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Bruno Costacurta 03-14-2012 09:06 AM

Boot problem : how to make it verbose ?
 
Hello,

I installed Debian Squeeze on a multi-boot PC where Ubuntu is the
first and bootable distro.
Using GRUB2, the options 'nosplash debug --verbose' are used, but
Debian freezes silently.

How to make boot verbose to see what happen ?

Hereafter the /boot/grub/grub.cfg :

menuentry "test Debian GNU/Linux, with Linux 2.6.32-5-amd64 (on
/dev/sda4)" --class gnu-linux --class gnu --class os {

insmod part_gpt
insmod ext2
set root='(hd0,gpt4)'
search --no-floppy --fs-uuid --set=root b6ebc0b2-59cc-4ceb-81ba-c60d90be2fdc
linux /boot/vmlinuz-2.6.32-5-amd64
root=UUID=b6ebc0b2-59cc-4ceb-81ba-c60d90be2fdc ro nosplash debug
--verbose

initrd /boot/initrd.img-2.6.32-5-amd64


The original entry in grub.cfg was created by update-grub under Xubuntu.
From this entry was added in file /etc/grub.d/40_custom the option
'quiet( was replaced by 'nosplash debug --verbose' as a try to obtain
verbosity.

Then again update-grub to update grub.cfg file.

Thanks for attention and clue.
Bruno

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Brian 03-14-2012 12:00 PM

Boot problem : how to make it verbose ?
 
On Wed 14 Mar 2012 at 11:06:04 +0100, Bruno Costacurta wrote:

> I installed Debian Squeeze on a multi-boot PC where Ubuntu is the first
> and bootable distro.
> Using GRUB2, the options 'nosplash debug --verbose' are used, but Debian
> freezes silently.
> How to make boot verbose to see what happen ?
>
> Hereafter the /boot/grub/grub.cfg :
>
> menuentry "test Debian GNU/Linux, with Linux 2.6.32-5-amd64 (on
> /dev/sda4)" --class gnu-linux --class gnu --class os {
> insmod part_gpt
> insmod ext2
> set root='(hd0,gpt4)'
> search --no-floppy --fs-uuid --set=root b6ebc0b2-59cc-4ceb-81ba-c60d90be2fdc
> linux /boot/vmlinuz-2.6.32-5-amd64
> root=UUID=b6ebc0b2-59cc-4ceb-81ba-c60d90be2fdc ro nosplash debug
> --verbose
> initrd /boot/initrd.img-2.6.32-5-amd64

Are 'nosplash' and 'debug --verbose' parameters the kernel knows about?
Anyway, when GRUB comes up edit the entry (hit the 'e' key) to remove
them and then boot.

> The original entry in grub.cfg was created by update-grub under Xubuntu.
> From this entry was added in file /etc/grub.d/40_custom the option
> 'quiet( was replaced by 'nosplash debug --verbose' as a try to obtain
> verbosity.
> Then again update-grub to update grub.cfg file.

The usual place to put kernel parameters is /etc/default/grub. Just
removing 'quiet' should get you more verbosity.


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Camaleón 03-14-2012 02:47 PM

Boot problem : how to make it verbose ?
 
On Wed, 14 Mar 2012 11:06:04 +0100, Bruno Costacurta wrote:

> I installed Debian Squeeze on a multi-boot PC where Ubuntu is the first
> and bootable distro.

Are you chainloading GRUB2s or are you loading Debian directly from
Ubuntu's own GRUB2 version?

> Using GRUB2, the options 'nosplash debug --verbose' are used, but Debian
> freezes silently.
> How to make boot verbose to see what happen ?

(...)

The changes you have done should be enough.

In what stage is the system hanging at? What can you see in the screen?
Can you at least reach the GRUB2 boot menu?

I would try to load Debian from SuperGrub2Disk or any other LiveCD just
to test if it hangs at the same point.

