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    <title>i.MX ProcessorsのトピックSystem be hanged after reboot command</title>
    <link>https://community.nxp.com/t5/i-MX-Processors/System-be-hanged-after-reboot-command/m-p/823824#M126699</link>
    <description>&lt;HTML&gt;&lt;HEAD&gt;&lt;/HEAD&gt;&lt;BODY&gt;&lt;P&gt;Hi Community,&lt;/P&gt;&lt;P&gt;&lt;/P&gt;&lt;P&gt;I'm working on i.MX6 sabreSD DL and using linux kernel L4.1.15.&lt;/P&gt;&lt;P&gt;&lt;/P&gt;&lt;P&gt;My hardware designed will connect WDOG_B to PMIC Control PWRON.&lt;/P&gt;&lt;P&gt;&lt;/P&gt;&lt;P&gt;After I send reboot command WDOG_B will reset and cause PMIC Control PWRON reset too.&lt;/P&gt;&lt;P&gt;&lt;/P&gt;&lt;P&gt;Then the system be hanged like below log.&lt;/P&gt;&lt;BLOCKQUOTE class="jive_macro_quote jive-quote jive_text_macro"&gt;&lt;P&gt;root@arm:~# reboot&lt;BR /&gt;[ OK ] Stopped target Timers.&lt;BR /&gt; Stopping User Manager for UID 0...&lt;BR /&gt; Stopping Authorization Manager...&lt;BR /&gt; Starting Unattended Upgrades...&lt;BR /&gt; Stopping Session c1 of user hermes.&lt;BR /&gt; Stopping User Manager for UID 1001...&lt;BR /&gt;[ OK ] Stopped Daily Cleanup of Temporary Directories.&lt;BR /&gt; Stopping Disk Manager...&lt;BR /&gt;[ OK ] Stopped target Graphical Interface.&lt;BR /&gt; Stopping Light Display Manager...&lt;BR /&gt;[ OK ] Stopped target Multi-User System.&lt;BR /&gt; Stopping OpenBSD Secure Shell server...&lt;BR /&gt; Stopping Avahi mDNS/DNS-SD Stack...&lt;BR /&gt; Stopping LSB: Apache2 web server...&lt;BR /&gt; Stopping Modem Manager...&lt;BR /&gt; Stopping LSB: set CPUFreq kernel parameters...&lt;BR /&gt; Stopping LSB: Start busybox udhcpd at boot time...&lt;BR /&gt; Stopping LSB: Advanced IEEE 802.11 management daemon...&lt;BR /&gt; Stopping D-Bus System Message Bus...&lt;BR /&gt; Stopping Regular background program processing daemon...&lt;BR /&gt; Stopping Stopping Session c2 of user root.&lt;BR /&gt; Stopping LSB: Starts and stops Wicd...&lt;BR /&gt;[ OK ] Stopped target Login Prompts.&lt;BR /&gt; Stopping Serial Getty on ttymxc0...&lt;BR /&gt; Stopping Getty on tty1...&lt;BR /&gt;[ OK ] Stopped Modem Manager.&lt;BR /&gt;[ OK ] Stopped Avahi mDNS/DNS-SD Stack.&lt;BR /&gt;[ OK ] Stopped OpenBSD Secure Shell server.&lt;BR /&gt;[ OK ] Stopped Regular background program processing daemon.&lt;BR /&gt;[ OK ] Stopped System Logging Service.&lt;BR /&gt;[ 1961.034311] imx-ipuv3 2400000.ipu: WARNING: adapt panel end blank lines&lt;BR /&gt;[ OK ] Stopped D-Bus System Message Bus.&lt;BR /&gt;[ 1961.176691] imx-ipuv3 2400000.ipu: WARNING: adapt panel end blank lines&lt;BR /&gt;[ OK ] Stopped Authorization Manager.&lt;BR /&gt;[ OK ] Stopped Serial Getty on ttymxc0.&lt;BR /&gt;[ OK ] Stopped Getty on tty1.&lt;BR /&gt;[ OK ] Stopped Light Display Manager.&lt;BR /&gt;[ OK ] Stopped User Manager for UID 1001.&lt;BR /&gt;[ OK ] Stopped Disk Manager.