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= Introduction =
This page collects all the Frequently Asked Question regarding Axel Ultra/Lite SOMsand XELK kit.
= General =
'''A''': The splash screen in U-Boot is supported starting from version 2013.04-xelk-2.2.0. For detailed information, please refer to [[Customizing the splash screen (Axel)]].
=== Q: How to enter RTC mode? ===
By default, iMX6 RTC driver is built into the kernel. Upon power-up, it prints informational messages that look like this.
<pre>
[ 2.017007] snvs_rtc 20cc034.snvs-rtc-lp: rtc core: registered 20cc034.snvs-rtc-lp as rtc0
[ 2.025312] snvs_rtc 20cc034.snvs-rtc-lp: configured with power off disabled
[ 3.290548] snvs_rtc 20cc034.snvs-rtc-lp: setting system clock to 1970-01-01 00:00:01 UTC (1)
</pre>
To initialize it, please use these commands:
<pre>
root@axel-lite:~# date 053014172016
Mon May 30 14:17:00 UTC 2016
root@axel-lite:~# hwclock -w
root@axel-lite:~# hwclock
Mon May 30 14:17:07 2016 0.000000 seconds
</pre>
To enter RTC mode, use the <code>shutdown</code> command as shown in the following example:
<pre>
root@axel-lite:~# shutdown -h now
Broadcast message from root@axel-lite (ttymxc2) (Mon May 30 14:17:37 2016):
The system is going down for system halt NOW!
INIT: Switching to runlevel: 0
INIT: Sending processes the TERM signal
root@axel-lite:~# Stopping XServer
Stopping Dropbear SSH server: stopped /usr/sbin/dropbear (pid 686)
dropbear.
* Stopping Avahi mDNS/DNS-SD Daemon: avahi-daemon
** (oprofile-server:732): WARNING **: Avahi error: Daemon connection failed
...done.
Stopping advanced power management daemon: no /usr/sbin/apmd found; none killed
apmd.
Stopping system message bus: dbus.
stopping statd: done
stopping mountd: done
stopping nfsd: done
Stopping OProfileUI server
Stopping syslogd/klogd: stopped syslogd (pid 712)
stopped klogd (pid 714)
done
Stopping Connection Manager
Stopping Telephony daemon
ALSA: Storing mixer settings...
not deconfiguring network interfaces: network file systems still mounted.
Stopping Linux NFC daemon
Sending all processes the TERM signal...
rpcbind: rpcbind terminating on signal. Restart with "rpcbind -w"
Error VT_WAITACTIVE failed
: Interrupted system call
Sending all processes the KILL signal...
Unmounting remote filesystems...
Stopping rpcbind daemon...
not running.
Deactivating swap...
Unmounting local filesystems...
[ 234.876402] System halted.
</pre>
RTC will be kept alive even if 3V3VIN voltage is removed. Please refer to [[Integration_guide_(Axel)#Real-time_clock_.28RTC.29|these important issues]] related to RTC power handling.
