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I want to flag the following problems I have met with X11R7.4 and the application ROOT [1].
To reproduce them, you should not need to rebuild ROOT under X11R7.4 but it is sufficient to install pre-built binaries, even if they result from a build under the previous X11R6.99: the 'effects' are the same.
wget ftp://root.cern.ch/root/root_v5.21.04.win32gcc-gcc-3.4.tar.gz tar -xzf root_v5.21.04.win32gcc-gcc-3.4.tar.gz -C /usr/local/
export ROOTSYS=/usr/local/root export PATH="${PATH}:/usr/local/root/bin" export LD_LIBRARY_PATH="${LD_LIBRARY_PATH}:/usr/local/root/lib"
(for example with a startxwin-2.bat which differs from the default only by '+bs')
It enables the 'backingstore' which enable the 're-display' when two X windows are overlapped (otherwise they appear corrupted).
$ root [...]
root [0] .x hsimple.C --------------------------------------
At ROOT prompt (root [0]), you have to type '.x hsimple.C', which means "run (.x) the macro hsimple.C"; hsimple.C is a block of C/C++ code which ROOT executes as an interpreter.
Well, after this, not only ROOT segfaults, but also the X server segfaults!
(for example with the default startxwin.bat), the above example and others work fine, but...
Many ROOT tutorials/examples are OpenGL applications, for example 'geom/shapes.C'. In this case, only ROOT segfaults as follows:
$ root [...]
root [0] .x ./geom/shapes.C root [1] Error in <RootX11ErrorHandler>: BadMatch (invalid parameter attributes) (XID: 14680185, XREQ: 62) assertion "!c->xlib.lock" failed: file "/usr/src/ports/xorg/libxcb/libxcb-1.1-2/src/libxcb-1.1/src/xcb_xlib.c", line 73 ------------------------------------
Cheers, Angelo.
--- [1] http://root.cern.ch
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