[meta-freescale] imx6q: Startup script output not shown on serial console

[Gary Thomas]

On 2015-07-09 06:51, Prasant J wrote:
> On Thu, Jul 9, 2015 at 4:52 PM, Gary Thomas <gary at mlbassoc.com> wrote:
>> On 2015-07-09 04:37, Prasant J wrote:
>>>
>>> On Mon, Jun 8, 2015 at 7:44 PM, Prasant J <pj0585 at gmail.com> wrote:
>>>>
>>>> On Mon, Jun 8, 2015 at 5:40 PM, Daiane Angolini <daiane.list at gmail.com>
>>>> wrote:
>>>>>
>>>>> On Mon, Jun 8, 2015 at 5:57 AM, Prasant J <pj0585 at gmail.com> wrote:
>>>>>>
>>>>>> Hi,
>>>>>>
>>>>>> I have built the freescale linux image (for my custom board using
>>>>>> iMX6Q) fsl_L.3.14.28-1.0.0_ga. While building I added few more
>>>>>> packages like rpm, opkg, e2fsprogs, etc.
>>>>>>
>>>>>> The startup scripts do not show std output on the serial console
>>>>>> (ttymxc0). The output is likely redirected to /dev/null. They only sow
>>>>>> errors. Which setting (file) has to be modified to get the output on
>>>>>> the serial console?
>>>>>
>>>>>
>>>>>
>>>>> http://git.yoctoproject.org/cgit/cgit.cgi/meta-fsl-arm/tree/conf/machine/include/imx6sabresd-common.inc#n6
>>>>>
>>>>> Take a look in the difference between file imx6sabresd-common.inc and
>>>>> imx6sabreauto-common.inc
>>>>>
>>>>> Maybe it can help you
>>>>>
>>>>
>>>> Thanks Daiane for your inputs!
>>>>
>>>> The link you pasted indicates that correct serial port must be specified.
>>>>
>>>> I have ensured that correct serial port is set (/etc/inittab) . I can
>>>> see the errors but I cannot see the stdout.
>>>> I think there is a setting for verbosity, which is set to quiet. I'm
>>>> not sure though.
>>>>
>>>> FYI: I also have installed procps package.
>>>>
>>>> I modified the file /etc/init.d/bootmisc.sh:
>>>> original line:  eval /sbin/sysctl -p "${SYSCTL_CONF}" $VERBOSE_REDIR
>>>> edited line:    eval /sbin/sysctl -p "${SYSCTL_CONF}"
>>>> (VERBOSE_REDIR is set to "1>/dev/null")
>>>>
>>>> After the above modification, I can see script stdout while system
>>>> reboot or shutdown, but I cannot see the same during system startup.
>>>>
>>>>
>>>
>>> I have built the yocto image again (fsl_L.3.14.28-1.0.0_ga) (framebuffer)
>>>
>>>
>>> I verified the file:
>>>
>>> fsl-L3.14.28-1.0.0_ga/fsl-release-bsp/sources/meta-fsl-arm/conf/machine/include/imx6sabresd-common.inc
>>> correct console device and baud rate is selected (ttymxc0).
>>>
>>>
>>> I have installed extra packages by adding the following line to
>>> conf/local.conf:
>>> CORE_IMAGE_EXTRA_INSTALL += " rpm opkg freetype createrepo
>>> libsocketcan ntp parted cairo curl python-pycurl expat harfbuzz htop
>>> pixman tslib e2fsprogs fontconfig pango glib-2.0 opkg-utils sqlite3
>>> python-pysqlite libcurl bzip2 dropbear python-smartpm tzdata
>>> python-debugger python-difflib python-sqlite3 connman connman-client
>>> e2fsprogs-tune2fs lsof msmtp iptables "
>>>
>>>
>>> I do not see the init scripts log on the serial console (during
>>> startup). There is no issue with console configuration as the init
>>> scripts show log during shutdown/reboot.
>>>
>>>
>>>
