[SDL] (openGL repaint) thread problem

Johann Deneux johannd at DoCS.UU.SE
Wed Aug 8 07:37:03 PDT 2001

On Tue, 7 Aug 2001, Johannes Schmidt wrote:

> Hi,
> I have some problems using threads.
> If I try to do some drawing stuff in a thread created with SDL_CreateThread, 
> the application exits with
> Fatal signal: Segmentation Fault (SDL Parachute Deployed)
> Xlib: unexpected async reply (sequence 0x66)!

Your X server does not support multi-threading. You have to do all your
calls to the Xlib from one single thread. I guess you may even have to use
only the main thread.

> If I do the same drawing within the main thread, the application runs
> expexted.

> [...] 

Johann Deneux

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