Which system do you use? Android, Ubuntu, OOWOW or others?
Android
Which version of system do you use? Khadas official images, self built images, or others?
Khadas official Android 11 image
Please describe your issue below:
I am trying to make a VIM1S board work with a 8:3 1920x720 display I have. The display model is HSD103KPW2. When I connect it to the board it works and displays the image in fullscreen but it seems to think the native resolution of the display is 1920x1080 (wrong). As a result, everything is skewed and appears wider than it should be.
I already tried changing the resolution via ADB, but without success. If I set 1920x720, additional black borders appear on top and bottom. Also, I don’t see 1920x720 as an option in Khadas settings > Display, just others such as 1080p and 720p.
I saw in other posts that there is a workaround to build my own Android source, but sadly I’m on macOS and it doesn’t seem to be supported as of 2021. Is there any way I could make this work properly? Or maybe some update in the future will address it?
I really didn’t think this was going to be a problem, and I really need this display and to be running Android for my use case. Help will be greatly appreciated!
@dimitarstanev Hello, I checked that the resolution of 1920x720 is not added in our firmware source code, we can add a new 1920x720HDMI resolution, but there are no display parameters for this resolution, so we need the EDID information of the display
Please use the adb command to get the EDID information and send it to us
adb shell
cat /sys/class/amhdmitx/amhdmitx0/rawedid
Refer to the picture below
Or do you have the manual document of the monitor, you can also share it to me to see if there is any relevant information displayed
Hi @xiong.zhang, thanks for the help!
Here’s the EDID of the display:
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
Hello, according to the EDID you sent, the analysis result is as follows, and there is no information about the resolution of the monitor supporting 1920x720.
edid-decode (hex):
00 ff ff ff ff ff ff 00 49 f7 00 00 00 00 00 00
19 1a 01 03 80 00 00 00 0a d7 a5 a2 59 4a 96 24
14 50 54 af ce 00 d1 c0 b3 00 81 00 81 80 81 40
81 c0 01 01 01 01 d1 c0 b3 00 81 00 81 80 81 40
81 c0 01 01 01 01 66 21 50 b0 51 00 1b 30 40 70
36 00 3f 43 21 00 00 1e 00 00 00 fd 00 32 4c 1e
50 10 00 0a 20 20 20 20 20 20 00 00 00 fc 00 41
41 41 0a 20 20 20 20 20 20 20 20 20 01 00 01 45
23 74 4f 10 9f 14 05 04 13 12 16 11 15 03 07 02
06 01 23 09 0f 03 83 01 00 00 66 03 0c 00 10 00
80 01 1d 00 bc 52 d0 1e 20 b8 28 55 40 c4 8e 21
00 00 1e 01 1d 80 d0 72 1c 16 20 10 2c 25 80 c4
8e 21 00 00 9e 8c 0a d0 8a 20 e0 2d 10 10 3e 96
00 13 8e 21 00 00 18 8c 0a d0 90 20 40 31 20 0c
40 55 00 13 8e 21 00 00 18 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 9d 00 05
----------------
Block 0, Base EDID:
EDID Structure Version & Revision: 1.3
Vendor & Product Identification:
Manufacturer: ROW
Model: 0
Made in: week 25 of 2016
Basic Display Parameters & Features:
Digital display
Image size is variable
Gamma: 1.00
RGB color display
First detailed timing is the preferred timing
Color Characteristics:
Red : 0.6357, 0.3486
Green: 0.2900, 0.5888
Blue : 0.1425, 0.0800
White: 0.3134, 0.3291
Established Timings I & II:
IBM : 720x400 70.082 Hz 9:5 31.467 kHz 28.320 MHz
DMT 0x04: 640x480 59.940 Hz 4:3 31.469 kHz 25.175 MHz
DMT 0x05: 640x480 72.809 Hz 4:3 37.861 kHz 31.500 MHz
DMT 0x06: 640x480 75.000 Hz 4:3 37.500 kHz 31.500 MHz
DMT 0x08: 800x600 56.250 Hz 4:3 35.156 kHz 36.000 MHz
DMT 0x09: 800x600 60.317 Hz 4:3 37.879 kHz 40.000 MHz
