Hello Erik, Thanks for that transfer. > > Thanks for making the Console/Graphic console thing clear. > > Indeed my plan is to get an understanding about the Linux Display driver > > Architecture. > > > > I am just aware of framebuffer driver architecture. > > Sorry, I made a mistake. I know that Xserver is user land app Just look at below. > > X server -- user level -------- > > Fbcon -- kernel level > > Fbdev > > Fbcon-* > > > > I think this is the way the display driver works. > > The kernel does not use an X server. The X server has nothing to do > with the frame buffer drivers, except that X could use the frame buffer > as its display. You could also use gtk-fb or Qt-fb to display a GUI. Yes, X server uses the framebuffer driver supplied buffer. I just weanne to know, is there another way that a GUI application can work without using Framebuufer driver & probably through some other display driver. I just have this in mind because; assume that I have an i810 chipset grph card. The Xserver also provides a driver (i810_drv.o) for that which is not framebuffer driver. Probably, this is what is in use on my system just because I have no access to /dev/fb0 & on accessing it says NO such device. Also, how could the Xserver dynamically change the interfaces like sometimes accessing /dev/fb0 or /dev/xxx? Is the i810_drv.o a monolithic driver? > > If I want to write/modify the driver to rotate the screen by 90 degrees, > > at which level/files I need to do the modifications in the above shown > > files. > > No need for that, X already supports that through the RANDR extention. > It was developed to allow on-the-fly rotating of screen contents on > hand-held devices, but it can be used on desktops as well. > > Is it available in XFree86 version 4.3.0 release? Can u please forward me a document or links of that kind that could narrate me how I use Xserver to rotate the screen. > Erik > > -- > Erik Mouw > J.A.K.Mouw@xxxxxxxxxxxxxx mouw@xxxxxxxxxxxx Thanks for the support. Regards, Mukund jampala -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/
