1.3.2a client freeze server crash

1.3.2a client freeze server crash

Postby burzek » 2021-04-21 12:44

Hi Rudi,

Still on many pc , I am still experiencing vnc viewer freeze/disconnect on first connection to the uvnc server.
The winvnc crashes and spawns again , causing vnc viewer to disconnect .
Even the latest version 1.3.2a did not solve this problem.
Sometime it happens some time it does not.
Is it possible to create a special version to collect information and send you so that you can find what is happening?

Best Regards,
Burzek
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Re: 1.3.2a client freeze server crash

Postby Rudi De Vos » 2021-04-21 18:09

Special build with minidump
https://www.uvnc.eu/download/133/crashrpt_133.zip
Image

If mail fail, you can export it as zip and manual send it.
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Re: 1.3.2a client freeze server crash

Postby burzek » 2021-04-26 15:35

Hi,

I sent you some reports. First ones are because of viewer settings was ZRLE with 8 colors. It kept crashing the server.
last 2 reports should be because of clipbard problem.

I will load it to more pc to report other crash types.

Thanks,
Burzek
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Re: 1.3.2a client freeze server crash

Postby Rudi De Vos » 2021-04-26 20:26

debug seems to indicate an error in the intsruction set sse3 used by the zlib compression library.
(Used by many encoders and the clipboard)

What cpu are you testing on ?

Checking the compiler options for this library.
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Re: 1.3.2a client freeze server crash

Postby burzek » 2021-04-28 15:16

Hi Rudi,

The uvnc 1.2.2.4 64 bit works without any problems.

The cpu is AMD Athlon II X2 240 processor.
Here is the cpu-z screenshot.

Image
burzek
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Re: 1.3.2a client freeze server crash

Postby Rudi De Vos » 2021-04-28 18:29

Code: Select all
The uvnc 1.2.2.4 64 bit works without any problems.

That version had an older Zlib library.
It looks like the new zlib ( chromium version) could be the cause.

we gonna build the winvnc.exe with zlib 1.2.11, special test build.
But you need to test it, we just can't repeat the crash.
The info in the crash is limited, we just see the assembler call in zlib, but not sure is this is the real cause.
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Re: 1.3.2a client freeze server crash

Postby burzek » 2021-04-29 15:05

Hi Rudi,

I see, I can test it when you make the new test file.
I am willing to help.

Also vncviewer stays in memory after crashes or disconnects. Sometimes I see 3-4 vncviewer just sitting in memory.
Is it possible to find the cause also?

Thanks,
Burzek
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Re: 1.3.2a client freeze server crash

Postby Rudi De Vos » 2021-04-29 18:05

https://www.uvnc.eu/download/133/crashrpt_133_2.zip

New test, please pm the ultravnc.ini on crash( remove ip / passwd)
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Re: 1.3.2a client freeze server crash

Postby burzek » 2021-05-06 16:29

Hi Rudi,

Sorry for late reply.
I have great news, it worked.
No more crashes when clipboard copying.
I will keep the crash test exe running so if there is any more other types of crashes you will receive them.

Thanks for your great help.
Burzek
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Re: 1.3.2a client freeze server crash

Postby Rudi De Vos » 2021-05-06 17:31

Great, i will commit the code.

Code: Select all
zlib/adler32.c
addler32_simd_ need to be disabled
Never expected that the chromium zlib had this bug
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