&lt;BR /&gt;[ OK ] Stopped User Manager for UID 0.&lt;BR /&gt;[ OK ] Stopped Session c1 of user hermes.&lt;BR /&gt;[ OK ] Stopped LSB: Advanced IEEE 802.11 management daemon.&lt;BR /&gt;[ OK ] Started Unattended Upgrades.&lt;BR /&gt;[ OK ] Stopped Session c2 of user root.&lt;BR /&gt;[ OK ] Stopped LSB: Start busybox udhcpd at boot time.&lt;BR /&gt;[ OK ] Stopped LSB: set CPUFreq kernel parameters.&lt;BR /&gt; Stopping LSB: Load kernel modules needed to enable cpufreq scaling...&lt;BR /&gt;[ OK ] Removed slice User Slice of root.&lt;BR /&gt;[ OK ] Removed slice User Slice of hermes.&lt;BR /&gt; Stopping Login Service...&lt;BR /&gt;[ OK ] Removed slice system-getty.slice.&lt;BR /&gt; Stopping Permit User Sessions...&lt;BR /&gt;[ OK ] Removed slice system-serial\x2dgetty.slice.&lt;BR /&gt;[ OK ] Stopped /etc/rc.local Compatibility.&lt;BR /&gt;[ OK ] Stopped Login Service.&lt;BR /&gt;[ OK ] Stopped LSB: Starts and stops Wicd.&lt;BR /&gt;[ OK ] Stopped Permit User Sessions.&lt;BR /&gt;[ OK ] Stopped LSB: Load kernel modules needed to enable cpufreq scaling.&lt;BR /&gt;[ OK ] Stopped LSB: Apache2 web server.&lt;BR /&gt;[ OK ] Stopped target Basic System.&lt;BR /&gt;[ OK ] Stopped target Paths.&lt;BR /&gt;[ OK ] Stopped Dispatch Password Requests to Console Directory Watch.&lt;BR /&gt;[ OK ] Stopped Forward Password Requests to Wall Directory Watch.&lt;BR /&gt;[ OK ] Stopped target Sockets.&lt;BR /&gt;[ OK ] Closed Avahi mDNS/DNS-SD Stack Activation Socket.&lt;BR /&gt;[ OK ] Closed D-Bus System Message Bus Socket.&lt;BR /&gt;[ OK ] Closed Syslog Socket.&lt;BR /&gt;[ OK ] Stopped target Slices.&lt;BR /&gt;[ OK ] Removed slice User and Session Slice.&lt;BR /&gt;[ OK ] Stopped target Remote File Systems.&lt;BR /&gt;[ OK ] Stopped target Remote File Systems (Pre).&lt;BR /&gt;[ OK ] Stopped target System Initialization.&lt;BR /&gt;[ OK ] Stopped target Encrypted Volumes.&lt;BR /&gt; Stopping LSB: NFS support files common to client and server...&lt;BR /&gt; Stopping Load/Save Random Seed...&lt;BR /&gt;[ OK ] Stopped target Swap.&lt;BR /&gt;[ OK ] Stopped Load/Save Random Seed.&lt;BR /&gt;[ OK ] Unmounted /run/rpc_pipefs.&lt;BR /&gt;[ OK ] Stopped LSB: NFS support files common to client and server.&lt;BR /&gt;[ OK ] Stopped target System Time Synchronized.&lt;BR /&gt; Stopping Network Time Synchronization...&lt;BR /&gt;[ OK ] Stopped target RPC Port Mapper.&lt;BR /&gt; Stopping LSB: RPC portmapper replacement...&lt;BR /&gt;[ OK ] Stopped Network Time Synchronization.&lt;BR /&gt;[ OK ] Stopped Create Volatile Files and Directories.&lt;BR /&gt;[ OK ] Stopped LSB: RPC portmapper replacement.&lt;BR /&gt;[ OK ] Stopped target Network is Online.&lt;BR /&gt;[ OK ] Stopped target Network.&lt;BR /&gt; Stopping Raise network interfaces...&lt;BR /&gt;[ OK ] Stopped Raise network interfaces.&lt;BR /&gt;[ OK ] Stopped Apply Kernel Variables.&lt;BR /&gt;[ OK ] Stopped target Local File Systems.