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

[Prasant J]

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.

Regards, Pj