Gui updating framebuffer
Some fb drivers may transfer data across and SPI bus, etc.You can open '/dev/fb0', mmap the file and run a standard memory benchmarking algorithm against that memory.Regards, Siva set Text("updated"); and the text was not 'updated' previous and the widget and all parents have called show(), then it will draw to the frame buffer.After that, the frame buffer memory refreshes the screen. This might make sense to avoid flicker if you are drawing a complicated scene.
I have also managed to develop quite a few applications.30fps with the 'demo/embedded/raycasting' example in the Qt directory. I have also managed to develop quite a few applications.You should also try this demo and see if it gets better frame rates. On my Gumstix Overo (OMAP3530) at 500m Hz I get 4fps at 1024x768, 10fps at 640x480 and 30fps only at much smaller resolution. Now the thing I don't know is how Qt writes to the frame buffer.Just the same way gdm is started instead of showing a console login prompt.Bonus question: What would happen if said application crashed? Edit: I have been reading up on runlevels and startup.
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you probably need to define a TTY (probably export TTY=/dev/tty1) so the app knows where it should connect (as inittab and rc script run without any TTY defined).