disable tty output on the screen #29

the project is reaching a point at which debugging output from the tty is no longer needed. it overwrites UI on the screen and only confuses users, seen as a bug or something broken.

done in the /boot/cmdline.txt, in the image by changing console and vt.global_cursor_default params. so, the cmdline file content is now as follows:

root=/dev/mmcblk0p2 rw rootwait console=ttyAMA0,115200 
kgdboc=ttyAMA0,115200 console=tty6 smsc95xx.turbo_mode=N dwc_otg.lpm_enable=0
loglevel=4 elevator=noop vt.global_cursor_default=0

while here, the contents of /boot/config.txt are:

disable_splash=1
dtparam=audio=off
gpu_mem=128
framebuffer_depth=32
framebuffer_ignore_alpha=1
dtoverlay=vc4-fkms-v3d

done in the `/boot/cmdline.txt`, in the image by changing `console` and `vt.global_cursor_default` params. so, the cmdline file content is now as follows: ``` root=/dev/mmcblk0p2 rw rootwait console=ttyAMA0,115200 kgdboc=ttyAMA0,115200 console=tty6 smsc95xx.turbo_mode=N dwc_otg.lpm_enable=0 loglevel=4 elevator=noop vt.global_cursor_default=0 ``` while here, the contents of `/boot/config.txt` are: ``` disable_splash=1 dtparam=audio=off gpu_mem=128 framebuffer_depth=32 framebuffer_ignore_alpha=1 dtoverlay=vc4-fkms-v3d ```

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disable tty output on the screen #29