hdmi 1024x600 @ 24 RGB

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hdmi 1024x600 @ 24 RGB

Postby apuokas » Mon Dec 15, 2014 8:15 am

hallo,
i used latest android 4.4.2 image from wandboard.org site. On my wandboard quad c1 i used hdmi output to conect with 7" 1024x600x24RGB touch display. But android always automaticly selecting 1024x768 resolution. So i cant see whole desktop picture. How to make android supporting 1024x600x24RGB resolution? Or is there a posibility to adjust screen with android os. please, help.
regards
apuokas
 
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Re: hdmi 1024x600 @ 24 RGB

Postby Richard » Tue Dec 16, 2014 4:00 am

Hello, apuokas:

1024x600 is not a standard CEA HDMI resolution, and so isn't supported by default.
Code: Select all
root@wandboard:/ # cat /sys/class/graphics/fb0/modes
S:1920x1080p-30
S:720x480p-60
S:720x576p-50
S:1280x720p-50
S:1920x1080p-50
S:1280x720p-60
S:1920x1080p-60
V:640x480p-60
D:1280x720p-60
D:1920x1080p-60
V:640x480p-60

If you want to have 1024x600 output for HDMI.
You need to tweak kernel.
I never try this before.
I find a reference from freescale forum:
https://community.freescale.com/thread/306901
If this works, there will be a new item for 1024x600 under "/sys/class/graphics/fb0/modes".
Then, modify the uEnv.txt under /boot in first partition to change hdmi resolution to 1024x600.
Code: Select all
video_mode=display0=dev=hdmi0,mode=1024x600@60,if=RGB24,bpp=32



BR,

Richard
Richard
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Re: hdmi 1024x600 @ 24 RGB

Postby apuokas » Wed Dec 17, 2014 9:50 pm

thank you for replay. it seems i need some more knowledge about displays to do that. i hope ill have time till next weekend to make some experiments :) it would be nice if it works.
bg
apuokas
apuokas
 
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Re: hdmi 1024x600 @ 24 RGB

Postby apuokas » Sun Jan 04, 2015 8:29 pm

Richard,
i followed you link and read this topic. but i didnt understud what exactly i must do to tweak kernel. i found something about modelines and my modeline there: http://linuxhelp.150m.com/resources/modelines.htm but what should i do with it- i dont know. can you help me further?
bg
apuokas
 
Posts: 8
Joined: Mon Dec 15, 2014 7:57 am

Re: hdmi 1024x600 @ 24 RGB

Postby apuokas » Tue Jan 13, 2015 5:21 pm

i have this touch display (7" 1024x600@60 - 55 EUR) working on wandboard quad c1. i compiled newest kernel and installed ubuntu 14.04 folowing description on eewiki. After i installed xubuntu-desktop and it instaled xorg automaticly. After i changed resolution adding modeline with xrandr. This modeline i get thru cvt command. I have touch funktion configured using ubuntu own calibrator. But how i can get right resolution/modeline on android- i can not find till now.
apuokas
 
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Re: hdmi 1024x600 @ 24 RGB

Postby ustbzm » Thu May 12, 2016 2:57 pm

I also have this display(1024x600@60). I can not change the resolution to 1024x600 in ubuntu 12.04. Could yo send me your ubuntu image? Thaks.
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