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Running VS demo in 814x showing unstable messages

i'm using the 814x EVM to run the VS demo,when the kernel is ready,and i can log in the system ,at the time of running the demo:it shows :

and it sometimes works ,sometimes like these below:

Can anyone help me??it really drive me mad...

 

root@dm814x-evm:~/vs# root@dm814x-evm:~/vs# ./prcm_config_app s

/dev/mem opened.

Doing GEL setting...

CortxA8: Output:     PRCM for IVHD0 is in Progress, Please wait.....  

             BW Phy Addr : 0x48180600 Data : 0x00000002

             AW Phy Addr : 0x48180600 Data : 0x00000002

             Phy Addr : 0x48180c04 Data : 0x00000037

             BW Phy Addr : 0x48180620 Data : 0x00070000

             AW Phy Addr : 0x48180620 Data : 0x00070002

             BW Phy Addr : 0x48180624 Data : 0x00030000

             AW Phy Addr : 0x48180624 Data : 0x00010002

             Phy Addr : 0x48180600 Data : 0x00000102

             BW Phy Addr : 0x48180c10 Data : 0x00000007

             AW Phy Addr : 0x48180c10 Data : 0x00000003

             Phy Addr : 0x48180c14 Data : 0x00000007

             Phy Addr : 0x48180c14 Data : 0x00000007

             Phy Addr : 0x48180c14 Data : 0x00000007

             Phy Addr : 0x48180c14 Data : 0x00000007

             Phy Addr : 0x48180c14 Data : 0x00000007

             Phy Addr : 0x48180c14 Data : 0x00000007

             Phy Addr : 0x48180c14 Data : 0x00000007

             Phy Addr : 0x48180c14 Data : 0x00000007

             Phy Addr : 0x48180c14 Data : 0x00000007

             Phy Addr : 0x48180c14 Data : 0x00000007

             Phy Addr : 0x48180c14 Data : 0x00000007