Greetings,

--
Camaleón


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Bruno Costacurta 03-14-2012 06:48 PM

Boot problem : how to make it verbose ?
 
I installed Debian Squeeze on a multi-boot PC where Ubuntu is the first
and bootable distro.

Are you chainloading GRUB2s or are you loading Debian directly from
Ubuntu's own GRUB2 version?


I boot direclt from the Ubuntu's own GRUB2 version.


Using GRUB2, the options 'nosplash debug --verbose' are used, but Debian
freezes silently.
How to make boot verbose to see what happen ?

(...)

The changes you have done should be enough.


However other options were also tried without any result.


In what stage is the system hanging at? What can you see in the screen?
Can you at least reach the GRUB2 boot menu?
I would try to load Debian from SuperGrub2Disk or any other LiveCD just
to test if it hangs at the same point.


Yes, the GRUB2 menu is reached (in fact, it's used to boot the other
system on same PC). The Debian system hangs direcly. Nothing is
displayed.
Yes, a LiveCD Debian 6 works fine (however it was a i386, the
installed Debian is a amd64, the working Xubuntu is also a amd64).


Bye,
Bruno


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Brian 03-14-2012 10:07 PM

Boot problem : how to make it verbose ?
 
On Wed 14 Mar 2012 at 20:48:03 +0100, Bruno Costacurta wrote:

> Yes, the GRUB2 menu is reached (in fact, it's used to boot the other
> system on same PC). The Debian system hangs direcly. Nothing is
> displayed.
> Yes, a LiveCD Debian 6 works fine (however it was a i386, the installed
> Debian is a amd64, the working Xubuntu is also a amd64).

Go to the commandline from the GRUB menu. Type 'ls' for a list of the
disks and partitions on them. It seems (hd0,gpt4) is where you have
Debian. 'ls -l (hd0,gpt4) should allow you to check the UUID of the
partition. With 'ls -l (hd0,gpt4)/boot' the kernel and initrd.img can be
checked.


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Camaleón 03-15-2012 02:10 PM

Boot problem : how to make it verbose ?
 
On Wed, 14 Mar 2012 20:48:03 +0100, Bruno Costacurta wrote:

>>> I installed Debian Squeeze on a multi-boot PC where Ubuntu is the
>>> first and bootable distro.
>> Are you chainloading GRUB2s or are you loading Debian directly from
>> Ubuntu's own GRUB2 version?
>
> I boot direclt from the Ubuntu's own GRUB2 version.

Mmm... so you did not install GRUB2 when you installed Debian, right?

>>> Using GRUB2, the options 'nosplash debug --verbose' are used, but
>>> Debian freezes silently.
>>> How to make boot verbose to see what happen ?
> (...)
>> The changes you have done should be enough.
>
> However other options were also tried without any result.

Because the hang occurs at a very early stage, I'd say.

>> In what stage is the system hanging at? What can you see in the screen?
>> Can you at least reach the GRUB2 boot menu? I would try to load Debian
>> from SuperGrub2Disk or any other LiveCD just to test if it hangs at the
>> same point.
>
> Yes, the GRUB2 menu is reached (in fact, it's used to boot the other
> system on same PC). The Debian system hangs direcly. Nothing is
> displayed.

A complete black screen, then?

Can you copy/paste the GRUB2 stanza for your Debian menu entry?

> Yes, a LiveCD Debian 6 works fine (however it was a i386, the installed
> Debian is a amd64, the working Xubuntu is also a amd64).

:-)

Well, I wanted you to try to boot your current Debian installation *from*
a LiveCD (IIRC tehre is usually an option called "boot from installed
disk" or something similar) not that you tested a LiveCD. I asked this to
avoid using Ubuntu's GRUB2 and see if that way you can get any further.
That's also the reason I asked for you to try SuperGrub2Disk.

Another thing you can test is manually booting your Debian system from
GRUB2 boot menu by reaching the command line. This way if you're lucky
any error you get will be printed on the screen.

Greetings,

--
Camaleón


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