Michel , I checked fbset output , its same in both cases and its : mode "240x320-60" # D: 4.608 MHz, H: 19.200 kHz, V: 60.000 Hz geometry 240 320 240 320 32 timings 217013 0 0 0 0 0 0 rgba 8/16,8/8,8/0,8/24 endmode Frame buffer device information: Name : DISP3 FG Address : 0x95000000 Size : 460800 Type : PACKED PIXELS Visual : TRUECOLOR XPanStep : 1 YPanStep : 1 YWrapStep : 0 LineLength : 960 Accelerator : No When I am using X11 on fb0 , fbset -i -fb /dev/fb0 gives me as mode "800x480-59" # D: 30.303 MHz, H: 30.985 kHz, V: 59.018 Hz geometry 800 480 800 480 32 timings 33000 0 50 25 10 128 10 rgba 8/16,8/8,8/0,8/24 endmode Frame buffer device information: Name : DISP3 BG Address : 0xae000000 Size : 33554432 Type : PACKED PIXELS Visual : TRUECOLOR XPanStep : 1 YPanStep : 1 YWrapStep : 0 LineLength : 3200 Accelerator : No Will this information help you to gain some pointers ? Thanks ; Umang Gupta <div class="gmail_quote">2010/12/14 Michel Dänzer <<a href="mailto:michel@daenzer.net">michel@daenzer.net</a>> <blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;"><div class="im">On Die, 2010-12-14 at 12:31 +0530, umang gupta wrote: > > I planned to run my X11 on 2nd framebuffer device /dev/fb1 in place > of fb0 . I have enabled both nodes in kernel and hence I have /dev/fb0 > and /dev/fb1 on board . > I created a conf file 22-xorg-fb1.conf > in /etc/X11/xorg.conf.d/ ..that I am attaching here . > > When I started X by running startx , I get a black screen . . I got > logs as Xfb1.log . > > Now I replace conf file with 22-xorg-fb0.conf that access fb0 .. I got > X11 seen on screen . Logs received as Xfb0.log .. > > Now I kill X , again uses /dev/fb1 , run startx , it brings X11 > up ... > > > I am not getting why , while using fb1 first time , I am getting > black screen ? </div>Is there any difference in Xorg.0.log or the output of fbset -i -fb /dev/fb1 between the unsuccessful and successful attempts, or does something appear in the dmesg output between them? ... -- Earthling Michel Dänzer | <a href="http://www.vmware.com" target="_blank">http://www.vmware.com</a> Libre software enthusiast | Debian, X and DRI developer </blockquote></div>