I.MX6 IPU blanking display smear issue

[zc_tee]

Dear all,

I am currently using a i.mx6 Dual board on my task.

However when i do blanking: echo 1 > /sys/class/graphic/fb0/blank

the lvds display becomes smear, instead of turn blank (full black).

Is there anyway i can make the screen blank (full black), instead of the smearing when do blanking?

Thank you.

Regards,

ZC

[joanxie]

this command works for my board, did  you use dual display or just lvds?

if you use echo "0"  to fb0, any issue?

[zc_tee]

Hi Guanqiong Xie,

echo "0" will return the display to normal mode, is ok.

we are using dual display. both LVDS output at 800x600 resolution.

Regards,

Tee

[joanxie]

lvds is for fb0 or fb2? could you send the uboot command to me?

[zc_tee]

Hi Guanqiong Xie,

LVDS is for both fb0 and fb2.

We did not set it in uboot command. instead we hardcode it in the kernel source code.

Display is ok cause we always can see both display show correctly, besides this blanking issue.

Regards,

Tee