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Kexec with Live USB/CD
Post 302475879 by al0x on Tuesday 30th of November 2010 07:12:58 AM
11-30-2010
Quote:
Wow, "ALERT! does not exist" has to be the most useless error message I've ever heard. 
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.
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 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
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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LEARN ABOUT FREEBSD
ehci
EHCI(4) BSD Kernel Interfaces Manual EHCI(4) NAME
ehci -- USB Enhanced Host Controller driver SYNOPSIS
device ehci DESCRIPTION
The ehci driver provides support for the USB Enhanced Host Controller Interface, which is used by USB 2.0 controllers. EHCI controllers are peculiar in that they can only handle the USB 2.0 protocol. This means that they normally have one or more companion controllers (i.e., ohci(4) or uhci(4)) handling USB 1.x devices. Consequently each USB connector is electrically connected to two USB con- trollers. The handling of this is totally automatic, but can be noticed since USB 1.x and USB 2.0 devices plugged in to the same connector appear to connect to different USB busses. SEE ALSO
ohci(4), uhci(4), usb(4), xhci(4) HISTORY
The ehci device driver first appeared in FreeBSD 5.1. LOADER TUNABLES
When the kernel has been compiled with options USB_DEBUG, some tunables become available that affect the behavior of ehci. These tunables can be set at the loader(8) prompt before booting the kernel or stored in loader.conf(5). hw.usb.ehci.lostintrbug This tunable enables the lost interrupt quirk. The default value is 0 (off). hw.usb.ehci.iaadbug This tunable enables the EHCI doorbell quirk. The default value is 0 (off). hw.usb.ehci.no_hs This tunable disables USB devices to attach like HIGH-speed ones and will force all attached devices to attach to the FULL- or LOW- speed companion controller. The default value is 0 (off). BSD
March 4, 2012 BSD