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ArmbianHowTo2 - Revision history
2026-05-13T20:22:23Z
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StefanM: /* Changing display output */
2018-02-12T09:36:28Z
<p><span dir="auto"><span class="autocomment">Changing display output</span></span></p>
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<td colspan="2" style="background-color: #fff; color: #222; text-align: center;">← Older revision</td>
<td colspan="2" style="background-color: #fff; color: #222; text-align: center;">Revision as of 09:36, 12 February 2018</td>
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<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>Save the file and reboot the board.</div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>Save the file and reboot the board.</div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;"></ins></div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">==Debugging==</ins></div></td></tr>
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<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">===Enabling DRM debug output===</ins></div></td></tr>
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<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">Add the following in '''/boot/armbianEnv.txt''':</ins></div></td></tr>
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StefanM
https://www.olimex.com/wiki/index.php?title=ArmbianHowTo2&diff=3013&oldid=prev
StefanM: Created page with "==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 Simpl..."
2018-02-12T09:35:48Z
<p>Created page with "==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 Simpl..."</p>
<p><b>New page</b></p><div>==Changing display output==<br />
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. <br />
===LCD===<br />
<br />
====Enable touchscreen====<br />
Create blacklist file:<br />
# echo "blacklist sun4i_gpadc_iio" > /etc/modprobe.d/blacklist-touchscreen.conf<br />
# echo "blacklist sun4i_gpadc" >> /etc/modprobe.d/blacklist-touchscreen.conf<br />
<br />
====Calibrate touchscreen====<br />
Install calibration package:<br />
# apt-get install xinput-calibrator<br />
<br />
After completion start the program inside the X.<br />
Applications<br />
-> System<br />
-> Calibrate Touchscreen<br />
<br />
You will see blank screen. Touch the display at the marks. Then store the calibration values.<br />
Create new file '''99-calibration.conf'''<br />
# cat > /etc/X11/xorg.conf.d/99-calibration.conf << __EOF__<br />
Section "InputClass"<br />
Identifier "calibration"<br />
MatchProduct "1c25000.rtp"<br />
Option "Calibration" "3930 108 348 3948"<br />
Option "SwapAxes" "0"<br />
EndSection<br />
__EOF__<br />
<br />
Put the values from the calibrator program.<br />
<br />
===VGA===<br />
<br />
====Changing resolution====<br />
The default resolution in 1024x768. You can list all resolutions with:<br />
# xrandr<br />
<br />
The output should be something like this:<br />
Screen 0: minimum 320 x 200, current 1280 x 1024, maximum 8192 x 8192<br />
VGA-1 unknown connection 1280x1024+0+0 (normal left inverted right x axis y axis) 0mm x 0mm<br />
1024x768 60.00 +<br />
1920x1200 59.88 59.95 <br />
1920x1080 60.00 <br />
1600x1200 60.00 <br />
1680x1050 59.95 59.88 <br />
1400x1050 59.98 59.95 <br />
1600x900 60.00 <br />
1280x1024 60.02* <br />
1440x900 59.89 59.90 <br />
1280x960 60.00 <br />
1366x768 59.79 60.00 <br />
1360x768 60.02 <br />
1280x800 59.81 59.91 <br />
1280x768 59.87 59.99 <br />
1280x720 60.00 <br />
800x600 60.32 56.25 <br />
848x480 60.00 <br />
640x480 59.94 <br />
<br />
To change resolution from the command line, do the following:<br />
# export DISPLAY=:0<br />
# xrandr -s <resolution><br />
<br />
===HDMI===<br />
<br />
====Set custom resolution====<br />
<br />
To use lower resolution than 1920x1080 append '''/boot/armbianEnv.txt''' with:<br />
extraargs=video=HDMI-A-1:1280x1080<br />
<br />
This will set monitor with 1280x1080 resolution. Getting supported modes is done with:<br />
# cat /sys/class/drm/card0-HDMI-A-1/modes <br />
1920x1080<br />
1920x1080<br />
1920x1080<br />
1920x1080<br />
1920x1080<br />
1920x1080<br />
1280x1024<br />
1280x960<br />
1152x864<br />
1280x720<br />
1280x720<br />
1280x720<br />
1024x768<br />
1024x768<br />
1024x768<br />
832x624<br />
800x600<br />
800x600<br />
800x600<br />
800x600<br />
720x576<br />
720x480<br />
720x480<br />
640x480<br />
640x480<br />
640x480<br />
640x480<br />
720x400<br />
<br />
====Disabling HDMI output====<br />
<br />
To disable video output on the HDMI monitor add folloing in '''/boot/armbianEnv.txt''':<br />
extraargs=video=HDMI-A-1:d<br />
<br />
Save the file and reboot the board.</div>
StefanM