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Screen resolution not supported with newer kernel?


lolitodubateau
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I have a Rock Pi4 B (rk3399) and I do not find the solution to use my native screen resolution with the latest kernel: 1600x1200.

 

It was working fine with Armbian Bionic Legacy kernel 4.4. However, despite my tinkering, I do not find how to make it work with the latest kernel (option is not available in the Display Setting, xrandr manipulation did not give any success).

 

Any pointer towards a solution would be greatly appreciated.

 

Below the output of xrandr for the two images I ran.

 

Welcome to Armbian Bionic with Linux 4.4.198-rockchip64

Screen 0: minimum 320 x 200, current 1600 x 1200, maximum 8192 x 8192
HDMI-1 connected primary 1600x1200+0+0 (normal left inverted right x axis y axis) 531mm x 398mm
   1600x1200     60.00*+
   1920x1080     60.00    50.00    59.94
   1920x1080i    60.00    50.00    59.94
   1280x1024     60.02
   1440x900      74.98    59.90
   1280x960      60.00
   1280x720      60.00    50.00    59.94
   1440x576      50.00
   1024x768      75.03    70.07    60.00
   1440x480      60.00    59.94
   800x600       75.00    60.32    56.25
   720x576       50.00
   720x576i      50.00
   720x480       60.00    59.94
   720x480i      60.00    59.94
   640x480       75.00    60.00    59.94
   720x400       70.08
Welcome to Armbian Bionic with Linux 5.4.22-rockchip64

Screen 0: minimum 320 x 200, current 1280 x 1024, maximum 4096 x 4096
HDMI-1 connected primary 1280x1024+0+0 (normal left inverted right x axis y axis) 531mm x 398mm
   1920x1080     60.00    50.00
   1920x1080i    60.00    50.00
   1280x1024     60.02*
   1280x960      60.00
   1280x720      60.00    50.00
   1440x576      50.00
   1024x768      60.00
   1440x480      59.94
   800x600       60.32    56.25
   720x576       50.00
   720x480       59.94

 

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Armbian is a community driven open source project. Do you like to contribute your code?

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I've run into bugs in console mode... refuses to output anything other than 1920x1080, including on hardware which maxes out at 720p.

 

Sadly I've never figured out the correct incantations to pass to the kernel in the bootEnv (?) to force it to a resolution... everything I've tried just causes it to freeze completely during boot.

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