On a Dell Latitude with USB2 attached CD/DVD-ROM, I get the following errors when booting the Gentoo 2006.0 Live-CD: !! Could not find CD to boot, something else needed and later !! The root block device is unspecified or not detected
Can you try booting with: gentoo-nofb scandelay or: gentoo-nofb scandelay=20 Also check if you want to try other options (F2 to F7) on the livecd's boot prompt. Good luck, Roger
Scandelay did not change the behaviour, apart from waiting 20 secs. Note that Ubuntu (Hoary to Dapper), as well as Knoppix, does not have any problems booting on the X1. Did you ever try booting Gentoo off a USB connected CD/DVD-ROM?
I tried installing Gentoo with the new 2006.0 amd64 image on a Dell PowerEdge 1855 EM64T. This system only has a USB CD drive. 2006.0 and 2005.1 could not find/detect it. 2005.1-r1 detected it as /dev/sr0 and booted just fine. It seems that the enhancements made to 2005.1-r1 were not propagated to 2006.0...
*** Bug 124378 has been marked as a duplicate of this bug. ***
tried booting with the doscsi option?
yes, gentoo doscsi however, yesterday I booted with: gentoo doscsi scandelay debug as suggested by this link: http://forums.gentoo.org/viewtopic-t-369937-highlight-scandelay+debug.html which reads the following: [QUOTE] A post by Gordon Innes on http://bugs.gentoo.org/show_bug.cgi?id=83276#c30: Quote: Managed to get the 2005.1 minimal cd to boot on a USB CDROM with the following process: 1. Boot with "doscsi scandelay debug" (note the 'debug') 2. At the debug prompt (NOT the emergency shell prompt): # ls /dev/sr0 ls: /dev/sr0: No such file or directory # cat /proc/sys/kernel/hotplug /sbin/hotplug # echo /sbin/udev > /proc/sys/kernel/hotplug # cat /proc/sys/kernel/hotplug /sbin/udev 3. unplug the cdrom then plug it back in. 4. At prompt again: # ls /dev/sr0 /dev/sr0 # exit 5. Boot continues and finds livecd at /dev/sr0. I've tried the same procedure with the the emergency shell, however it didn't work. The important parts are the 'echo /sbin/udev > /proc/sys/kernel/hotplug' and the replugging of the cdrom. The echo sets udev as the hotplug agent for the kernel and the replug causes the kernel to send a new hotplug event to udev which in turn sets up the missing device. One way I think this can be fixed permenatly is to add the echo line to the linuxrc right after /proc is mounted. I'm going to try and build my own version of the livecd to test this. [UNQUOTE] In my specific case I think that the scandelay option was enough because when I entered debug, ls /dev/sr0 was available so I just exited and the 2006.0 livecd boot went on. Maybe the code fix posted above was integrated into 2005.1-r1 but left out in 2006.0.
Tried the 'dobladecenter' parameter yet?
(In reply to comment #7) > Tried the 'dobladecenter' parameter yet? gentoo doscsi scandelay dobladecenter ? no, didn't know it existed.
There's no need for both scandelay and dobladecenter... There's lots of options listed on the F2 through F7 help screens to assist not only in troubleshooting, but also in getting your CD to boot properly on your hardware. I'm also thinking I'm going to have dobladecenter renamed for the next release to "slowusb" or something instead, as it seems to be used more than just by the slow USB CDROM in the IBM Bladecenter.
(In reply to comment #9) > I'm also thinking I'm going to have dobladecenter renamed for the next release > to "slowusb" or something instead, as it seems to be used more than just by the > slow USB CDROM in the IBM Bladecenter. I would welcome such a rename - I recommend the 'dobladecenter' in my Gentoo LiveUSB howto as well, for all types of machines.
Yeah, it was me and genstef at FOSDEM that figured out it would work properly with "dobladecenter" on most USB devices. Anyway, I think "slowusb" sounds better, and there's less to type. ;]
*** Bug 126386 has been marked as a duplicate of this bug. ***
Here's another for dobladecenter being renamed :) After much fiddling with the emergency prompt and realising udev had already exited, I came accross this and it worked. This was on a mini-itx industrial board with only a compact flash socket (thus USB CD). Is there no way to watch for devices "being detected" during startup and delay until they're done?
(In reply to comment #13) > Is there no way to watch for devices "being detected" during startup and delay > until they're done? Not any practical way, no. This has been renamed in genkernel already, so it'll all be updated come 2006.1's release.
Let's consider this one FIXED, since 2006.1 is out now and it seems to boot on every USB CDROM that people have tried.
