "Debug port" functionality. Plus, the USB debug cable is about $80.00
Barring all this, you're pretty much limited to /var/log/dmesg and /var/log/messages for the most complete report.
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