View Issue Details

IDProjectCategoryView StatusLast Update
0003123CentOS-5kernelpublic2008-11-27 14:57
Status acknowledgedResolutionopen 
Product Version5.2 
Target VersionFixed in Version 
Summary0003123: Live CD not booting on many desktops suggesting kernel diff between full install and Live CD
DescriptionComplete problem description, booting display, and supporting info is in an
uploaded 10 KB file which can also be viewed here:


"Something" is different between modern desktops (which fail to boot the CentOS
Live CD) and old laptops (which boot the Live CD). Given several correspondents
claim a full CentOS 5.2 installs/boots/runs fine on a modern desktop, the
disparity of boot experiences suggests a different kernel (or module(s) thereof)
is used for the full install CD/DVD set than for the Live CD.
TagsNo tags attached.


has duplicate 0003211 livecd can't find SATA CDROM/DVD 


2008-09-12 11:08

administrator   ~0007956


    Thad Floryan <>
    CentOS username: Thad
    Date: 10-September-2008
    Updated: 11-SEP-2008, new symptom same problem on another desktop


    CentOS 5.2 Live CD fails booting on modern desktops but boots/loads/runs
    OK on old laptops.

    Google search finds same problem occuring since (at least) Fedora Core 7,
    many Ubuntu distros, and even Fedora 10 Live CDs.


    The following messages appear at several stages during booting the Live
    CD on several desktops; they do not appear booting on several laptops:

    "pnp: PnPACPI: METHOD_NAME_CRS failure for PNP0c01"

    "WARNING: Cannot find root file system!
     Create symlink /dev/root and then exit this shell to continue the
     boot sequence."

    "mount: special device /dev/root does not exist
     Bug in initramfs /init detected. Dropping to a shell. Good luck!"

New symptom (11-SEP-2008) same no-boot problem:

    The following two messages appeared on yet another desktop upon which I
    attempted to boot a CentOS 5.2 Live CD:

    "PCI: BIOS BUG: MCFG area at e0000000 is not E820-reserved"
    "PCI: Not using MMCONFIG"

    This desktop subsequently failed as my others do as described below in
    the "Problem setup ... display" section, but a Google search reveals the
    cause of the above two messages was supposedly fixed in February 2008 per:


    and could be ignored. Given others' experiences with a full install of
    CentOS 5.2, the problems with booting a Live CD strongly suggest there's
    a kernel (or module thereof) difference between "live" and a full install.

    As I wrote in the the Yahoo linux forum:

        This is a shame, because I would think many people would want to test
        drive a Live CD before committing to a full install, and a failure with
        a Live CD could/would sour someone on the distro.

        'Sfunny, I've never really used Live CDs before (simply doing a full
        install for over a decade now), but when I desired to install Solaris
        10 on "some" system, I downloaded/burned a check_install bootable ISO
        from Sun and took that with me to stores when I was seeking a modern
        64-bit system to purchase.

        That pleasant experience (buying a system I knew would work even if
        its parts weren't in Sun's HCL (Hardware Compatibility List)) is what
        induced me to try CentOS' Live CD before a full installation.

        The only aspect of the (to be Solaris) system that was flagged by the
        check_install CD was the Ethernet interface, and check_install supplied
        the URL at which to get the 3rd-party driver for it; that was nice.

Computer systems:

    Two Compaq Presario SR5501F desktops. One of these successfully
    triple-boots and runs Fedora 9, Solaris 10u5, and Vista SP1. The
    other successfully double-boots and runs Ubuntu 8.04 and Vista SP1.
    These systems will not successfully boot the CentOS 5.2 Live CD.
    Full system details in Appendix 1.

    One Compac Presario SR5350F desktop. Presently boots Vista SP1 and
    I want to double-boot into CentOS 5.2 and Vista SP1 after verifying
    successful booting of the CentOS 5.2 Live CD; it will not boot the
    CentOS 5.2 Live CD presently. Full system details in Appendix 2.

    Several Dell Latitude C510/C610 laptops (Pentium III M, 1.2 GHz).
    All of these boot and run the CentOS 5.2 Live CD successfully.

Problem setup and example annotated booting progress display:

    I downloaded the CentOS-5.2-i386-LiveCD.iso late last week wanting to
    "play" with it prior to installation of CentOS-5.2-i386-bin-DVD.iso
    after determining at least some hardware compatibility before doing
    a full install. The md5sums of the downloaded ISOs checked and I then
    burned a Live CD from its ISO.

