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linuxcnc: default GDK_GL to software-draw-surface #4777

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linuxcnc: default GDK_GL to software-draw-surface #4777

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7 changes: 7 additions & 0 deletions scripts/linuxcnc.in
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Expand Up @@ -33,6 +33,13 @@ if [[ ! -v LINUXCNC_OPENGL_PLATFORM || "${LINUXCNC_OPENGL_PLATFORM}" == "glx" ]]
export QT_QPA_PLATFORM="xcb"
fi

# Once a window holds a Gtk.GLArea (the GTK preview), GTK on X11 draws the
# rest of the window through GL and hands it the other widgets' pixmaps
# with texture-from-pixmap. On some Mesa setups that reads them before
# they are finished, so labels and text glitch all over the window
# (issue #4754). Upload them with a plain copy instead.
export GDK_GL="${GDK_GL:-software-draw-surface}"

# An OpenMP build of OpenBLAS reserves about 1 GiB per CPU when numpy
# is imported; with less RAM than that the kernel refuses to fork the
# GUI (ENOMEM). Nothing here needs threaded BLAS.
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