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I tried using the program glinfo of the glxinfo package. A new window appeared, but only the window-manager decoration parts; the actual content was blank. The mouse and keyboard no longer responded. A few seconds later the screen filled with a repeating wavy grey pattern. I've found no relevant information in any log files. The console-only program glxinfo from the same package works fine.
I'm using Mageia 3, with the following relevant packages:
x11-driver-video-nv-2.1.20-3 (the NVidia driver)
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