How to show contents of all variables in /sys/class subfolder
grep "" ./* or recursively grep -R "" ./*
How to change resolution permanently ?
In file /etc/rc.local add this line, thight after fist line. echo 60 > /sys/devices/fb.7/graphics/fb0/fps fbset -a -xres 1920 -yres 1080 -vxres 1920 -vyres 1080 -t 6434 168 88 60 4 60 5 -hsync high -vsync high You can use for example Midnight Commander, which can be installed with # apt install mc
How to install QT Creator directly on URVEBoard?
Open Terminal from UBUNTU desktop $ sudo -i # passwd enter root password twice # ifconfig check IP address, use ssh console (Putty for example) and login as root with password provided with passwd command # apt update # apt upgrade # apt-get install software-properties-common # add-apt-repository ppa:ubuntu-sdk-team/ppa confirm question # apt-get update # apt-get [...]
How to add file to android image before build?
In file device/rockchip/rk3288/device.mk look for line with PRODUCT_COPY_FILES += device/rockchip/rk3288/urveboot.sh:system/etc/urveboot.sh and make similar line for new file
How to change framebuffer FPS in android?
# echo 60 > /sys/devices/fb.7/graphics/fb0/fps
How to change HDMI resolution
In the kernel source, we can see: RK3288-Android5.1\kernel\arch\arm\boot\dts\rk3288-tb_8846.dts have include the lcd define: #include "lcd-b101ew05.dtsi" so we change the file: RK3288-Android5.1\kernel\arch\arm\boot\dts\lcd-b101ew05.dtsi hactive = <1280>; vactive = <800>; change these two item for your use resolution,such as: hactive = <1920>; vactive = <1080>; Rebuild the source and burn: resource.img and kernel.img to your board. If you [...]
How to compile kernel
Install the Cross Compile toolchain # mkdir /usr/local/arm # tar xvfj arm-eabi-4.6.tar.bz2 -C /usr/local/arm/ # export ARCH=arm # export CROSS_COMPILE=/usr/local/arm/arm-eabi-4.6/bin/arm-eabi- 4. Compile the Source After you have set the arm-eabi-4.6 compiler effective,then, # tar zxvf RK3288-kernel.tar.gz # cd RK3288-kernel # ./build_default.sh
How to change resolution on HDMI port?
Modify HDMI default resolution only need to modify kernel: RK3288-kernel\drivers\video\rockchip\hdmi\rk_hdmi.h #define HDMI_VIDEO_DEFAULT_MODE HDMI_1280x720p_60Hz //HDMI_1920x1080p_60Hz After the system is powered on echo "1920x1080p-60" > /sys/class/display/HDMI/mode Check current HDMI resolution： cat /sys/class/display/HDMI/mode Check HDMI resolution supported list： cat /sys/class/display/HDMI/modes
Alternative method of hiding navigation bar
Hide command: settings put global policy_control immersive.full=* Show command: settings put global policy_control null
How to shrink VMWARE virtual disk with android source
Empty trash (Ubuntu) rm -rf ~/.local/share/Trash/* Defrag and zero fill /dev/sda1: sudo e4defrag /dev/sda1; cat /dev/zero > zero.fill;sync;sleep 1;sync;rm -f zero.fill On vmware host run vmware_vdiskmanager with -k sda1.vmdk as in this example: "C:\Program Files (x86)\VMware\VMware Workstation"\vmware-vdiskmanager.exe -k URVEBoardSDK.vmdk