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tesseract4.0 crash when I use Intel i7-8700K CPU with Ubuntu 18.04

인황
Beginner
2,152 Views

Hi,

I found tesseract4.0 crashed when I use Intel i7-8700 CPU with Ubuntu 18.04.

tesseract4.0 is a OCR open source. ( https://github.com/tesseract-ocr/tesseract GitHub - tesseract-ocr/tesseract: Tesseract Open Source OCR Engine (main repository) )

I used pyocr for wrapping lib for tesseract.

Here is the way I use, http://www.riptutorial.com/python/example/28811/pyocr PyOCR | python Tutorial

When I call below function several times, it is OK.

txt = tool.image_to_string( 

Image.open('test.png'),

 

lang=lang,

 

builder=pyocr.builders.TextBuilder()

 

)

But, when I call it over one hundred times, crash happens and PC is reboot.

By the way,

when I use i5-8400 CPU, sometimes error message is shown, but no crash happens.

And, one more thing,

Tesseract uses AVX and SSE, and when I disable them and re-test it, everything is fine. Never crash happens. No error message is shown.

But, you know, running speed is not good.

I think i7-8700 CPU has something with AVX and SSE function which is different from those of i5-8400.

Is there anybody who has a similar experience to me?

Is there any solution I can use tesseract with i7-8700K CPU turning on AVX and SSE.

2 Replies
idata
Employee
1,175 Views

Hello DrPRO,

 

 

Thank you for joining the Intel Community Support.

 

 

I understand that Tesseract 4.0 crashes in a system built with an Intel® Core™ i7-8700K Processor in Ubuntu 18.04. I would like to provide further recommendations.

 

 

To address this issue correctly, we recommend you to visit these websites as you may need additional documentation to fix this issue.

 

 

https://askubuntu.com/

 

 

https://ubuntuforums.org/

 

 

You can also contact the developers of this open source engine.

 

 

I hope this helps.

 

 

Wanner G.
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Logological
Beginner
950 Views

I am experiencing the same problem; running Tesseract on certain files causes my entire computer (with an Intel Core i7-8700 @ 3.20 GHz) to do a hard reset.  I am running openSUSE Tumbleweed with Linux 6.1.1.  In the Tesseract issue tracker, about six other people have all reported the same issue with various Intel CPUs and GNU/Linux distributions.  It's clear that the problem is not specific to Ubuntu or any one GNU/Linux distribution.  It's also pretty clear that this isn't a bug in Tesseract, since a user-level application should not be able to force a hard reset of the computer (without even going through the OS's shutdown sequence).

I suppose the only possibilities left are a Linux kernel bug or a fault in certain Intel CPUs (or the associated microcode), possibly related to AVX2 and/or power management (since disabling AVX2-specific code in Tesseract works around the issue).  So far I have no evidence that it's a kernel bug; no kernel error messages get output to the console or system log before the hard reset.  Can we escalate this problem to an Intel support engineer?  I can provide step-by-step instructions for triggering the problem.

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