Changing screen resolution

zeckrich

Hello,

is it possible to change resolution of screen to 1080p?
Maybe before writing the image or even after installation in config.txt of rPi3?

Regards
Patrick

IKS

Yes, it is possible, but I wouldn't recomment you doing this, as it makes RPi3 slow and may introduce crashes. You need to change two files:

1) /boot/config.txt
2) /system/build.prop

In both files, you will find the hardcoded 1280x720 resolution. Just change it to whatever you wish (in this case you also should set persist.rpi.mode.auto to 0).

zeckrich

Hi kalkov,

thanks for your quick response!

Sadly my rPi booted up but with blank screen.
After title "Android" appeared on screen it changed to black :neutral:

I'll try some more settings with refresh rate...
Do you think this misbehaviour is based on wrong settings in config.txt or in build.prop?

IKS

Sure, wrong settings can cause a lot of different issues. Please make sure that your monitor/tv/touchscreen supports the resolution you have set and that values in both files match up.

uberNoobZA

My display is running quite lo res and does not have anything relating to 1280 x 720. Am I correct that I need to set framebuffer_width and height to change resolution ?

IKS

No. It depends on what you really want to achieve. Since the official touchscreen only supports 800x480, emteria.OS adjusts the output automatically. If you would like to enfore a higher resolution (it would mean Android has to recalculate the picture on each change, which might be very expensive in terms of RAM and CPU time), you need to set it in the Android shell. For example, using the ADB shell:

su
wm size 1280x720

Keep in mind following commands:

wm size reset
wm density 160
wm density reset

uberNoobZA

Thanks

Hmeeding

I need to run my rPi3 on a 19" screen with a 5:4 aspect ratio in Portrait mode.

I have played with various settings and none of them seems to work.

1) /boot/config.txt
hdmi_force_hotplug=1
hdmi_drive=2
hdmi_group=2
hdmi_mode=87
hdmi_cvt=1280 1024 60 4 0 0 0
display_rotate=1
disable_overscan=1
kernel=zImage
dtparam=audio=on
dtparam=i2c1=on
dtparam=i2c_arm=on
dtoverlay=vc4-kms-v3d,cma-256
initramfs ramdisk.img 0x01f00000
mask_gpu_interrupt0=0x400
avoid_warnings=2
enable_uart=1
start_x=1

2) /system/build.prop
debug.drm.mode.auto=1
debug.drm.mode.force=1280x1024
ro.hdmi.device_type=4
ro.opengles.version=131072
ro.radio.noril=1
ro.rfkilldisabled=1
ro.sf.lcd_density=213
wifi.interface=wlan0

Changes explained:
hdmi_cvt=1280 1024 60 4 0 0 0

desired resolution is 1280x1024
Frames per second is 60
Aspect ratio is 4, which translates to 5:4

display_rotate=1
This is to flip the screen by 90 degrees

I am experiencing the following issues:

The screen doesn't flip - it is still in landscape mode
I get an error "SlimLauncher has stopped" and then just a black screen.

Please advise how to best resolve the two issues listed above.

Thanks

IKS

Don't use "display_rotate". If you need a rotated screen, use one of the available apps for Android like "RotationControl". We have also replaced the SlimLauncher with the official Google launcher - it will be available in the next release (1-2 days). Maybe it will fix your problems.

oelly

Hallo, ich habe über das command die Bildschirm Auflösung auf 1280x1024 geändert. Jetzt habe ich ein 4:3 ich habe aber ein Bildschirm der 4:5 bzw. 16:9. Wie ist der command dafür das zu ändern. Ich bekomme es nicht hin die config.txt zu editieren. LG

oelly

Hello, I changed over the command the screen resolution to 1280x1024. Now I have a 4: 3 but I have a screen of 4: 5 or 16: 9. How is the command for that to change. I can not get it to edit the config.txt. LG

Jolle

How do I access the /boot/config.txt and /system/build.prop?

IKS

For example you can mount your sdcard on a Linux PC.

Jolle

I don´t have Linux Pc and in windows I can´t access the sd card after installing android via emteria installing software.

IKS

There is currently no other way of changing the initial resolution.

webhopper

The OpenROV Trident Cockpit app is streaming RAW h264 1280x720 video at 30 fps using RTI DDS. The Cockpit instrument data is displayed fine, but not the video. Other Android devices using the app display the video fine.

1) Would changing the 60 fps to 30 fps in /boot/config.txt be expected to make a difference?
2) The video is displayed in a smaller window, not full screen, so could there be some video scaling issue?
3) Or could some support for RTI DDS be missing in emteria.OS?

I don't have the Trident to test with yet and the person who was testing the app on emteria.OS can't edit the config.txt.

IKS

Please see the system logs for errors, since I am very bad at guessing why it isn't working.

1) No. Unless it is a memory issue and you reduce the resolution.
2) Depends on the application.
3) Idk, what kind of support is required?

What is the problem with editing the config file?

swats

Hi. can not adjust screen 800 * 480
on HDMI on the monitor it turned out,
but on the screen in the car, through the HDMI adapter in the RCA screen does not show anything.
On the TV set, the HDMI screen is black.
here written by https://help.emteria.com/kb/devices-rpi-3
it is necessary to replace debug.drm.mode.auto = 1 on 0
but the config does not have debug.drm
help please make a config for 800 * 480 and if possible which is better through the RCA output
Thank you.

IKS

Which version do you use? In the latest version there is an option in Settings -> Raspberry Pi to request a different resolution without modifying any files.

SurprysE

@IKS , it seems my same problem... The resolution apparently changes even if the dots for pixels remain the same. Except for the boot, that one perfectly follows what is proposed by the config file.
Unfortunately the video because of the commitments I could not do it.
I look if I can tonight.
I am sorry.