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E3800 CPU hung without any logs

idata
Employee
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[configuration]

device hardware:

CPU: E3827 running in 1.74GHz

Memory: DDR3 2GB 1333

storage: SSD

MIPI CSI used to import another video

device software:

OS: Linux 3.8.0

X.Org X Server 1.13.3, X protocol ver 11, rev 0

EMGD driver 2.0.3790

CSI driver isp 3.01

[bug]

An application running with composing video from CSI for several days or more, software(including linux) down was found 1~2 times in 5~10 devices, screen is black with some lines flash, mouse and keyboard is not functioned, no output in debug UART, no data traffic in network output, when connecting the faulted device in a switch, network communication will be broken for all other normal devices in the same switch. No log found in linux when restart the device. the CPU temperature is normal.

When testing without CSI function, the bug was not found.

Because all the system is hung, don't have any method to debug.

[question]

How to debug and how to resolve the problem?

Thanks.

Best regards,

Linghua

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5 Replies
idata
Employee
407 Views

Hi lilinghua,

 

 

You are using a small embedded device; it will be necessary to confirm with your device manufacturer the compatible operating systems. On embedded devices the manufacturers provide the drivers, the issue with the video software and network might be related to compatibility.

 

 

Now, in regards to log errors, I suggest you to get in touch with your Linux OS support and request the steps necessary to follow in order to get them.

 

 

Ubuntu support:

 

http://www.ubuntu.com/support http://www.ubuntu.com/support

 

 

Regards,

 

Mike C

 

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idata
Employee
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Hi Mike C,

We didn't used an offical linux distribution but built Linux from Yocto-1.5( http://mirrors.kernel.org/yocto/yocto/yocto-1.5/poky-dora-10.0.0.tar.bz2 poky-dora-10.0.0.tar.bz2 ), kernel was replaced by 3.8.0. For drivers, most of them are from Ycoto-1.5, except MIPI CSI driver from Fedora 18, and video driver is Intel_BYT_FC18_CED-LITE32_V36-1-23_RC_2014-09-03_3790.tar from an Intel FE.

Thanks.

Best regards,

lilinghua

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idata
Employee
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Hi lilinghua, I suggest you to get in touch with our 01.0rg Open Source community support, they might be able to give you a workaround.

 

 

01.Intel Open Source

 

https://01.org/ https://01.org/

 

Mike C

 

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idata
Employee
407 Views

Ok.

Thank you!

Best regards,

lilinghua

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idata
Employee
407 Views

Hi lilinghua,

 

 

You are welcome.

 

 

Mike C

 

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