Dear all,

I got a message from a user of an application developed with lazarus and using the TOpenGLContext.
The user is running my app using cygwin-x from Windows 7 on a CentOS 6.7 computer, the user uses XWin Server for displaying GUI remotely. The application runs fine locally on the remote CentOS computer but using cygwin-x the application does not run with the following messages:

libGL error: No matching fbConfigs or visuals found libGL error: failed to load driver: swrast

Gdk-ERROR **: The program 'myappguiname' received an X Window System error. This probably reflects a bug in the program.
The error was 'BadValue (integer parameter out of range for operation)'. (Details: serial 1656 error_code 2 request_code 149 minor_code 24)

   (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.)
aborting...
Aborted (core dumped)

Any hint on how to solve the problem?

Thank you,
Andrea

Who is forwarding what where? I'm not familiar with cygwin-x.

maj=149 is GLX, min=25 is X_GLXCreateNewContext.

libGL error: No matching fbConfigs or visuals found libGL error: failed to load driver: swrast

That sounds like there is no GL driver present wherever rendering happens. What does glxinfo say?

Does it work with Xming?

Regards,
Martok

Il 25/08/2016 12:52, Martok ha scritto:

Who is forwarding what where? I'm not familiar with cygwin-x. maj=149 is GLX, min=25 is X_GLXCreateNewContext.

What "maj=149 is GLX, min=25 is X_GLXCreateNewContext" means?

I cannot test my application directly, since this issue happens on a user that wrote me. I will ask them to try with Xming too.

What "maj=149 is GLX, min=25 is X_GLXCreateNewContext" means?

That's the magic unexplained numbers in your X error message. They're a bit of a hassle to look up unless you alread have the correct glproto.h. Mistyped 24 as 25, sorry.

I cannot test my application directly, since this issue happens on a user that wrote me. I will ask them to try with Xming too.

Ah, then you're at the same point I was when I learned to hate GLX :D

Just found this one, maybe it helps?
<http://askubuntu.com/questions/541343/problems-with-libgl-fbconfigs-swrast-through-each-update>

Regards,
Martok