Hi,

So the chain to boot would be something like :

$ sudo qemu -m 512 -enable-kvm disk.img -append
"console=ttyS0 root=/dev/sda1 ro" -kernel bzImage -initrd
initrd.img-2.6.37


On 14/04/2011 03:51, Mulyadi Santosa wrote:
> Hi... :)
>
> On Wed, Apr 13, 2011 at 11:27, Minwoo Lee<ermaker@gmail.com>  wrote:
>> Hi, all.
>>
>> I want to study kernel, so I tried booting my custom compiled kernel
>> on qemu with '-kernel' and '-initrd' option.
>>
>> First, I installed ubuntu 10.10 with cdrom, no LVM.
>> $ qemu disk.img -cdrom ubuntu-10.10-server-i386.iso -vnc :1
>>
>> After installation, I tried booting my custom compiled kernel(but not
>> modified, just compiled).
>> $ sudo qemu -m 512 -enable-kvm disk.img -nographic -append
>> "console=ttyS0 root=/dev/sda1 ro" -kernel bzImage -initrd
>> initrd.img-2.6.37
> Just to make sure few things:
> 1. are you really going to setup serial console only guest? because I
> saw that nographic and console=ttyS0
>
> 2. and the initrd, is that the correct initrd that is built against your kernel?
>
>> And I got result like this.
>>
>> [    2.687558] EXT4-fs (sda1): INFO: recovery required on readonly filesystem
>> [    2.688085] EXT4-fs (sda1): write access will be enabled during recovery
>> [    2.691679] EXT4-fs (sda1): recovery complete
>> [    2.944387] EXT4-fs (sda1): mounted filesystem with ordered data
>> mode. Opts: (null)
>> Begin: Running /scripts/local-bottom ... done.
>> done.
>> Begin: Running /scripts/init-bottom ... done.
>> [    2.988413] e1000 0000:00:03.0: eth0: (PCI:33MHz:32-bit) 52:54:00:12:34:56
>> [    2.988871] e1000 0000:00:03.0: eth0: Intel(R) PRO/1000 Network Connection
> just a guess: maybe it didn't freeze...it just display things but
> toward serial console.... for a test, I suggest (untested) to dump out
> -nographic and instead use buit in qemu serial console. Switch to it
> by pressing Ctrl-Alt-3 and see if there are message showing there...
>

Hi, Mulyadi and Luis. Your suggestion is correct. Thank you. It just display things but not toward serial. Could I ask you about one more question? I want to use serial for login and doing some command in shell. I found that it is about /etc/init and getty, but I just found the solution with /etc/inittab (I knew it is for old version). 2011/4/14 Mulyadi Santosa <mulyadi.santosa@gmail.com>

Hi...

On Thu, Apr 14, 2011 at 09:49, Luis Cebamanos <luiceur@gmail.com> wrote:

...

Hi,

So the chain to boot would be something like :

$ sudo qemu -m 512 -enable-kvm disk.img -append "console=ttyS0 root=/dev/sda1 ro" -kernel bzImage -initrd initrd.img-2.6.37

I think so...let's see if that works for the original poster's problem...

-- regards,

Mulyadi Santosa Freelance Linux trainer and consultant

blog: the-hydra.blogspot.com training: mulyaditraining.blogspot.com

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On Thu, Apr 14, 2011 at 16:29, Minwoo Lee <ermaker@gmail.com> wrote:

Oh, I found it. Thank you for replying my stupid questions. This is the information about my question. https://help.ubuntu.com/community/SerialConsoleHowto

Minwoo, I think qemu-devel is more appropriate forum to discuss this qemu specific questions. We welcome you there :) -- regards, Mulyadi Santosa Freelance Linux trainer and consultant blog: the-hydra.blogspot.com training: mulyaditraining.blogspot.com