    On several new desktop systems (all introduced since Feb. 2008) it
    looked like it was booting fine, a grub menu was presented, and I
    selected the "Live" option. But it stalls claiming the root filesystem
    cannot be found and, later, that it found a bug in initramfs.

    Here's the complete boot display after the grub selection:

    Loading vmlinuz0 .........
    Loading initrd0.img ........
    Memory for crash kernel (0x0 to 0x0) notwithin permissible range
    pnp: PnPACPI: METHOD_NAME_CRS failure for PNP0c01
    udev[454]: add_to_rules: unknown key 'ATTRS{media}'

    #-- The "Memory for crash kernel ..." and the "udev[454]: add ..."
    #-- also appear during my laptop's boot; the "pnp: PnPACPI ..."
    #-- does NOT appear on any laptop which boots fine beyond this point.
    #-- Below is the remaining sequence for a desktop Live CD boot

    WARNING: Cannot find root file system!

    Create symlink /dev/root and then exit this shell to continue the
    boot sequence.

    bash: no job control in this shell

    #-- And here's where it all ends; obviously there's no /dev/root in
    #-- the desktop's memory image. After my laptop boots and I login,
    #-- its /dev/root is symlinked to /dev/mapper/live-rw
    #-- There is no /dev/mapper in the desktop's live image and there are
    #-- no entries in /dev for a CD or anything else meaningful at this
    #-- stage, so I exit the shell to see what happens:

    bash-3.2# exit

    mount: special device /dev/root does not exist
    Bug in initramfs /init detected. Dropping to a shell. Good luck!

    bash: no job control in this shell

Some thoughts about the problem:

    Recommendations in the Yahoo linux forum suggested I prepare this report
    and submit it to CentOS. This report is duplicated here:


    Several people in the forum believe the problem may be related to SATA
    devices. All the desktops have either one SATA and one PATA hard disk
    or just one SATA hard disk; all of them have a SATA CD/DVD/DL drive.
    The several Dell laptops that boot the Live CD successfully have only
    one PATA (aka EIDE) 2.5" hard disk and an unknown interface CD/DVD drive.

    On suspicion of the Live CD itself which was burned at 40x, I reburned
    a new Live CD at 8x from a different system, but the problem remains.

    One person in the Yahoo linux forum claims a successful installation of
    CentOS 5.2 on a new quad core system with 4GB RAM, but he never attempted
    a Live CD boot and has not revealed whether his HDs and/or CD/DVD drive
    are SATA or PATA.

    Another person having the identical boot problem with Fedora 10 wrote the
    following at

        " I fired off a bugzilla on it, but they can't figure out where
        " to even put it at this moment. Looks like I've created a whole
        " new genre!
        " Then I get this something saying to create a symlink so I try
        " typing something like this ln -s /dev/root /isolinux/ and
        " that's when this pops up bug in /initramfs /init detected.

Appendix 1, Compaq Presario SR5501P Desktop PC (two systems):

    Motherboard: Asus M2N68-LA
    HP/Compaq motherboard name: Ivy8-GL6

    Base processor: Athlon 64 X2 (B) 4200+ 2.2 GHz (65W)
    Socket: AM2
    Chipset: NVIDIA GeForce 6150SE nForce 430
    BIOS: Award (Phoenix Technologies, LTD 5.14 05/02/2008)
    VIdeo: onboard NVIDIA GeForce 6150SE
    RAM: 4 GB DDR2 PC2-6400
    LAN: NVIDIA nForce 10/100 Mbps Networking Controller

    Hard drive 1: 160 GB SATA 3G (3.0 GB/sec) 7200 RPM
    Hard drive 2: 320 GB PATA (Maxtor) 7200 RPM
    Optical drive: 16X DVD(+/-)R/RW 12X DL LightScribe SATA drive

    One system triple-boots Fedora 9, Solaris 10u5, and Vista SP1; the other
    system double-boots Ubuntu 8.04 and Vista SP1. Neither system will
    successfully boot the CentOS 5.2 Live CD. Both systems successfully
    boot a OpenSolaris Live CD, a Vista Live CD (PE), and a Solaris Install
    Check CD.

