MIPS kernel hangs: Warning: unable to open an initial console. /sbin/init

MIPS kernel hangs: Warning: unable to open an initial console. /sbin/init

[abhiruchi.g]

Hi,

My kernel hangs by initializing the system. My target is Alchemy DB1200. I use crosstool-ng to build MIPS cross toolchain and ptxdist to build ext2 filesystem.
kernel version:linux-2.6.22


I added some printk's  linux/init/main.c to see what happens.

#############################################################

	.
	.
	.
	(void) dup(0);
	(void) dup(0);

	/*
	 * We try each of these until one succeeds.
	 *
	 * The Bourne shell can be used instead of init if we are
	 * trying to recover a really broken machine.
	 */
	if (execute_command)
		run_init_process(execute_command);
	printk("before /sbin/init\n");
	run_init_process("/sbin/init");
	printk("before /etc/init\n");
	run_init_process("/etc/init");
	printk("before  /bin/init\n");
	run_init_process("/bin/init");
	printk("before  /bin/sh\n");
	run_init_process("/bin/sh");

it hangs after /sbin/init

What could be the problem?

I tried to give init="/sbin/abhi"
"abhi" is an executable file with printf statement.
but kernel stops after :


Waiting 10sec before mounting root device...
scsi 0:0:0:0: Direct-Access     Ut163    USB2FlashStorage 0.00 PQ: 0 ANSI: 2
sd 0:0:0:0: [sda] 983808 512-byte hardware sectors (504 MB)
sd 0:0:0:0: [sda] Write Protect is off
sd 0:0:0:0: [sda] Assuming drive cache: write through
sd 0:0:0:0: [sda] 983808 512-byte hardware sectors (504 MB)
sd 0:0:0:0: [sda] Write Protect is off
sd 0:0:0:0: [sda] Assuming drive cache: write through
 sda:<7>usb-storage: queuecommand called
 sda1
sd 0:0:0:0: [sda] Attached SCSI removable disk
sd 0:0:0:0: Attached scsi generic sg0 type 0
VFS: Mounted root (ext2 filesystem) readonly.
mount_block_root: name=/dev/root fs=ext2 flags=32769
Freeing unused kernel memory: 156k freed
Warning: unable to open an initial console.
---ag: /sbin/abhi

Re: MIPS kernel hangs: Warning: unable to open an initial console. /sbin/init

[Manuel Lauss]

On Thu, May 15, 2008 at 08:55:39AM -0400, abhiruchi.g@vaultinfo.com wrote:
> Hi,
> 
> My kernel hangs by initializing the system. My target is Alchemy DB1200. I use crosstool-ng to build MIPS cross toolchain and ptxdist to build ext2 filesystem.
> kernel version:linux-2.6.22

Try and add "console=ttyS0,115200" to the kernel commandline (either in
yamon or kernel config).


	Manuel Lauss

Re: MIPS kernel hangs: Warning: unable to open an initial console. /sbin/init

[Jun Ma]

On Thu, May 15, 2008 at 9:38 PM, Manuel Lauss
<mano@roarinelk.homelinux.net> wrote:
> On Thu, May 15, 2008 at 08:55:39AM -0400, abhiruchi.g@vaultinfo.com wrote:
>> Hi,
>>
>> My kernel hangs by initializing the system. My target is Alchemy DB1200. I use crosstool-ng to build MIPS cross toolchain and ptxdist to build ext2 filesystem.
>> kernel version:linux-2.6.22
>
> Try and add "console=ttyS0,115200" to the kernel commandline (either in
> yamon or kernel config).
>
>

And you must have a tty node in your /dev directory, e.g. /dev/ttyS0


-- 
FIXME if it is wrong.