&lt;BR /&gt; Unmounting /run/user/0...&lt;BR /&gt; Unmounting /run/user/1001...&lt;BR /&gt; Unmounting /media/hermes/002D-F50C...&lt;BR /&gt;[ OK ] Unmounted /run/user/0.&lt;BR /&gt;[ OK ] Unmounted /run/user/1001.&lt;BR /&gt;[ OK ] Unmounted /media/hermes/002D-F50C.&lt;BR /&gt;[ OK ] Reached target Unmount All Filesystems.&lt;BR /&gt;[ OK ] Stopped target Local File Systems (Pre).&lt;BR /&gt;[ OK ] Stopped Create Static Device Nodes in /dev.&lt;BR /&gt;[ OK ] Stopped Remount Root and Kernel File Systems.&lt;BR /&gt;[ OK ] Reached target Shutdown.&lt;BR /&gt;[ 1966.916231] systemd-shutdown[1]: Sending SIGTERM to remaining processes...&lt;BR /&gt;[ 1966.939626] systemd-journald[183]: Received SIGTERM from PID 1 (systemd-shutdow).&lt;BR /&gt;[ 1966.984871] systemd-shutdown[1]: Sending SIGKILL to remaining processes...&lt;BR /&gt;[ 1967.006239] systemd-shutdown[1]: Hardware watchdog 'imx2+ watchdog', version 0&lt;BR /&gt;[ 1967.014752] systemd-shutdown[1]: Unmounting file systems.&lt;BR /&gt;[ 1967.020687] systemd-shutdown[1]: Remounting '/' read-only with options 'data=ordered'.&lt;BR /&gt;[ 1967.115775] EXT4-fs (mmcblk3p2): re-mounted. Opts: data=ordered&lt;BR /&gt;[ 1967.147271] systemd-shutdown[1]: Remounting '/' read-only with options 'data=ordered'.&lt;BR /&gt;[ 1967.155680] EXT4-fs (mmcblk3p2): re-mounted. Opts: data=ordered&lt;BR /&gt;[ 1967.161727] systemd-shutdown[1]: All filesystems unmounted.&lt;BR /&gt;[ 1967.167423] systemd-shutdown[1]: Deactivating swaps.&lt;BR /&gt;[ 1967.172784] systemd-shutdown[1]: All swaps deactivated.&lt;BR /&gt;[ 1967.178408] systemd-shutdown[1]: Detaching loop devices.&lt;BR /&gt;[ 1967.203526] systemd-shutdown[1]: All loop devices detached.&lt;BR /&gt;[ 1967.209509] systemd-shutdown[1]: Detaching DM devices.&lt;BR /&gt;[ 1967.215642] systemd-shutdown[1]: All DM devices detached.&lt;BR /&gt;[ 1967.228790] systemd-shutdown[1]: Failed to read reboot parameter file: No such file or directory&lt;BR /&gt;[ 1967.237662] systemd-shutdown[1]: Rebooting.&lt;BR /&gt;[ 1967.241858] reboot: winmate victor LINUX_REBOOT_CMD_RESTART&lt;BR /&gt;[ 1968.255339] sd 0:0:0:0: [sda] Synchronizing SCSI cache&lt;BR /&gt;[ 1968.261816] imx2-wdt 20c0000.wdog: Device shutdown: Expect reboot!&lt;BR /&gt;[ 1968.268248] PM: winmate victor PMIC not shutdown&lt;BR /&gt;[ 1968.272891] PM: winmate victor PMIC not shutdown&lt;BR /&gt;[ 1968.277560] PM: winmate victor PMIC not shutdown&lt;BR /&gt;[ 1968.282198] PM: winmate victor PMIC not shutdown&lt;BR /&gt;[ 1968.286861] PM: winmate victor PMIC not shutdown&lt;BR /&gt;[ 1968.291496] PM: winmate victor PMIC not shutdown&lt;BR /&gt;[ 1968.296160] PM: winmate victor PMIC not shutdown&lt;BR /&gt;[ 1968.300795] reboot: winmate victor Restarting system&lt;BR /&gt;[ 1968.305813] winmate victor do kernel restart&lt;/P&gt;&lt;/BLOCKQUOTE&gt;&lt;P&gt;&lt;/P&gt;&lt;P&gt;Before