I built armbian from the main branch for my tablet based on Allwinner A33 and the topic: 

 

Used q88_a33_tablet_1024x600_defconfig and tried q8_a33_tablet_1024x600_defconfig

 

the image was built successfully, at startup I see the console of u-boot, and can use it bu OTG, but only before message the kernel starting... and then after kernel starting it will a black screen as i think the video mode or something else is configured incorrectly, I checked the boot kernel logs, the kernel starts successfully, there are no any errors during start, apparently the problem is only in the video output on my tablet.

I ask for help, help me understand what the problem is and figure it out, this is very important to me

 

P.S.  Author from topic above, say that need to set , because boot screen will be black, but this case is not helped for me:

echo blacklist pwm_bl>/etc/modprobe.d/pwm.conf

P.S.S Also, i tried to built Armbian 23.02, the same as code in main branch

Edited May 13, 20233 yr by ToShuk

To discussion:

I found this https://docs.armbian.com/Hardware_Allwinner/#how-to-reconfigure-video-output

Can it help me to fix my issue ? after changing boot.cmd need to compile it ? 

Added this:

setenv video-mode sunxi:1024x600-24@60,monitor=lcd
 

setenv load_addr "0x45000000"
setenv overlay_error "false"
# default values
setenv verbosity "7"
setenv console "both"
setenv disp_mem_reserves "off"
setenv disp_mode "1024x600p60"
setenv rootfstype "ext4"
setenv docker_optimizations "on"
setenv bootlogo "false"
setenv devnum "0"
setenv rootdev "/dev/mmcblk${devnum}p1"
setenv earlycon "off"
setenv video-mode sunxi:1024x600-24@60,monitor=lcd

 

to boot.cmd , compiled boot.scr but nothing

 

Any ideas?

armbian-ramlog.log boot.log

kern.log armbian-hardware-monitor.log syslog user.log

Edited May 14, 20233 yr by ToShuk

can it be an issue with dtb file?