>>> If I run "ps eax", I see the following (partial output shown here):
>>>
>>>    1424 ?        Ss     0:00 /lib/udev/udevd -d CONSOLE=/dev/null
>>> display_lvds0= display_lvds1= SHELL=/bin/sh TERM=linux prevlevel=N
>>> INIT_VERSION=sysvinit-2.88 PATH=/sbin:/bin:/usr/sbin:/usr/bin
>>> ACTION=add runlevel=S RUNLEVEL=S PWD=/ VERBOSE=very TZ=/etc/localtime
>>> PREVLEVEL=N previous=N SHLVL=2 HOME=/ _=/lib/udev/udevd
>>>    1509 ?        S      0:00 /lib/udev/udevd -d CONSOLE=/dev/null
>>> display_lvds0= display_lvds1= SHELL=/bin/sh TERM=linux prevlevel=N
>>> INIT_VERSION=sysvinit-2.88 PATH=/sbin:/bin:/usr/sbin:/usr/bin
>>> ACTION=add runlevel=S RUNLEVEL=S PWD=/ VERBOSE=very TZ=/etc/localtime
>>> PREVLEVEL=N previous=N SHLVL=2 HOME=/ _=/lib/udev/udevd
>>>    1510 ?        S      0:00 /lib/udev/udevd -d CONSOLE=/dev/null
>>> display_lvds0= display_lvds1= SHELL=/bin/sh TERM=linux prevlevel=N
>>> INIT_VERSION=sysvinit-2.88 PATH=/sbin:/bin:/usr/sbin:/usr/bin
>>> ACTION=add runlevel=S RUNLEVEL=S PWD=/ VERBOSE=very TZ=/etc/localtime
>>> PREVLEVEL=N previous=N SHLVL=2 HOME=/ _=/lib/udev/udevd
>>>    1973 ?        Ss     0:00 /usr/bin/eGTouchD CONSOLE=/dev/null
>>> display_lvds0= display_lvds1= TERM=linux SHELL=/bin/sh
>>> INIT_VERSION=sysvinit-2.88
>>> PATH=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin
>>> RUNLEVEL=5 runlevel=5 PWD=/ VERBOSE=very PREVLEVEL=N previous=N HOME=/
>>> SHLVL=2 _=/usr/bin/eGTouchD
>>>    1983 ?        Ss     0:00 /usr/bin/dbus-daemon --system
>>> CONSOLE=/dev/null display_lvds0= display_lvds1= TERM=linux
>>> SHELL=/bin/sh INIT_VERSION=sysvinit-2.88
>>> PATH=/sbin:/usr/sbin:/bin:/usr/bin RUNLEVEL=5 runlevel=5 PWD=/
>>> VERBOSE=very PREVLEVEL=N previous=N HOME=/ SHLVL=2
>>> _=/sbin/start-stop-daemon
>>>    1989 ?        Ss     0:00 /usr/sbin/connmand CONSOLE=/dev/null
>>> display_lvds0= display_lvds1= TERM=linux SHELL=/bin/sh
>>> INIT_VERSION=sysvinit-2.88 PATH=/sbin:/usr/sbin:/bin:/usr/bin
>>> RUNLEVEL=5 runlevel=5 PWD=/ VERBOSE=very PREVLEVEL=N previous=N HOME=/
>>> SHLVL=2 _=/usr/sbin/connmand
>>>
>>>
>>>
>>> I edit the file: /etc/init.d/rc and exported CONSOLE=/dev/ttymxc0.
>>> When I reboot the system and re-run "ps eax" I can see the CONSOLE env
>>> getting correctly updated. But still no output on the serial log.
>>>
>>>
>>> Any inputs what may be going wrong?
>>>
>>> I'm kind of stuck here. Any information might be of help to me.
>>>
>>>
>>> Regards, Pj
>>>
>>
>> What is your boot command line?
>>    # cat /proc/cmdline
>>
>> It should be something that contains 'console=ttymxc0'
>>
>> --
>
> Gary, console is set to "ttymxc0,57600' . I can see in the cat /proc/cmdline.

Are you really running the console at 57600 baud?  The default
is normally 115200.  What's in your /etc/inittab?  e.g. send
the output from this command:

   # grep mxc0 /etc/inittab
    mxc0:12345:respawn:/sbin/getty -L 115200 ttymxc0


-- 
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Gary Thomas                 |  Consulting for the
MLB Associates              |    Embedded world
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