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[Bug 600728] Re: gave up waiting for root device (temporary, intermittent)

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steven20, thank you for your comment. So your hardware and problem may be tracked, could you please file a new report with Ubuntu by executing the following in a terminal while booted into a Ubuntu repository kernel (not a mainline one) via:
ubuntu-bug linux

For more on this, please read the official Ubuntu documentation:
Ubuntu Bug Control and Ubuntu Bug Squad: https://wiki.ubuntu.com/Bugs/BestPractices#X.2BAC8-Reporting.Focus_on_One_Issue
Ubuntu Kernel Team: https://wiki.ubuntu.com/KernelTeam/KernelTeamBugPolicies#Filing_Kernel_Bug_reports
Ubuntu Community: https://help.ubuntu.com/community/ReportingBugs#Bug_reporting_etiquette

When opening up the new report, please feel free to subscribe me to it.

Thank you for your understanding.

Helpful bug reporting tips:
https://wiki.ubuntu.com/ReportingBugs

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https://bugs.launchpad.net/bugs/600728

Title:
  gave up waiting for root device (temporary, intermittent)

Status in “linux” package in Ubuntu:
  Invalid

Bug description:
  My Lucid installation sometimes fails to boot, dropping me instead
  into a BusyBox shell.  The error message looks like this:

  Gave up wiating for root device.  Common problems:
   - Boot args (cat /proc/cmdline)
     - check rootdelay= (did the system wait long enough?)
     - check root= (did the system wait for the right device?)
   - missing modules (cat /proc/modules; ls /dev)
  ALERT! /dev/disk/by-uuid/01234567-89ab-cdef-0123-456789abcdef does not exist. Dropping to a shell!
  BusyBox v1.13.3 (Ubuntu 1:1.13.3-1ubuntu11) built-in shell (ash)
  Enter 'help' for a list of built-in commands.
  (initramfs) _

  My root= line contains the correct uuid.  (I masked it in the error
  message above.)

  Adding a rootdelay= of a couple minutes seems to make it fail less
  often.  This is not a viable solution, because a couple minutes is way
  to long to have to wait, because it doesn't always help, and because
  booting used to work just fine with no wait.

  If I wait a few minutes and type 'exit' at the (initramfs) prompt, the
  system boots.  Sometimes I have to try this a few times before it
  works.

  This bug is distinct from bug 360378, because in my case, the system
  is able to boot if I wait long enough.  (Note the comments in bug
  360378 stating that rootdelay doesn't help there.)

  The problem is clearly not because my disk is taking too long to
  become ready.  My root, /boot, and boot sector are all on the same
  disk.  If the disk wasn't ready, the system would not have been able
  to load GRUB or reach the BusyBox shell.

  This seems to be a regression.  My system booted consistently in early
  Intrepid kernels and in releases earlier than Intrepid.  The problem
  first showed up late in the Intrepid release cycle, presumably after a
  kernel upgrade.

  I was using GRUB 1 when the problem first appeared.  It still exists after upgrading to GRUB 2.
  --- 
  AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.21.
  Architecture: i386
  CRDA: Error: [Errno 2] No such file or directory
  Card0.Amixer.info:
   Card hw:0 'Audigy2'/'SB Audigy 2 ZS [SB0353] (rev.4, serial:0x10031102) at 0xec00, irq 17'
     Mixer name	: 'SigmaTel STAC9721,23'
     Components	: 'AC97a:83847609'
     Controls      : 210
     Simple ctrls  : 46
  DistroRelease: Ubuntu 10.04
  Frequency: Once every few days.
  HibernationDevice: RESUME=UUID=cf1efe17-335f-4939-aff9-d91f8a4c8ed0
  IwConfig:
   lo        no wireless extensions.
   
   eth0      no wireless extensions.
   
   vboxnet0  no wireless extensions.
  MachineType: System manufacturer P5K/EPU
  NonfreeKernelModules: nvidia
  Package: linux (not installed)
  ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.32-23-generic root=UUID=64d0462d-8c6e-4a80-9b4b-60a144cda037 ro quiet splash
  ProcEnviron:
   PATH=(custom, user)
   LANG=en_US.utf8
   SHELL=/bin/bash
  ProcVersionSignature: Ubuntu 2.6.32-23.37-generic 2.6.32.15+drm33.5
  Regression: Yes
  RelatedPackageVersions: linux-firmware 1.34.1
  Reproducible: No
  RfKill:
   
  Tags: lucid filesystem regression-update needs-upstream-testing
  Uname: Linux 2.6.32-23-generic i686
  UserGroups: adm admin audio cdrom dialout dip floppy fuse kvm lpadmin plugdev sambashare uml-net video wireshark www-data
  WifiSyslog:
   
  dmi.bios.date: 06/19/2008
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: 0604
  dmi.board.asset.tag: To Be Filled By O.E.M.
  dmi.board.name: P5K/EPU
  dmi.board.vendor: ASUSTeK Computer INC.
  dmi.board.version: Rev 1.xx
  dmi.chassis.asset.tag: Asset-1234567890
  dmi.chassis.type: 3
  dmi.chassis.vendor: Chassis Manufacture
  dmi.chassis.version: Chassis Version
  dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr0604:bd06/19/2008:svnSystemmanufacturer:pnP5K/EPU:pvrSystemVersion:rvnASUSTeKComputerINC.:rnP5K/EPU:rvrRev1.xx:cvnChassisManufacture:ct3:cvrChassisVersion:
  dmi.product.name: P5K/EPU
  dmi.product.version: System Version
  dmi.sys.vendor: System manufacturer

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