I do reboot command I saw that uboot setting showed Reset cause: POR&lt;/P&gt;&lt;BLOCKQUOTE class="jive_macro_quote jive-quote jive_text_macro"&gt;&lt;P&gt;U-Boot 2015.04imx_v2015.04_4.1.15_1.2.0_ga+ge1eae17 (Mar 15 2017 - 19:44:21)&lt;/P&gt;&lt;P&gt;CPU: Freescale i.MX6DL rev1.3 at 792 MHz&lt;BR /&gt;CPU: Temperature 43 C&lt;BR /&gt;Reset cause: POR&lt;BR /&gt;Board: MX6-SabreSD&lt;BR /&gt;I2C: ready&lt;BR /&gt;DRAM: 2 GiB&lt;BR /&gt;PMIC: PFUZE100 ID=0x10&lt;BR /&gt;MMC: FSL_SDHC: 0, FSL_SDHC: 1, FSL_SDHC: 2&lt;/P&gt;&lt;/BLOCKQUOTE&gt;&lt;P&gt;&lt;/P&gt;&lt;P&gt;I tried to measure three signals of PMIC Control like below.&lt;/P&gt;&lt;OL&gt;&lt;LI&gt;STANDBY&lt;/LI&gt;&lt;LI&gt;&amp;nbsp;PWRON(connect to &lt;SPAN&gt;WDOG_B&amp;nbsp;&lt;/SPAN&gt;)&lt;/LI&gt;&lt;LI&gt;SW2(gen33 which is EMMC power)&lt;/LI&gt;&lt;/OL&gt;&lt;P&gt;&lt;span class="lia-inline-image-display-wrapper" image-alt="999.jpg"&gt;&lt;img src="https://community.nxp.com/t5/image/serverpage/image-id/79670i6C365A5A86DBBF48/image-size/large?v=v2&amp;amp;px=999" role="button" title="999.jpg" alt="999.jpg" /&gt;&lt;/span&gt;&lt;/P&gt;&lt;P&gt;&lt;/P&gt;&lt;P&gt;Assuming that main reason why system cannot restart after reboot is because when&amp;nbsp;&lt;SPAN&gt;WDOG_B&amp;nbsp;reset then pwron reset too.&lt;/SPAN&gt;&lt;/P&gt;&lt;P&gt;&lt;SPAN&gt;And when pwron reset will cause standby signal high then SW2 will be low-high once.&lt;/SPAN&gt;&lt;/P&gt;&lt;P&gt;&lt;SPAN&gt;Because of this cpu cannot recognize Emmc so the machine be handed like picture above.&lt;/SPAN&gt;&lt;/P&gt;&lt;P&gt;&lt;/P&gt;&lt;P&gt;&lt;SPAN&gt;Is anything I missed and how can I fix this problem?&lt;/SPAN&gt;&lt;/P&gt;&lt;P&gt;&lt;/P&gt;&lt;P&gt;&lt;/P&gt;&lt;P&gt;&lt;/P&gt;&lt;/BODY&gt;&lt;/HTML&gt;</description>
    <pubDate>Mon, 06 Aug 2018 08:28:13 GMT</pubDate>
    <dc:creator>wangvictor</dc:creator>
    <dc:date>2018-08-06T08:28:13Z</dc:date>
    <item>
      <title>System be hanged after reboot command</title>
      <link>https://community.nxp.com/t5/i-MX-Processors/System-be-hanged-after-reboot-command/m-p/823824#M126699</link>
      <description>&lt;HTML&gt;&lt;HEAD&gt;&lt;/HEAD&gt;&lt;BODY&gt;&lt;P&gt;Hi Community,&lt;/P&gt;&lt;P&gt;&lt;/P&gt;&lt;P&gt;I'm working on i.MX6 sabreSD DL and using linux kernel L4.1.15.&lt;/P&gt;&lt;P&gt;&lt;/P&gt;&lt;P&gt;My hardware designed will connect WDOG_B to PMIC Control PWRON.&lt;/P&gt;&lt;P&gt;&lt;/P&gt;&lt;P&gt;After I send reboot command WDOG_B will reset and cause PMIC Control PWRON reset too.&lt;/P&gt;&lt;P&gt;&lt;/P&gt;&lt;P&gt;Then the system be hanged like below log.&lt;/P&gt;&lt;BLOCKQUOTE class="jive_macro_quote jive-quote jive_text_macro"&gt;&lt;P&gt;root@arm:~# reboot&lt;BR /&gt;[ OK ] Stopped target Timers.&lt;BR /&gt; Stopping User Manager for UID 0...&lt;BR /&gt; Stopping Authorization Manager...&lt;BR /&gt; Starting Unattended Upgrades...