Gentoo Archives: gentoo-user

From: ABCD <en.ABCD@×××××.com>
To: gentoo-user@l.g.o
Subject: [gentoo-user] Re: Capture dmesg output on boot?
Date: Tue, 12 May 2009 06:59:07
Message-Id: gub6n1$a1r$1@ger.gmane.org
In Reply to: [gentoo-user] Capture dmesg output on boot? by Dan Cowsill
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4 Dan Cowsill wrote:
5 > Hello list,
6 >
7 > I've been trying to get to the bottom of my recent troubles with my IDE
8 > controller working with the 2.6.28 kernel. Now, linux never boots
9 > without a kernel panic, so dmesg never gets logged... Is there any way
10 > to have the kernel dump the boot log somewhere? I'd settle for
11 > scrolling up, really.
12 >
13 > Thanks,
14 > Dan
15 >
16
17 If it panics on attempting to mount the root file system, then you
18 probably would be able to use the S-PgUp if you give the "rootwait" or
19 "rootdelay=<#>", where "<#>" is a number of seconds. "rootwait" would
20 tell the kernel to wait until it really thinks it can mount the root
21 filesystem before mounting it; "rootdelay=10" would tell the kernel to
22 wait 10 seconds before mounting. Either way, you may be able to scroll
23 up during the delay (I don't remember if it initializes the keyboard
24 driver before or after the root filesystem, it's been a while since I've
25 had to debug that part of startup).
26
27 - --
28 ABCD
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