Public bug reported:
I am using a new Dell E6500 Latitude laptop with Ubuntu 9.04 installed.
I commented out the line in /etc/X11/default-display-manager to suppress
the graphics login while debugging changes to /etc/X11/xorg.conf. When
the changes to xorg.conf were satisfactorily implemented, I removed the
comment indicator from the line in default-display-manager. I performed
a reboot as root. When the system finished the bios screen, it stopped
with
No OS found
Insert OS setup disk, then press any key
I expected the grub loader menu to come up. It did not.
If I power off and press f12 for a one time diagnostics menu, I get a
diagnostics screen that allows selecting the boot source (i.e., usb
drive/CDROM/hard disk drive/diagnostics suite). If I select hard disk
drive, then grub comes up and the boot sequence is normal from there.
Although my configuration includes a second monitor, I have repeated
this process on a second E6500 that only has the laptop display and
suffered the identical problem. I repeated this process on the one
without a second display because the xorg.conf above fixed the
resolution problem with Ubuntu 9.04 not recognizing the 1920x1200
display on the laptop and only permitted 1600x1200 resolution on the
laptop display. Setting the virtual attribute in xorg.conf allows the
display to use its 1920x1200 resolution. The default xorg.conf restricts
the display to 1600x1200.
I suspect that disabling the GDM window manager caused some change in
the initialization sequence that is not recovering when it is reenabled.
I did this same thing on Ubuntu 8.04 and did not have this problem. The
default 8.04 xorg.conf is substantially different from default 9.04
xorg.conf.
ProblemType: Bug
Architecture: i386
DistroRelease: Ubuntu 9.04
HibernationDevice: RESUME=UUID=f5788e80-4ca3-4601-afe8-6fa5fac483ae
MachineType: Dell Inc. Latitude E6500
NonfreeKernelModules: wl
Package: linux-image-2.6.28-15-generic 2.6.28-15.52
ProcCmdLine: root=UUID=3b8d9684-1fd1-4fc9-8c36-3c08a5f53de3 ro xforcevesa quiet
splash
ProcEnviron:
PATH=(custom, user)
LANG=en_US.UTF-8
SHELL=/bin/bash
ProcVersionSignature: Ubuntu 2.6.28-15.52-generic
SourcePackage: linux
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Tags: apport-bug i386
--
No OS found on power up
https://bugs.launchpad.net/bugs/446796
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