The OP's crash was specific to connecting with the RealVNC Viewer, so
that strongly suggests that there is a bug in the server related to
decoding non-Tight RFB protocol streams.

The "XIO:  fatal IO error 11" message always occurs when the TurboVNC
Server dies unexpectedly or is killed.

Also, please maintain the original thread subject when replying.


On 2/23/17 1:06 PM, Jason Kurtz wrote:
> *[VirtualGL-Users] The OP is having a problem with TurboVNC, not
> VirtualGL. The nVidia driver is not relevant to the problem. Please let
> me handle this. Thanks. On 2/22/17 1:48 PM, Jason Kurtz wrote: > Could
> you also run the following commands on the ubuntu server. > List all
> packages installed on the system. > sudo su - > dpkg
> --admindir=/var/lib/dpkg/ --get-selections > installed.packages > The
> current Kernel Version. > uname -a > installed.kernel > The jre
> installed on the system > The jdk the system is using > java -version 2>
> installed.java > The nvidia driver version loaded in the kernel. > dmesg
> | grep nvidia > installed.nvidia > I had a similar problem and when I
> upgraded to 16.04 lts and the latest > nvidia driver it stopped.
> <https://sourceforge.net/p/virtualgl/mailman/message/35684268/>*
> From: Jason Kurtz <tekcommnv@gm...> - 2017-02-23 14:28:31
> *Attachments:* Message as HTML
> <https://sourceforge.net/p/virtualgl/mailman/attachment/CADO%2BGxwCAOx9JSSURsAMKQt%2B_k-RaEJ%2BTLXj_AxfaCHmAFMmwA%40mail.gmail.com/1/>
> 
>     The OP is having a problem with TurboVNC, not VirtualGL. The nVidia
>     driver is not relevant to the problem. Please let me handle this.
>     Thanks. On 2/22/17 1:48 PM, Jason Kurtz wrote:
> 
> DRC, I was agreeing with you that it is not the nvidia driver and also
> disagreeing with you that it is a problem with Turbovnc.
> 
> This is a known issue affecting a lot of distro's including ubuntu 14.04.
> 
> The bug is in many versions of libxcb and is a 32-bit counter rollover
> problem that has been known for a few years:
> https://bugs.freedesktop.org/show_bug.cgi?id=71338
> 
> Not all versions of libxcb are affected libxcb-1.9-5 has it,
> libxcb-1.5-1 doesn't. From the bug list, 64-bits OS shouldn't be
> affected, but It has also triggered on at least one version.
> 
> It can be verified the following way.
> 
> The following program will crash in less than 15 minutes on affected
> libraries:
> 
> // Compile with: gcc test.c -lX11 && time ./a.out
> #include <X11/Xlib.h>
> void main(void) {
>     Display *d = XOpenDisplay(NULL);
>     if (d)
>      for(;;)
>         XNoOp(d);
> }
> 
> 
> 
> 
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> 
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