Hi Marc. /dev/fb0 and X use the hardware in the same way. It's not that X is using /dev/fb0. Both fb and X normally use MMIO to access the registers on your graphics card directly, and use a plug-in (or 'drivers' for DirectFB) system to do this. DirectFB is using fb however, for basic (non-accelerated) operations such as: open, close, housekeeping, mmap'ing. This also means you shouldn't run directfb-on-fb alongside X (you can of course run DirectFB on top of X).
I don't know what's giving you issues. dfblayer gets it's default info normally from xxxInitLayer(), e.g. in case of a i810 this would be called ovlInitLayer() and result in 640x480 until you change it (via DirectFB). You can always try to see if you can change the layer size with e.g. dfblayer -m 1024x768. hth. Niels marc doz wrote: > I suppose that X use my graphic controller driver and not /dev/fbo > because the graphic card controller is fastest than /dev/fb0, it is > exact ? > I have disabled gdm of my current runlevel. Now i am in text mode > without graphic interface. The resolution is the resolution of the > bootparam vga. > I can use directFB. If i start gdm ... I have again the problem > described in the last mail > I will study directFB and i will search why i can't use directFB and > gdm afterward. > > I have a last question > I suppose that my framebuffer has a resolution of 1280x1024 thanks the > boot param "vga" > > # fbset -s > > mode "1280x1024-77" > # D: 131.096 MHz, H: 80.328 kHz, V: 76.649 Hz > geometry 1280 1024 1280 1024 32 > timings 7628 160 32 16 4 160 4 > rgba 8/16,8/8,8/0,0/0 > endmode > > but when I test : > # sudo dfblayer > > FBDev Primary Layer > > Width 640 > Height 480 > Format RGB32 > Buffermode BACKSYSTEM > > can you explain me why i have this result ? > > best regards > ------------------------------------------------------------------------ > > _______________________________________________ > directfb-users mailing list > directfb-users@directfb.org > http://mail.directfb.org/cgi-bin/mailman/listinfo/directfb-users > -- .------------------------------------------. | DirectFB - Hardware accelerated graphics | | http://www.directfb.org/ | "------------------------------------------" _______________________________________________ directfb-users mailing list directfb-users@directfb.org http://mail.directfb.org/cgi-bin/mailman/listinfo/directfb-users