    The system description of one, from a Solaris 10 point-of-view, is here:


Appendix 2, Compaq Presario SR5350F Desktop PC (one system):

    Motherboard: Asus IPILP-LC
    HP/Compaq motherboard name: Lancaster8-GL6

    Base processor: Intel Pentium Dual-Core E2180 2 GHz (65W)
    Socket: 775
    Chipset: Intel 945GC Express
    BIOS: American Megatrends Inc. 5.19 03/04/2008
    Video: PCI-Ex16 NVIDEO GeForce 8600 GT 1GB (onboard Intel video disabled)
    RAM: 2 GB DDR2 PC2-5300
    LAN: Realtek RTL8101E 10/100 Mbps

    Hard drive 1: 360 GB SATA (3.0 GB/sec) 7200 RPM
    Hard drive 2: 320 GB PATA (Maxtor) 7200 RPM [not yet installed]
    Optical drive: HL-DT-ST DVD-RW GSA-H60L ATA Device (SATA)

    System presently boots Vista SP1, and also successfully boots all of
    OpenSolaris Live CD, Vista Live CD (PE), and a Solaris Install Check CD.
    The system will not boot a CentOS 5.2 Live CD.

    This is the system upon which I wish to double-boot CentOS 5.2 and
    Vista SP1.


2008-09-12 12:44

reporter   ~0007957

As mentionned in the CentOS 5.2 LiveCD release notes (

-> The LiveCD will not boot successfully on a SATA CD-ROM drive (section 4, known issues)

I did not figured out yet why this is happening.

However, if you manage to transfer the LiveCD iso to a USB key, you will no longer have this issue. See for instructions about this operation.


2008-09-12 23:28

reporter   ~0007967

I just now read the Live CD release notes; thank you for the URL! Those release notes are extremely difficult to find from CentOS' "home" page and I wasn't aware there were 2 sets of 5.2 release notes.

I already had the "standard" 5.2 release notes and the issue with a Live CD and a SATA CD/DVD drive does not appear there nor in the 11 PDF files documentation set I also downloaded on Sept. 4, 2008.

If it's any help pinpointing the source of the problem, I downloaded and burned a Ubuntu 8.04.1 Live CD and it boots and runs fine on my systems that wouldn't boot the CentOS 5.2 Live CD.

The BOOT menu on these desktops gives me the choices HDD group, CD-ROM group, and LAN group. As I just now discovered (whoa! :-) both a USB thumb-drive and an external USB hard drive show up in the BIOS boot menu when I have either one plugged-in when the BIOS starts up, so I'm going to attempt the USB thumb-drive "live" boot per the instructions at the "ImageFlash" URL you cited; thanks!

If you can suggest any tests or diagnostics that I can run (possibly editing the boot params?) to assist in finding/fixing this problem, please let me know. We would need a way to log the output, too, to avoid any transcription errors on my part.

For the moment I'm going ahead with a full install of CentOS 5.2 this weekend after I see how a "live" boot works from a USB drive.


2008-11-27 14:57

reporter   ~0008342

Yeah I've gotten a nearly identical problem (with this coming up:
Bug in initramfs /init detected. Dropping to a shell. Good luck!

bash: no job control in this shell

) but I am installing Fedora 10 x64 KDE Live CD. I am fairly new to Linux, but I ran it before on my PS3 as well as other distros on my computer. I have found no one else with the "bug in initramfs" thing except one other person who said they filed a report with Fedora. Quite honestly, I don't know where else to write this. Here are my computer's stats:
Sager NP2092 (Compal FL92)
Intel Core 2 Duo T9300 @ 2.5 GHz
Windows Vista Home Premium x64
I don't know exactly what hard drive it is, but I'm pretty sure it's SATA and I know it's 80gb.
The problem may be with the CD-RW I'm using, but I don't know and don't have another one on hand. I used isorecorder v3 to burn the image and followed the steps as written on Fedora's media burning doc, and I've redownloaded it once and done a hash check. I erased the CD with Windows' "Erase CD Contents". Now I'm trying it with erasing it with Roxio and burning it with Roxio. If anything is different, I'll update.

Issue History

Date Modified Username Field Change
2008-09-12 03:58 Thad New Issue
2008-09-12 03:58 Thad File Added: CentOS_5.2_Live_CD_problem.txt
2008-09-12 11:08 Note Added: 0007956
2008-09-12 11:08 File Deleted: CentOS_5.2_Live_CD_problem.txt
2008-09-12 11:08 Status new => acknowledged
2008-09-12 12:44 Note Added: 0007957
2008-09-12 23:28 Thad Note Added: 0007967
2008-11-12 22:47 Relationship added has duplicate 0003211
2008-11-27 14:57 Californian Note Added: 0008342