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Full Discussion: Kexec with Live USB/CD
Operating Systems Linux Kexec with Live USB/CD Post 302475879 by al0x on Tuesday 30th of November 2010 07:12:58 AM
Old 11-30-2010
Quote:
Originally Posted by Corona688
Wow, "ALERT! does not exist" has to be the most useless error message I've ever heard. Smilie You have my sympathies.

Do you know what script produces that? Look inside that script and see what it was looking for. Maybe it's expecting some previously unknown variable and not getting it. Maybe it's supposed to print something between alert and does...

Please also review my earlier suggestions. looking in /sys/, fiddling with rootdelay, putting in sleep, etc. I'd add to that, building usb-storage into the kernel instead of making it a module.
I don't know which script produces that, it's part of the booting process of a Lubuntu Live USB-Stick (10.04) made with the universal USB installer. I'm not very familiar with this process...
I tried rootdelay but it didn't work, I'm trying sleep and other similar commands right now...

edit: here is what I tried:
Code:
kexec -l /media/usb/casper/vmlinuz --append="ro root=/dev/sdb1 rootdelay=20 rootwait" --initrd="/media/usb/casper/initrd.lz" --ramdisk="/media/usb/casper/initrd.lz" --real-mode -d
kexec -d -e

still doesn't work...
Everything seems mounted and working fine, every driver needed as loaded and it should just start the desktop...
I looked in /sys/class/block/ and there was a sdb and sdb1 folder whith all the stats my USB-Stick has, so I'm pretty sure /dev/sdb1 is the Stick from which I'm booting

Last edited by al0x; 11-30-2010 at 10:27 AM..
 

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lsusb(8)							Linux USB Utilities							  lsusb(8)

NAME
lsusb - list all USB devices SYNOPSIS
lsusb [options] DESCRIPTION
lsusb is a utility for displaying information about all USB buses in the system and all devices connected to them. To make use of all the features of this program, you need to have Linux kernel 2.3.15 or newer which supports the /proc/bus/usb interface. OPTIONS
-v Tells lsusb to be verbose and display detailed information about all devices. -vv Tells lsusb to be very verbose and display even more information (actually everything the PCI device is able to tell). -s [[<bus>]:][<devnum>]] Show only devices in specified bus and devnum. -d [<vendor>]:[<product>] Show only devices with specified vendor and product ID. Both ID's are given in hexadecimal and may be omitted. -p <procpath> Use another path instead of /proc/bus/usb. -D <device> Do not scan the /proc/bus/usb directory, instead display only information if the device whose device file is given. -t Tells lsusb to dump the physical USB device hierarchy as a tree. FILES
/usr/share/hwdata/usb.ids A list of all known USB ID's (vendors, products, classes, subclasses and protocols). /proc/bus/usb An interface to USB devices provided by the post-2.3.15 Linux kernels. Contains per-bus subdirectories with per-device files and a devices file containing a list of all USB devices. SEE ALSO
lspci(8) AUTHOR
Thomas Sailer, <sailer@ife.ee.ethz.ch>. usbutils-0.2 14 September 1999 lsusb(8)
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