On Wednesday 22 November 2006 02:37, Reuben Martin wrote: > I've a similar Athlon/nvidia setup. If I use OpenGL as root with -f 0 > then all is well. If I use the -f 0 as a normal user my CPU goes to > 100%. Huh... This is weird. Does vsync work for other programs? try this as a normal user: __GL_SYNC_TO_VBLANK=1 glxgears -printfps It should print exactly the vertical refresh rate of your monitor. If it doesn't, there's probably something wrong with your driver setup. > Just using -g by itself doesn't cause the CPU to race, but it > can easily lock things up. (The keyboard locks up, the display > freezes, but the mouse still works) SDL mode is more stable and > doesn't seem to use the CPU any more than the OpenGL mode. I don't mean to shift the blame on others ;) But this sounds a lot like a buggy driver. I too have seen one or two complete lockups while resizing the jack_oscrolloscope window. I guess that's what you get for using a binary driver on a -rt kernel it wasn't made for... Dominic