# X Window System error

**URL:** <https://www.ruby-forum.com/t/x-window-system-error/241469>\
**Category:** GNU Radio\
**Created:** [April 8, 2015, 5:06pm UTC](https://www.ruby-forum.com/t/x-window-system-error/241469 "2015-04-08T17:06:13Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![musicdenotation](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/m/ea666f/32.png) [@musicdenotation](https://www.ruby-forum.com/u/musicdenotation)\
**Post date:** [April 8, 2015, 5:06pm UTC](https://www.ruby-forum.com/t/x-window-system-error/241469/1 "2015-04-08T17:06:13Z")

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Dear Sir,

I’ve just install gnuradio using pybombs, and manually install the  
missing  
python-opengl using apt-get.  
Unfortunately below error occurs when I execute a flowgraph.

Executing:  
“/home/sgku/Dropbox/gnuradio/gr-activecat/examples/jitter/top\_block.py”  
Using Volk machine: avx\_64\_mmx  
The program ‘python2’ received an X Window System error.  
This probably reflects a bug in the program.  
The error was ‘BadMatch (invalid parameter attributes)’.  
(Details: serial 2351 error\_code 8 request\_code 70 minor\_code 0)  
(Note to programmers: normally, X errors are reported  
asynchronously;  
that is, you will receive the error a while after causing it.  
To debug your program, run it with the --sync command line  
option to change this behavior. You can then get a meaningful  
backtrace from your debugger if you break on the gdk\_x\_error()  
function.)

Please advise if you have a quick fix to this.  
My system and version info is available at [1].  
Thank you very much.

[1]. [https://github.com/activecat/gnuradio/blob/master/system\_info.txt](https://github.com/activecat/gnuradio/blob/master/system_info.txt)

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<div class="post-metadata">

**Author:** ![activecat\_k](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/a/c57346/32.png) [@activecat\_k](https://www.ruby-forum.com/u/activecat_k)\
**Post date:** [April 10, 2015, 1:12am UTC](https://www.ruby-forum.com/t/x-window-system-error/241469/2 "2015-04-10T01:12:57Z")

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The kernel log is uploaded to  
[https://github.com/activecat/gnuradio/blob/master/kern.log](https://github.com/activecat/gnuradio/blob/master/kern.log)

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<div class="post-metadata">

**Author:** ![activecat\_k](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/a/c57346/32.png) [@activecat\_k](https://www.ruby-forum.com/u/activecat_k)\
**Post date:** [April 10, 2015, 1:23am UTC](https://www.ruby-forum.com/t/x-window-system-error/241469/3 "2015-04-10T01:23:21Z")

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The error gone when opengl is disabled as suggested in [1].  
But why my PC couldn’t run opengl?

[1]. [http://gnuradio.4.n7.nabble.com/Gnu-companion-td41742.html](http://gnuradio.4.n7.nabble.com/Gnu-companion-td41742.html)