&lt;BR /&gt; Stopping Session c1 of user hermes.&lt;BR /&gt; Stopping User Manager for UID 1001...&lt;BR /&gt;[ OK ] Stopped Daily Cleanup of Temporary Directories.&lt;BR /&gt; Stopping Disk Manager...&lt;BR /&gt;[ OK ] Stopped target Graphical Interface.&lt;BR /&gt; Stopping Light Display Manager...&lt;BR /&gt;[ OK ] Stopped target Multi-User System.&lt;BR /&gt; Stopping OpenBSD Secure Shell server...&lt;BR /&gt; Stopping Avahi mDNS/DNS-SD Stack...&lt;BR /&gt; Stopping LSB: Apache2 web server...&lt;BR /&gt; Stopping Modem Manager...&lt;BR /&gt; Stopping LSB: set CPUFreq kernel parameters...&lt;BR /&gt; Stopping LSB: Start busybox udhcpd at boot time...&lt;BR /&gt; Stopping LSB: Advanced IEEE 802.11 management daemon...&lt;BR /&gt; Stopping D-Bus System Message Bus...&lt;BR /&gt; Stopping Regular background program processing daemon...&lt;BR /&gt; Stopping Stopping Session c2 of user root.&lt;BR /&gt; Stopping LSB: Starts and stops Wicd...&lt;BR /&gt;[ OK ] Stopped target Login Prompts.&lt;BR /&gt; Stopping Serial Getty on ttymxc0...&lt;BR /&gt; Stopping Getty on tty1...&lt;BR /&gt;[ OK ] Stopped Modem Manager.&lt;BR /&gt;[ OK ] Stopped Avahi mDNS/DNS-SD Stack.&lt;BR /&gt;[ OK ] Stopped OpenBSD Secure Shell server.&lt;BR /&gt;[ OK ] Stopped Regular background program processing daemon.&lt;BR /&gt;[ OK ] Stopped System Logging Service.&lt;BR /&gt;[ 1961.034311] imx-ipuv3 2400000.ipu: WARNING: adapt panel end blank lines&lt;BR /&gt;[ OK ] Stopped D-Bus System Message Bus.&lt;BR /&gt;[ 1961.176691] imx-ipuv3 2400000.ipu: WARNING: adapt panel end blank lines&lt;BR /&gt;[ OK ] Stopped Authorization Manager.&lt;BR /&gt;[ OK ] Stopped Serial Getty on ttymxc0.&lt;BR /&gt;[ OK ] Stopped Getty on tty1.&lt;BR /&gt;[ OK ] Stopped Light Display Manager.&lt;BR /&gt;[ OK ] Stopped User Manager for UID 1001.&lt;BR /&gt;[ OK ] Stopped Disk Manager.&lt;BR /&gt;[ OK ] Stopped User Manager for UID 0.&lt;BR /&gt;[ OK ] Stopped Session c1 of user hermes.&lt;BR /&gt;[ OK ] Stopped LSB: Advanced IEEE 802.11 management daemon.&lt;BR /&gt;[ OK ] Started Unattended Upgrades.&lt;BR /&gt;[ OK ] Stopped Session c2 of user root.&lt;BR /&gt;[ OK ] Stopped LSB: Start busybox udhcpd at boot time.&lt;BR /&gt;[ OK ] Stopped LSB: set CPUFreq kernel parameters.&lt;BR /&gt; Stopping LSB: Load kernel modules needed to enable cpufreq scaling...&lt;BR /&gt;[ OK ] Removed slice User Slice of root.&lt;BR /&gt;[ OK ] Removed slice User Slice of hermes.&lt;BR /&gt; Stopping Login Service...&lt;BR /&gt;[ OK ] Removed slice system-getty.slice.&lt;BR /&gt; Stopping Permit User Sessions...&lt;BR /&gt;[ OK ] Removed slice system-serial\x2dgetty.slice.&lt;BR /&gt;[ OK ] Stopped /etc/rc.local Compatibility.&lt;BR /&gt;[ OK ] Stopped Login Service.&lt;BR /&gt;[ OK ] Stopped LSB: Starts and stops Wicd.&lt;BR /&gt;[ OK ] Stopped Permit User Sessions.&lt;BR /&gt;[ OK ] Stopped LSB: Load kernel modules needed to enable cpufreq scaling.