Kernel panic - not syncing: No working init found

Question

I'm trying to work a Linaro Ubuntu desktop on a zynq 7000 through an SD Card. After making the two partitions on the SD card and inserting in the FPGA, I get this message on my host PC (linked to the card through a serial port using UART) :

EXT4-fs (mmcblk0p2): recovery complete
EXT4-fs (mmcblk0p2): mounted filesystem with ordered data mode. Opts: (null)
VFS: Mounted root (ext4 filesystem) on device 179:2.
devtmpfs: error mounting -2
Freeing unused kernel memory: 244K (c067b000 - c06b8000)
Kernel panic - not syncing: No working init found.  Try passing init= option to kernel. See Linux Documentation/init.txt for guidance.
CPU: 1 PID: 1 Comm: swapper/0 Not tainted 4.4.0-g7565292 #1
Hardware name: Xilinx Zynq Platform
[<c0015388>] (unwind_backtrace) from [<c0011fdc>] (show_stack+0x10/0x14)
[<c0011fdc>] (show_stack) from [<c01a8880>] (dump_stack+0x80/0xcc)
[<c01a8880>] (dump_stack) from [<c0092bb0>] (panic+0x84/0x1fc)
[<c0092bb0>] (panic) from [<c046da5c>] (kernel_init+0xb8/0xe4)
[<c046da5c>] (kernel_init) from [<c000f1b8>] (ret_from_fork+0x14/0x3c)
CPU0: stopping
CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.4.0-g7565292 #1
Hardware name: Xilinx Zynq Platform
[<c0015388>] (unwind_backtrace) from [<c0011fdc>] (show_stack+0x10/0x14)
[<c0011fdc>] (show_stack) from [<c01a8880>] (dump_stack+0x80/0xcc)
[<c01a8880>] (dump_stack) from [<c0013be4>] (ipi_cpu_stop+0x3c/0x6c)
[<c0013be4>] (ipi_cpu_stop) from [<c00142e4>] (handle_IPI+0x5c/0x7c)
[<c00142e4>] (handle_IPI) from [<c00093e0>] (gic_handle_irq+0x74/0x90)
[<c00093e0>] (gic_handle_irq) from [<c0012a94>] (__irq_svc+0x54/0x90)
Exception stack(0xc06b9f38 to 0xc06b9f80)
9f20:                                                       00000000 00000000
9f40: 1f4e0000 dfb95dc0 67b69607 00000000 67dd2149 00000000 dfb95450 00000000
9f60: 00000000 00000000 00000008 c06b9f88 c031d9fc c031da44 60000113 ffffffff
[<c0012a94>] (__irq_svc) from [<c031da44>] (cpuidle_enter_state+0xfc/0x1f4)
[<c031da44>] (cpuidle_enter_state) from [<c00518f8>]  (cpu_startup_entry+0x1a0/0x230)
[<c00518f8>] (cpu_startup_entry) from [<c067bc18>] (start_kernel+0x364/0x3d0)
---[ end Kernel panic - not syncing: No working init found.  Try passing init= option to kernel. See Linux Documentation/init.txt for guidance.  

And the VGA-connected monitor does not display anything. Can someone help me understanding the cause of this problem?

Solution

The error tells you that the system cannot find init.

The system could not mount your drive hence the error devtmpfs: error mounting -2

Your files might be corrupted or your SD card is not recognized and connected properly.

You might need take a look at your file system. Make sure that all the folders like /bin /boot /dev /etc /home /install /lib ... are all in / . Remove the extra directory if you have it.