why an HDMI -> DVI adapter doesn't work ?

matteobp

Now I have my Orange Pi Plus connected using a HDMI -> VGA adapter, but with a resolution of 1280 x 720, that is a 16:9. My monitor is an old standard 4:3 monitor, with a maximum resolution of 1280x1024. Is there a way to have a 4:3 resolution on Orange Pi Plus?

Thanks

magicse

matteobp replied at 2015-8-5 17:47
Now I have my Orange Pi Plus connected using a HDMI -> VGA adapter, but with a resolution of 1280 x  ...

• screen0_output_mode: Output mode for screen0:
• screen1_output_mode: Output mode for screen1:

• mode	used for tv/hdmi output	used for vga output
  0	480i	1680*1050
  1	576i	1440*900
  2	480p	1360*768
  3	576p	1280*1024
  4	720p50	1024*768
  5	720p60	800*600
  6	1080i50	640*480
  7	1080i60
  8	1080p24
  9	1080p50
  10	1080p60	1920*1080
  11	pal	1280*720
  14	ntsc

  
  

matteobp

Now I'm using the "script.bin.OPI-PLUS_720p" prepared by loboris, and it is set to mode 4, but the current resolution isn't "1024*768".
Moreover, the Orange Pi Plus doesn't have a vga connector, but only the hdmi connector.

magicse

matteobp replied at 2015-8-6 14:17
Now I'm using the "script.bin.OPI-PLUS_720p" prepared by loboris, and it is set to mode 4, but the c ...

because resolution 1280 1024 in mode 4 only for VGA bu not HDMI (((

magicse

matteobp replied at 2015-8-6 14:17
Now I'm using the "script.bin.OPI-PLUS_720p" prepared by loboris, and it is set to mode 4, but the c ...

Try mode 3 it more close to 4:3

matteobp

I tried with mode 3 and mode 5.
mode 3: 688*556 @50Hz
mode 5: 1280*720 @60Hz

Riconec

Have the same problems. Monitor detects signal but shows black screen. I`m trying different adapters, today I had found working HDMI-DVI adapter (works well on my laptop).

Changing script.bin/fex didn`t helped, but I also have problems with OS, maybe when I`ll fix those  it would be simplier to figure out cause of HDMI problems. (just begin studing linux and embedded).

marekwolek

Hi
I have same problem witch HDMI-DVI .  After modification [script.bin] the resolution of screen changed.

dni

Hi,

the only solution for now is to set script.bin to following:

1. [disp_init]
   
2. disp_init_enable = 1
   
3. disp_mode = 0
   
4. <b>screen0_output_type = 3</b>
   
5. <b>screen0_output_mode = 5</b>
   
6. screen1_output_type = 3
   
7. screen1_output_mode = 5
   
8. <b>fb0_scaler_mode_enable = 1</b>
   
9. fb0_format = 0
   
10. <b>fb0_width = 1280</b>
    
11. <b>fb0_height = 1024</b>
    
12. fb1_format = 0
    
13. fb1_width = 0
    
14. fb1_height = 0
    
15. sunxi_fb_mem_reserve = 32
    
16. 
    
17. [hdmi_para]
    
18. hdmi_used = 1
    
19. hdmi_power = "vcc-hdmi-18"
    
20. hdmi_cts_compatibility = 1

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This works for me, but the quality is not the best...

Im working to patch the kernel like the user zibob mentioned here http://www.orangepi.org/orangepi ... 4743&fromuid=190030, but untill now i cant get it to work...

tokka

Hi guys, have you tried with an hdmi->dvi cable? (without adapter)
I'm using it with op a20 (not the plus) and it works. Have you checked if there some incompatibility between the cable and the adapter? Both signals are digital, so they "sould" work without issues.

This is my script.bin

1. [mali_para]
   
2. mali_used = 1
   
3. mali_clkdiv = 3
   
4. 
   
5. [disp_init]
   
6. disp_init_enable = 1
   
7. disp_mode = 0
   
8. screen0_output_type = 3
   
9. screen0_output_mode = 5
   
10. screen1_output_type = 2
    
11. screen1_output_mode = 11
    
12. fb0_framebuffer_num = 6
    
13. fb0_format = 10
    
14. fb0_pixel_sequence = 0
    
15. fb0_scaler_mode_enable = 1
    
16. fb1_framebuffer_num = 6
    
17. fb1_format = 10
    
18. fb1_pixel_sequence = 0
    
19. fb1_scaler_mode_enable = 1
    
20. lcd0_backlight = 197
    
21. lcd1_backlight = 197
    
22. lcd0_bright = 50
    
23. lcd0_contrast = 50
    
24. lcd0_saturation = 57
    
25. lcd0_hue = 50
    
26. lcd1_bright = 50
    
27. lcd1_contrast = 50
    
28. lcd1_saturation = 57
    
29. lcd1_hue = 50

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