X11 help please
rgl normally works under Xvfb on Linux: we've been using that for the testing 'for ever'. However R should not 'crash' on an error in a package, and the X11 device has error handlers set up by XSetErrorHandler(R_X11Err); XSetIOErrorHandler(R_X11IOErr); I don't see anything comparable in rgl. The error seems to be in the attributes, so I would have a closer look at those. In particular, how are you running Xvfb?: you may need something like Xvfb :5 -screen 0 1280x1024x24 & setenv DISPLAY :5 to ensure that you have a reasonable visual and hence colormap. (On my system the default is 12 bit.)
On Sun, 17 Jun 2007, Duncan Murdoch wrote:
The rgl package currently crashes R when running under Xvfb (the "virtual frame buffer" server), at least on MacOSX. It makes sense that it shouldn't be able to work there (it needs interactivity), but I don't know how to detect the problems before they cause the crash. Currently the error happens the first time you try to open an rgl window; when rgl calls XCreateWindow R crashes with the error message X Error of failed request: BadMatch (invalid parameter attributes) Major opcode of failed request: 1 (X_CreateWindow) Serial number of failed request: 28 Current serial number in output stream: 29 I've checked and as far as I can see all the parameters we're sending to XCreateWindow are valid, but I might have missed something: I don't know much about X11 programming. (The call is ::Window xwindow = XCreateWindow( xdisplay, RootWindow(xdisplay, DefaultScreen(xdisplay)), 0, 0, 256, 256, 0, xvisualinfo->depth, InputOutput, xvisualinfo->visual, valuemask, &attrib ); but without context that's probably not worth much to others.) Are there any experienced X11 programmers out there who can suggest what to do next? Duncan Murdoch
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