&lt;BR /&gt;[ OK ] Stopped LSB: Apache2 web server.&lt;BR /&gt;[ OK ] Stopped target Basic System.&lt;BR /&gt;[ OK ] Stopped target Paths.&lt;BR /&gt;[ OK ] Stopped Dispatch Password Requests to Console Directory Watch.&lt;BR /&gt;[ OK ] Stopped Forward Password Requests to Wall Directory Watch.&lt;BR /&gt;[ OK ] Stopped target Sockets.&lt;BR /&gt;[ OK ] Closed Avahi mDNS/DNS-SD Stack Activation Socket.&lt;BR /&gt;[ OK ] Closed D-Bus System Message Bus Socket.&lt;BR /&gt;[ OK ] Closed Syslog Socket.&lt;BR /&gt;[ OK ] Stopped target Slices.&lt;BR /&gt;[ OK ] Removed slice User and Session Slice.&lt;BR /&gt;[ OK ] Stopped target Remote File Systems.&lt;BR /&gt;[ OK ] Stopped target Remote File Systems (Pre).&lt;BR /&gt;[ OK ] Stopped target System Initialization.&lt;BR /&gt;[ OK ] Stopped target Encrypted Volumes.&lt;BR /&gt; Stopping LSB: NFS support files common to client and server...&lt;BR /&gt; Stopping Load/Save Random Seed...&lt;BR /&gt;[ OK ] Stopped target Swap.&lt;BR /&gt;[ OK ] Stopped Load/Save Random Seed.&lt;BR /&gt;[ OK ] Unmounted /run/rpc_pipefs.&lt;BR /&gt;[ OK ] Stopped LSB: NFS support files common to client and server.&lt;BR /&gt;[ OK ] Stopped target System Time Synchronized.&lt;BR /&gt; Stopping Network Time Synchronization...&lt;BR /&gt;[ OK ] Stopped target RPC Port Mapper.&lt;BR /&gt; Stopping LSB: RPC portmapper replacement...&lt;BR /&gt;[ OK ] Stopped Network Time Synchronization.&lt;BR /&gt;[ OK ] Stopped Create Volatile Files and Directories.&lt;BR /&gt;[ OK ] Stopped LSB: RPC portmapper replacement.&lt;BR /&gt;[ OK ] Stopped target Network is Online.&lt;BR /&gt;[ OK ] Stopped target Network.&lt;BR /&gt; Stopping Raise network interfaces...&lt;BR /&gt;[ OK ] Stopped Raise network interfaces.&lt;BR /&gt;[ OK ] Stopped Apply Kernel Variables.&lt;BR /&gt;[ OK ] Stopped target Local File Systems.&lt;BR /&gt; Unmounting /run/user/0...&lt;BR /&gt; Unmounting /run/user/1001...&lt;BR /&gt; Unmounting /media/hermes/002D-F50C...&lt;BR /&gt;[ OK ] Unmounted /run/user/0.&lt;BR /&gt;[ OK ] Unmounted /run/user/1001.&lt;BR /&gt;[ OK ] Unmounted /media/hermes/002D-F50C.&lt;BR /&gt;[ OK ] Reached target Unmount All Filesystems.&lt;BR /&gt;[ OK ] Stopped target Local File Systems (Pre).&lt;BR /&gt;[ OK ] Stopped Create Static Device Nodes in /dev.&lt;BR /&gt;[ OK ] Stopped Remount Root and Kernel File Systems.&lt;BR /&gt;[ OK ] Reached target Shutdown.&lt;BR /&gt;[ 1966.916231] systemd-shutdown[1]: Sending SIGTERM to remaining processes...&lt;BR /&gt;[ 1966.939626] systemd-journald[183]: Received SIGTERM from PID 1 (systemd-shutdow).&lt;BR /&gt;[ 1966.984871] systemd-shutdown[1]: Sending SIGKILL to remaining processes...&lt;BR /&gt;[ 1967.006239] systemd-shutdown[1]: Hardware watchdog 'imx2+ watchdog', version 0&lt;BR /&gt;[ 1967.014752] systemd-shutdown[1]: Unmounting file systems.