Duall display(LVDS +VGA ) problem

[billchen]

My board is  imx6dl sabresd board,  I tried a lot to make LVDS + WVGA  dual diaplay successful, but I failed ,

Is there anyone can give me some advice?

[billchen]

the VGA of my board is from DISP0(RGB24 interface), I had already successfully used VGA as single display screen with

uboot bootargs : console=ttymxc0,115200 init=/init video=mxcfb0:dev=lcd,1280x720M@60,if=RGB24,bpp=32,

and I also had had HDMI  +LVDS by using uboot bootargs :console=ttymxc0,115200 init=/init rw video=mxcfb0:dev=ldb,1024x600M@60 video=mxcfb1:dev=hdmi,1920x1080M@60 video=mxcfb2:off fbmem=10M,28M vmalloc=512M fb0base=0x27b00000

but when I wanted to uboot bootargs as :console=ttymxc0,115200 init=/init rw video=mxcfb0:dev=ldb,1024x600M@60 video=mxcfb1:dev=lcd,1280x720M@60,if=RGB24,bpp=32  , I failed to get LVDS + VGA dual display.

[admin]

Hi Bill,

Please refer to these posts for input on dual displays in Android - https://community.freescale.com/search.jspa?q=*dual+display*+*android*.  Feel free to respond if these references do not help solve your issue.

[billchen]

Dear Grant:

     WE HAVE been successful in dual-display with lvds + VGA  on android 4.0.4 ,  now, we updated to android 4.4.2 , then I

found  we can not be successful in  the lvds + VGA dual display  issue .  And we found the dual dispaly setting already was removed , but we used this to achieve our LVDS + VGA dual-dispaly.  So how can we deal with this problem on android 4.4.2 ,

this is urgent , I hope you can help us

[billchen]

Hi, Grant:

   Thanks for your reply, althrough I've solved it, maybe I can find more by searching this .

                                                   Bill