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/sys folder empty after deploying the image on the SD card

Question asked by lordtheo on Feb 3, 2017
Latest reply on Feb 22, 2017 by Victor Linnik

Hi Everyone

Please Help!!!

I am using imx6ulevk for my embedded application.

After I deployed the whole image on the sd card with the following command

$ sudo dd if=build/tmp/deploy/images/imx6ulevk/fsl-image-qt5-imx6ulevk.sdcard of=/dev/<sdcard dev>

 i figured out that my /sys folder inside the SD is empty. Nothing inside, 0 bytes.

I can boot the Linux on imx6ulevk board but I cannot  stop the LCD for turning blank after 5min

because "$ echo 0 > /sys/class/graphics/fb0/blank" and others similar commands will not work since /sys folder is empty.

when " $ du -hs /sys" returns 0 bytes and " $ vi  sys/class/graphics/fb0/blank" returns "cannot read the file"

I tried everything below to disable the blanking  but without succes:

echo -e '\033[9]' > /dev/tty0

echo -e '\033[9;0]' > /dev/tty1

echo 0 > /sys/class/graphics/fb0/blank

echo 0 > /sys/class/graphics/fb1/blank

passing consoleblank=0 to bootargs

modifying drivers/tty/vt/vt.c with static int blankinterval = 0;

Disabling CONFIG_VT_CONSOLE

setterm -blank 0

 

Any help will be welcome.

 

Best Regards,

--

Theo.

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