&lt;BR /&gt;[ 1967.020687] systemd-shutdown[1]: Remounting '/' read-only with options 'data=ordered'.&lt;BR /&gt;[ 1967.115775] EXT4-fs (mmcblk3p2): re-mounted. Opts: data=ordered&lt;BR /&gt;[ 1967.147271] systemd-shutdown[1]: Remounting '/' read-only with options 'data=ordered'.&lt;BR /&gt;[ 1967.155680] EXT4-fs (mmcblk3p2): re-mounted. Opts: data=ordered&lt;BR /&gt;[ 1967.161727] systemd-shutdown[1]: All filesystems unmounted.&lt;BR /&gt;[ 1967.167423] systemd-shutdown[1]: Deactivating swaps.&lt;BR /&gt;[ 1967.172784] systemd-shutdown[1]: All swaps deactivated.&lt;BR /&gt;[ 1967.178408] systemd-shutdown[1]: Detaching loop devices.&lt;BR /&gt;[ 1967.203526] systemd-shutdown[1]: All loop devices detached.&lt;BR /&gt;[ 1967.209509] systemd-shutdown[1]: Detaching DM devices.&lt;BR /&gt;[ 1967.215642] systemd-shutdown[1]: All DM devices detached.&lt;BR /&gt;[ 1967.228790] systemd-shutdown[1]: Failed to read reboot parameter file: No such file or directory&lt;BR /&gt;[ 1967.237662] systemd-shutdown[1]: Rebooting.&lt;BR /&gt;[ 1967.241858] reboot: winmate victor LINUX_REBOOT_CMD_RESTART&lt;BR /&gt;[ 1968.255339] sd 0:0:0:0: [sda] Synchronizing SCSI cache&lt;BR /&gt;[ 1968.261816] imx2-wdt 20c0000.wdog: Device shutdown: Expect reboot!&lt;BR /&gt;[ 1968.268248] PM: winmate victor PMIC not shutdown&lt;BR /&gt;[ 1968.272891] PM: winmate victor PMIC not shutdown&lt;BR /&gt;[ 1968.277560] PM: winmate victor PMIC not shutdown&lt;BR /&gt;[ 1968.282198] PM: winmate victor PMIC not shutdown&lt;BR /&gt;[ 1968.286861] PM: winmate victor PMIC not shutdown&lt;BR /&gt;[ 1968.291496] PM: winmate victor PMIC not shutdown&lt;BR /&gt;[ 1968.296160] PM: winmate victor PMIC not shutdown&lt;BR /&gt;[ 1968.300795] reboot: winmate victor Restarting system&lt;BR /&gt;[ 1968.305813] winmate victor do kernel restart&lt;/P&gt;&lt;/BLOCKQUOTE&gt;&lt;P&gt;&lt;/P&gt;&lt;P&gt;Before I do reboot command I saw that uboot setting showed Reset cause: POR&lt;/P&gt;&lt;BLOCKQUOTE class="jive_macro_quote jive-quote jive_text_macro"&gt;&lt;P&gt;U-Boot 2015.04imx_v2015.04_4.1.15_1.2.0_ga+ge1eae17 (Mar 15 2017 - 19:44:21)&lt;/P&gt;&lt;P&gt;CPU: Freescale i.MX6DL rev1.3 at 792 MHz&lt;BR /&gt;CPU: Temperature 43 C&lt;BR /&gt;Reset cause: POR&lt;BR /&gt;Board: MX6-SabreSD&lt;BR /&gt;I2C: ready&lt;BR /&gt;DRAM: 2 GiB&lt;BR /&gt;PMIC: PFUZE100 ID=0x10&lt;BR /&gt;MMC: FSL_SDHC: 0, FSL_SDHC: 1, FSL_SDHC: 2&lt;/P&gt;&lt;/BLOCKQUOTE&gt;&lt;P&gt;&lt;/P&gt;&lt;P&gt;I tried to measure three signals of PMIC Control like below.&lt;/P&gt;&lt;OL&gt;&lt;LI&gt;STANDBY&lt;/LI&gt;&lt;LI&gt;&amp;nbsp;PWRON(connect to &lt;SPAN&gt;WDOG_B&amp;nbsp;&lt;/SPAN&gt;)&lt;/LI&gt;&lt;LI&gt;SW2(gen33 which is EMMC power)&lt;/LI&gt;&lt;/OL&gt;&lt;P&gt;&lt;span class="lia-inline-image-display-wrapper" image-alt="999.jpg"&gt;&lt;img src="https://community.nxp.com/t5/image/serverpage/image-id/79670i6C365A5A86DBBF48/image-size/large?v=v2&amp;amp;px=999" role="button" title="999.jpg" alt="999.jpg" /&gt;&lt;/span&gt;&lt;/P&gt;&lt;P&gt;&lt;/P&gt;&lt;P&gt;Assuming that main reason why system cannot restart after reboot is because when&amp;nbsp;&lt;SPAN&gt;WDOG_B&amp;nbsp;reset then pwron reset too.