topic Re: /dev/fb0 problem in i.MX Processors

/dev/fb0 problem

carmilili — Wed, 16 Apr 2014 07:37:31 GMT

Hello

My board is IMX6Q-SDB. When I test the node of /dev/fb0,the video output by HDMI.I find a black point on the left of the screen.You can use the demo of mxc_fb_test.out to see it.

How can I solve it？

Thank you.

Re: /dev/fb0 problem

justin_jiang — Thu, 24 Apr 2014 06:34:39 GMT

Which release are you using? Can you change another HDMI display to test?

Re: /dev/fb0 problem

carmilili — Thu, 24 Apr 2014 06:43:42 GMT

LTIB:3.0.35_4.0_130816

I find it is the cursor.

Re: /dev/fb0 problem

justin_jiang — Thu, 24 Apr 2014 06:48:15 GMT

OK. Thanks for update. This version should have no problem, I verified it on my side.

Re: /dev/fb0 problem

Yuri — Thu, 24 Apr 2014 07:44:28 GMT

As for cursor, You may try the following to stop blinking cursor:

# echo 0 > /sys/class/graphics/fbcon/cursor_blink

or in order to hide cursor:

# echo -e '\033[?17;0;0c' > /dev/tty1 (from serial console)

# echo -e '\033[?17;0;0c' (from framebuffer console)

Have a great day,
Yuri

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Re: /dev/fb0 problem

carmilili — Thu, 24 Apr 2014 07:57:45 GMT

Now ,I through modify the kernel file of fbcon.c to stop blinking cursor .