[yocto] meta-cedartrail - serial console

[Darren Hart]

On 05/31/2012 12:32 PM, jfabernathy wrote:
> On 05/31/2012 02:18 PM, Bodke, Kishore K wrote:
>>
>>> -----Original Message-----
>>> From: yocto-bounces at yoctoproject.org [mailto:yocto-
>>> bounces at yoctoproject.org] On Behalf Of jfabernathy
>>> Sent: Thursday, May 31, 2012 9:12 AM
>>> To: yocto at yoctoproject.org
>>> Subject: [yocto] meta-cedartrail - serial console
>>>
>>> Using a DN2800MT (Marshalltown) Intel board, I'm testing the
>>> meta-cedartrail using edison branch and noticed an issues with the
>>> serial console.
>>>
>>> The cedartrail.conf in the machine directory has the following statements:
>>>
>>> SYSLINUX_OPTS = "serial 0 115200"
>>> SERIAL_CONSOLE = "115200 ttyS0"
>>> APPEND += "console=ttyS0,115200 console=tty0"
>>>
>> I just saw that Edison branch has ttyS3 enabled.
>>
>> SYSLINUX_OPTS = "serial 3 115200"
>> SERIAL_CONSOLE = "115200 ttyS3"
>> APPEND += "console=ttyS3,115200 console=tty3"
>>
>> Are you looking into right branch?
>>
>> Thanks
>> -Kishore.
>>   
> 
> So how do you get changes in the cedartrail.conf file to take affect??  
> I edited the file and did the bitbake again, but nothing changed.  I'm 
> guessing I need a bitbake -c cleansstate "somthing"  But I don't know 
> what to put there to make rebuild with ttyS0.
> 

Ah yes, this rebuild is a bit frustrating. I believe it is the
task_core* tasks you need to rebuild. bitbake -u depexp -g
core-image-base (whatever your image is) will allow you to view which
task_ tasks it is building, try cleansstate'ing those and rebuilding the
image.

--
Darren

> Jim A
>>> However, when the image booted, I had no serial console on ttyS0.  I
>>> checked /etc/inittab and noticed that the following line existed:
>>>
>>> S:2345:respawn:/sbin/getty 115200 ttyS3
>>>
>>> I changed the ttyS3 to ttyS0 and then I have a serial console on the
>>> next reboot.  So it appears the override in the .conf file is not
>>> working.  Also I only have the console from getty, and not the kernel
>>> logging console.
>>>
>>> Anyone have a solution??
>>>
>>> If this is considered a bug I can put it on bugzilla.
>>>
>>> Jim A
>>>
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> 
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-- 
Darren Hart
Intel Open Source Technology Center
Yocto Project - Linux Kernel