how to display lvds + hdmi at the same time on ubuntu ?

[liyu1]

Our customer board(i.MX6Q SDB) have dual channel 1080pLVDS panel + HDMI  port, but same time we could use one port  in linux system only.

os : ubuntu     "L3.0.35_4.1.0_130816_source"

uboot para:

1.

setenv bootargs_mmc 'setenv bootargs ${bootargs} root=/dev/mmcblk0p1 rootwait rw video=mxcfb0:dev=ldb,LDB-1080P60,if=RGB24,bpp=32 ldb=spl0 video=mxcfb1:dev=hdmi,1920x1080M@60,bpp=32 video=mxcfb2:off'

We could get lvds output, but hdmi does't output.

2.

setenv bootargs_mmc 'setenv bootargs ${bootargs} root=/dev/mmcblk0p1 rootwait rw video=mxcfb0:dev=hdmi,1920x1080M@60,bpp=32 video=mxcfb1:dev=ldb,LDB-1080P60,if=RGB24,bpp=32 ldb=spl0 video=mxcfb2:off

We could get hdmi output, lvds does't output.

3.

android JB

we could get two port output at same time.

So, how can i get lvds and hdmi output sametime when i use ubuntu OS?

how set xorg.conf to support LVDS + HDMI at the same time .

I do follow the link below and found that the effect is still the same

i.mx6q Enable Dual Display of Ubuntu

how can i get lvds and hdmi output sametime when i use ubuntu OS?   

[kavitamathur]

Hi,

Did your problem get solved? We are also facing same issue with Linux kernel 3.0.35_4.1.0 and Ubuntu desktop. How did you fix this issue?

Thanks & Regards,

Kavita

[joanxie]

did you try to use the command:

echo "0" > /sys/class/graphics/fb2/blank.

when the board boot up, try to use this command