Difference between revisions of "ArmbianHowTo"
m (→Changing display output) |
m (→HDMI) |
||
Line 64: | Line 64: | ||
===HDMI=== | ===HDMI=== | ||
+ | ====Set custom resolution==== | ||
+ | |||
+ | To use lower resolution than 1920x1080 append '''/boot/armbianEnv.txt''' with: | ||
+ | extraargs=video=HDMI-A-1:1280x1080 | ||
+ | |||
+ | This will set monitor with 1280x1080 resolution. Getting supported modes is done with: | ||
+ | # cat /sys/class/drm/card0-HDMI-A-1/modes | ||
+ | 1920x1080 | ||
+ | 1920x1080 | ||
+ | 1920x1080 | ||
+ | 1920x1080 | ||
+ | 1920x1080 | ||
+ | 1920x1080 | ||
+ | 1280x1024 | ||
+ | 1280x960 | ||
+ | 1152x864 | ||
+ | 1280x720 | ||
+ | 1280x720 | ||
+ | 1280x720 | ||
+ | 1024x768 | ||
+ | 1024x768 | ||
+ | 1024x768 | ||
+ | 832x624 | ||
+ | 800x600 | ||
+ | 800x600 | ||
+ | 800x600 | ||
+ | 800x600 | ||
+ | 720x576 | ||
+ | 720x480 | ||
+ | 720x480 | ||
+ | 640x480 | ||
+ | 640x480 | ||
+ | 640x480 | ||
+ | 640x480 | ||
+ | 720x400 | ||
+ | |||
+ | ====Disabling HDMI output==== | ||
+ | |||
+ | To disable video output on the HDMI monitor add folloing in '''/boot/armbianEnv.txt''': | ||
+ | extraargs=video=HDMI-A-1:d | ||
+ | |||
+ | Save the file and reboot the board. | ||
==Debugging== | ==Debugging== |
Revision as of 04:20, 31 January 2018
Contents
Changing display output
With current kernel version (4.13) changing display output must be done by recompiling u-boot. This is necessary because kernel supports only SimpleFB. This will change in the future.
LCD
Enable touchscreen
Create blacklist file:
# echo "blacklist sun4i_gpadc_iio" > /etc/modprobe.d/blacklist-touchscreen.conf # echo "blacklist sun4i_gpadc" >> /etc/modprobe.d/blacklist-touchscreen.conf
Calibrate touchscreen
Install calibration package:
# apt-get install xinput-calibrator
After completion start the program inside the X.
Applications -> System -> Calibrate Touchscreen
You will see blank screen. Touch the display at the marks. Then store the calibration values. Create new file 99-calibration.conf
# cat > /etc/X11/xorg.conf.d/99-calibration.conf << __EOF__ Section "InputClass" Identifier "calibration" MatchProduct "1c25000.rtp" Option "Calibration" "3930 108 348 3948" Option "SwapAxes" "0" EndSection __EOF__
Put the values from the calibrator program.
VGA
Changing resolution
The default resolution in 1024x768. You can list all resolutions with:
# xrandr
The output should be something like this:
Screen 0: minimum 320 x 200, current 1280 x 1024, maximum 8192 x 8192 VGA-1 unknown connection 1280x1024+0+0 (normal left inverted right x axis y axis) 0mm x 0mm 1024x768 60.00 + 1920x1200 59.88 59.95 1920x1080 60.00 1600x1200 60.00 1680x1050 59.95 59.88 1400x1050 59.98 59.95 1600x900 60.00 1280x1024 60.02* 1440x900 59.89 59.90 1280x960 60.00 1366x768 59.79 60.00 1360x768 60.02 1280x800 59.81 59.91 1280x768 59.87 59.99 1280x720 60.00 800x600 60.32 56.25 848x480 60.00 640x480 59.94
To change resolution from the command line, do the following:
# export DISPLAY=:0 # xrandr -s <resolution>
HDMI
Set custom resolution
To use lower resolution than 1920x1080 append /boot/armbianEnv.txt with:
extraargs=video=HDMI-A-1:1280x1080
This will set monitor with 1280x1080 resolution. Getting supported modes is done with:
# cat /sys/class/drm/card0-HDMI-A-1/modes 1920x1080 1920x1080 1920x1080 1920x1080 1920x1080 1920x1080 1280x1024 1280x960 1152x864 1280x720 1280x720 1280x720 1024x768 1024x768 1024x768 832x624 800x600 800x600 800x600 800x600 720x576 720x480 720x480 640x480 640x480 640x480 640x480 720x400
Disabling HDMI output
To disable video output on the HDMI monitor add folloing in /boot/armbianEnv.txt:
extraargs=video=HDMI-A-1:d
Save the file and reboot the board.
Debugging
Enabling DRM debug output
The DRM driver supports multiple debugging levels.
Add the following in /boot/armbianEnv.txt:
extraargs=drm.debug=0xf