DMT 0x0a: 800x600 72.188 Hz 4:3 48.077 kHz 50.000 MHz
DMT 0x0b: 800x600 75.000 Hz 4:3 46.875 kHz 49.500 MHz
DMT 0x10: 1024x768 60.004 Hz 4:3 48.363 kHz 65.000 MHz
DMT 0x11: 1024x768 70.069 Hz 4:3 56.476 kHz 75.000 MHz
DMT 0x12: 1024x768 75.029 Hz 4:3 60.023 kHz 78.750 MHz
Standard Timings:
DMT 0x52: 1920x1080 60.000 Hz 16:9 67.500 kHz 148.500 MHz
DMT 0x3a: 1680x1050 59.954 Hz 16:10 65.290 kHz 146.250 MHz
DMT 0x1c: 1280x800 59.810 Hz 16:10 49.702 kHz 83.500 MHz
DMT 0x23: 1280x1024 60.020 Hz 5:4 63.981 kHz 108.000 MHz
DMT 0x20: 1280x960 60.000 Hz 4:3 60.000 kHz 108.000 MHz
DMT 0x55: 1280x720 60.000 Hz 16:9 45.000 kHz 74.250 MHz
Detailed Timing Descriptors:
DTD 1: 2227x2048 91.316 Hz 2227:2048 198.796 kHz 493.610 MHz (analog composite, sync-on-green, interleaved right even, 1 mm x 257 mm)
Hfront 897 Hsync 64 Hback -705 Hpol N Hborder 1
Vfront 8 Vsync 1 Vback 120 Vpol N Vborder 102
DTD 2: 337x1840 75.185 Hz 337:1840 143.153 kHz 451.360 MHz (analog composite, sync-on-green, 33 mm x 0 mm)
Hfront 310 Hsync 0 Hback 2506 Hpol N Hborder 30
Vfront 3 Vsync 63 Vback -2 Vpol N
50 b0 51 00 1b 30 40 70 36 00 3f 43 21 00 00 1e 00 00 'P.Q..0@p6.?C!.....'
DTD 3: 1024x286 426.825 Hz 512:143 156.218 kHz 647.680 MHz (analog composite, sync-on-green, 544 mm x 32 mm)
Hfront 0 Hsync 522 Hback 2600 Hpol N Hborder 32
Vfront 2 Vsync 0 Vback 78 Vpol N
00 fd 00 32 4c 1e 50 10 00 0a 20 20 20 20 20 20 00 00 '...2L.P... ..'
DTD 4: 1024x577 817.109 Hz 1024:577 479.643 kHz 645.120 MHz (analog composite, sync-on-green, 544 mm x 32 mm)
Hfront 32 Hsync 544 Hback -255 Hpol N Hborder 32
Vfront 2 Vsync 0 Vback 8 Vpol N Vborder 1
00 fc 00 41 41 41 0a 20 20 20 20 20 20 20 20 20 01 00 '...AAA. ..'
Extension blocks: 1
Checksum: 0x45
----------------
Block 1, Unknown EDID Extension Block 0x23:
23 74 4f 10 9f 14 05 04 13 12 16 11 15 03 07 02 '#tO.............'
06 01 23 09 0f 03 83 01 00 00 66 03 0c 00 10 00 '..#.......f.....'
80 01 1d 00 bc 52 d0 1e 20 b8 28 55 40 c4 8e 21 '.....R.. .(U@..!'
00 00 1e 01 1d 80 d0 72 1c 16 20 10 2c 25 80 c4 '.......r.. .,%..'
8e 21 00 00 9e 8c 0a d0 8a 20 e0 2d 10 10 3e 96 '.!....... .-..>.'
00 13 8e 21 00 00 18 8c 0a d0 90 20 40 31 20 0c '...!....... @1 .'
40 55 00 13 8e 21 00 00 18 00 00 00 00 00 00 00 '@U...!..........'
00 00 00 00 00 00 00 00 00 00 00 00 00 9d 00 05 '................'
Checksum: 0x05
According to what you described, you can take a picture of abnormal display to see
So it would look like the display was maybe adapted from a 1080p and does not report its own native resolution as supported? Bummer… Or it could be from the driver board itself, since the display only has a LVDS and one other ribbon interface.
Here’s how it looks like (you can clearly see the skewing effect in the image):
In this way, you use adb to modify the resolution of the UI to see the above effect
adb shell
wm szie 1920x720
Yes, I’ve already tried that and also all sorts of resolution changer apps (root and non-root). The result is this:
Or do you have other devices or computers that can display on this monitor?
Yes, I managed to make it work on a PC running Windows (NVidia graphics) with a “custom resolution” in the NVIDIA control panel.
I suppose these generic displays are not very high quality and this is the reason the native resolution is not reported in the EDID. I will be returning the display as it clearly does not work properly.
Anyway, thank you very much for the help and stay safe!
You are here to buy this, so do you want to ask the seller about the specifications of this monitor or specific monitor information?
