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I am trying to achieve PXE Boot and install the Yocto Image on my intel Apollo Lake SoC.

What i did till now:

Created EFI/SYSLINUX Folder and placed syslinux.efi and ldlinux.e64, menu.c32 and in this folder created pxelinux.cfg folder and created "default file" with the following content:

serial 0 115200
ALLOWOPTIONS 1
SERIAL 0 115200
DEFAULT Serial console install
TIMEOUT 500
TOTALTIMEOUT 501
PROMPT 0
ui menu.c32
menu title Select kernel options and boot kernel
menu tabmsg Press [Tab] to edit, [Return] to select
LABEL Serial console install
KERNEL bzImage
APPEND initrd=initrd LABEL=install root=/dev/ram0  rootwait console=ttyS0,115200 console=tty0 console=ttyS0,115200

The system boots and displays the UI and starts loading bzImage over tftp and then while it is loading initrd image the system is reset.. It happens every time and I am thinking something related to timing may be every 5 minutes it restarts.

I am using syslinux 6.3.0 , what can be the issue here

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If SoC reboots each time after exactly same amount of time, I suppose that problem may be related to watchdog timer. Check kernel output for something like:

iTCO_wdt: Intel TCO WatchDog Timer Driver v1.11
iTCO_wdt: Found a Apollo Lake SoC TCO device (Version=5, TCOBASE=0x0460)
iTCO_wdt: initialized. heartbeat=30 sec (nowayout=0)

There you can find more info about configuring watchdog: http://www.fit-pc.com/wiki/index.php/Linux_Mint:_Watchdog_configuration

  • No, the kernel is still not loaded at that time, it is still in the phase of loading initrd over tftp and store it in RAM – md.jamal Nov 21 '18 at 15:51
  • What happens if you don't specify initrd at all? Is kernel tries to boot? – IvanBayan Nov 22 '18 at 11:44

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