James Andrewartha a ?crit : > You're hitting the limit of your graphics card's memory - see > http://gentoo-wiki.com/HOWTO_nVidia_GL_Desktop_Effects#Black_Window_Bug for > more details and a workaround.
Thanks for the pointer! There's more to it than black windows, though: I tried at home on an Geforce FX5700 with 256 MB RAM with a 1600x1200 desktop. More memory, so I could start more gnome-term windows, maybe 30. Then a first black window appeared, and on the next try, X crashed. Laurent
