Help: OMAP5912 RS232 dies after kernel uncompressing.

Help: OMAP5912 RS232 dies after kernel uncompressing.

[Juergen Sievers]

Hello. 

After I modified the environment by using setenv/saveenv I got the following
problem.

The terminal connected to the OMAP5912 rs232 at 115200n8 is working as long
as the kernel is uploaded and decompressing. The last message shown is
".booting."

After that message the rs232 line seems to be dead.

The kernel is mounting its root from nfs-server and is running normally
except the console device could be used.

I tried several kernels (2.6.16/2.6.19) including the pre-build kernel 2.4
from the distribution CD All the same, the rs232 line dies after
uncompressing the kernel.

My bootags setting are:

Bootargs = "mem=32 console=ttyS0,115200n8 ip=dhcp root=/dev/nfs rw
nfsroot=192.168.0.50:/nfsroot"

Has anybody an idea what I could do to get back my rs232 console ?

Regards

Juergen

RE: Help: OMAP5912 RS232 dies after kernel uncompressing.

[Abot Botbot]

Juergen,

  Perhaps your NFS Share isn't set up correctly? I had that problem before I 
had set up my NFS share with the right perms and whatnot. Maybe look into 
the particulars of the config file and make sure all is well. Try mounting 
the target NFS with another machine other than the board.

Hope this helps,
Andy

>From: "Juergen Sievers" <JSievers@nadine-software.com>
>Reply-To: JSievers@nadine-software.com
>To: "'Linux OMAP List'" <linux-omap-open-source@linux.omap.com>
>Subject: Help: OMAP5912 RS232 dies after kernel uncompressing.
>Date: Mon, 15 Jan 2007 16:22:26 +0100
>
>
>Hello.
>
>After I modified the environment by using setenv/saveenv I got the 
>following
>problem.
>
>The terminal connected to the OMAP5912 rs232 at 115200n8 is working as long
>as the kernel is uploaded and decompressing. The last message shown is
>".booting."
>
>After that message the rs232 line seems to be dead.
>
>The kernel is mounting its root from nfs-server and is running normally
>except the console device could be used.
>
>I tried several kernels (2.6.16/2.6.19) including the pre-build kernel 2.4
>from the distribution CD All the same, the rs232 line dies after
>uncompressing the kernel.
>
>My bootags setting are:
>
>Bootargs = "mem=32 console=ttyS0,115200n8 ip=dhcp root=/dev/nfs rw
>nfsroot=192.168.0.50:/nfsroot"
>
>Has anybody an idea what I could do to get back my rs232 console ?
>
>Regards
>
>Juergen
>
>
>_______________________________________________
>Linux-omap-open-source mailing list
>Linux-omap-open-source@linux.omap.com
>http://linux.omap.com/mailman/listinfo/linux-omap-open-source

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Re: Help: OMAP5912 RS232 dies after kernel uncompressing.

[Liem Pham Tan]

hi Juergen,
please re-check that there is no gaps in the "console=ttyS0,115200n8". If you write "console=ttyS0,_115200n8", the rs232 connection seems to be dead.
BR,
Liem Pham


> Hello. 
>
> After I modified the environment by using setenv/saveenv I got the following
> problem.
>
> The terminal connected to the OMAP5912 rs232 at 115200n8 is working as long
> as the kernel is uploaded and decompressing. The last message shown is
> ".booting."
>
> After that message the rs232 line seems to be dead.
>
> The kernel is mounting its root from nfs-server and is running normally
> except the console device could be used.
>
> I tried several kernels (2.6.16/2.6.19) including the pre-build kernel 2.4
> from the distribution CD All the same, the rs232 line dies after
> uncompressing the kernel.
>
> My bootags setting are:
>
> Bootargs = "mem=32 console=ttyS0,115200n8 ip=dhcp root=/dev/nfs rw
> nfsroot=192.168.0.50:/nfsroot"
>
> Has anybody an idea what I could do to get back my rs232 console ?
>
> Regards
>
> Juergen
>
>
> _______________________________________________
> Linux-omap-open-source mailing list
> Linux-omap-open-source@linux.omap.com
> http://linux.omap.com/mailman/listinfo/linux-omap-open-source
>
>   

Help: OMAP5912 RS232 dies after kernel uncompressing.

[Juergen Sievers]

Oh, Oh!  

 

That is really embarrassing but I found my mistake. 

 

I have forgotten to append a ‘M’ to the ‘mem=xy’ statement. So my kernel was
thinking there is only 32 byte of memory.  

Why it still was booting is a miracle too but with ‘mem=32M’ it works proper
again.

 

Regards   0(°^°)0

J.