&lt;/SPAN&gt;&lt;/P&gt;&lt;P&gt;&lt;SPAN&gt;And when pwron reset will cause standby signal high then SW2 will be low-high once.&lt;/SPAN&gt;&lt;/P&gt;&lt;P&gt;&lt;SPAN&gt;Because of this cpu cannot recognize Emmc so the machine be handed like picture above.&lt;/SPAN&gt;&lt;/P&gt;&lt;P&gt;&lt;/P&gt;&lt;P&gt;&lt;SPAN&gt;Is anything I missed and how can I fix this problem?&lt;/SPAN&gt;&lt;/P&gt;&lt;P&gt;&lt;/P&gt;&lt;P&gt;&lt;/P&gt;&lt;P&gt;&lt;/P&gt;&lt;/BODY&gt;&lt;/HTML&gt;</description>
      <pubDate>Mon, 06 Aug 2018 08:28:13 GMT</pubDate>
      <guid>https://community.nxp.com/t5/i-MX-Processors/System-be-hanged-after-reboot-command/m-p/823824#M126699</guid>
      <dc:creator>wangvictor</dc:creator>
      <dc:date>2018-08-06T08:28:13Z</dc:date>
    </item>
    <item>
      <title>Re: System be hanged after reboot command</title>
      <link>https://community.nxp.com/t5/i-MX-Processors/System-be-hanged-after-reboot-command/m-p/823825#M126700</link>
      <description>&lt;HTML&gt;&lt;HEAD&gt;&lt;/HEAD&gt;&lt;BODY&gt;&lt;P&gt;Hi victor&lt;/P&gt;&lt;P&gt;&lt;/P&gt;&lt;P&gt;reason may be both hardware and software, so for narrow downing issue one&lt;/P&gt;&lt;P&gt;can try to reproduce issue on NXP Sabre SD reference board and try with&lt;/P&gt;&lt;P&gt;Demo Images from link&lt;/P&gt;&lt;P&gt;&lt;A class="link-titled" href="https://www.nxp.com/support/developer-resources/run-time-software/i.mx-developer-resources/i.mx-6series-i.mx-7series-software-and-development-tool-resources:IMX_SW" title="https://www.nxp.com/support/developer-resources/run-time-software/i.mx-developer-resources/i.mx-6series-i.mx-7series-software-and-development-tool-resources:IMX_SW"&gt;i.MX Software|NXP&lt;/A&gt;&amp;nbsp;&lt;/P&gt;&lt;P&gt;Also if there is no attached coincell to pmic licell, one can try with coincell.&lt;/P&gt;&lt;P&gt;&lt;/P&gt;&lt;P&gt;Best regards&lt;BR /&gt;igor&lt;BR /&gt;-----------------------------------------------------------------------------------------------------------------------&lt;BR /&gt;Note: If this post answers your question, please click the Correct Answer button. Thank you!&lt;BR /&gt;-----------------------------------------------------------------------------------------------------------------------&lt;/P&gt;&lt;/BODY&gt;&lt;/HTML&gt;</description>
      <pubDate>Tue, 07 Aug 2018 01:13:26 GMT</pubDate>
      <guid>https://community.nxp.com/t5/i-MX-Processors/System-be-hanged-after-reboot-command/m-p/823825#M126700</guid>
      <dc:creator>igorpadykov</dc:creator>
      <dc:date>2018-08-07T01:13:26Z</dc:date>
    </item>
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