Resolved! Buster 3 beta 3,5 inch touchscreen problem, error

michel8166 · May 19, 2021, 5:11pm

top right and bottom left are exactly as soon as you hit them, top left and bottom right are rotated or swapped180 degrees

gvolt · May 19, 2021, 5:19pm

Just to clarify:

Top left touch appears: bottom right?

Bottom right appears: top left?

michel8166 · May 19, 2021, 5:21pm

exactly.

gvolt · May 19, 2021, 5:39pm

What happens if you rename “/etc/X11/xorg.conf.d/99-calibration.conf” to “/etc/X11/xorg.conf.d/99-calibration.conf.bak”?

Another thing came to mind:
Change “99-calibration.conf” to

Section "InputClass"
        Identifier      "calibration"
        MatchProduct    "ADS7846 Touchscreen"
        Option "Calibration" "268 3880 227 3936"
        Option  "SwapAxes"      "0"
        Driver "evdev"
EndSection

and set the rotation from the Touch Display plugin’s config page to 270 degrees.

michel8166 · May 19, 2021, 6:22pm

changed the name to “99-calibration.conf.bak” and remove: rotate = 90 from the boot.conf.txt, original line “dtoverlay=tft35a:rotate=90”

see video how it is now.

gvolt · May 19, 2021, 7:02pm

Thanks for the video
For comparison try now the “99-calibration.conf” from post #24 please.

michel8166 · May 19, 2021, 7:18pm

[quote=“gvolt, post:26, topic:47527”]
For comparison try now the “99-calibration.conf” from post #24 please.
[/quote

stays the same.

these are my settings now.

270 degrees in the plugin.

 GNU nano 3.2                    /boot/config.txt                              

initramfs volumio.initrd
gpu_mem=32
max_usb_current=1
dtparam=audio=on
audio_pwm_mode=2
dtparam=i2c_arm=on
disable_splash=1
hdmi_force_hotplug=1
dtoverlay=tft35a

include userconfig.txt

 GNU nano 3.2      /etc/X11/xorg.conf.d/99-calibration.conf.bak                

Section "InputClass"
        Identifier      "calibration"
        MatchProduct    "ADS7846 Touchscreen"
        Option  "Calibration"   "268 3880 227 3936"
        Option  "SwapAxes"      "0"
        Driver "evdev"
EndSection

gvolt · May 19, 2021, 7:37pm

Ok, then test

Section "InputClass"
        Identifier      "calibration"
        MatchProduct    "ADS7846 Touchscreen"
        Option  "Calibration"   "3880 268 227 3936"
        Option  "SwapAxes"      "0"
        Driver "evdev"
EndSection

michel8166 · May 19, 2021, 7:59pm

now adjusted.

when I click top right the cursor appears at the top left, when click at the top left the cursor appears at the top right, this is the same for bottom, left click cursor appears at the bottom right, click at the bottom right, the cursor appears at the bottom left.

gvolt · May 19, 2021, 8:23pm

This makes me think that the X-axis is inverted. So probably (hopefully ) “99-calibration.conf” has to look like this:

Section "InputClass"
        Identifier      "calibration"
        MatchProduct    "ADS7846 Touchscreen"
        Option  "Calibration"   "268 3880 227 3936"
        Option  "SwapAxes"      "0"
        Option  "InvertX"       "1"
        Driver "evdev"
EndSection

michel8166 · May 19, 2021, 8:55pm

I made a mistake , I accidentally changed the line /etc/X11/xorg.conf.d/99-calibration.conf to /etc/X11/xorg.conf.d/99-calibration.conf.bak

I put this back to original and now the touchscreen works fine

so left the line Option “InvertX” “1” out

the settings are now like this.

270 degrees in the touch plugin.

  GNU nano 3.2        /etc/X11/xorg.conf.d/99-calibration.conf                  

Section "InputClass"
        Identifier      "calibration"
        MatchProduct    "ADS7846 Touchscreen"
        Option  "Calibration"   "3880 268 227 3936"
        Option  "SwapAxes"      "0"
        Driver "evdev"
EndSection

and boot.config.txt

  GNU nano 3.2                    /boot/config.txt                              

initramfs volumio.initrd
gpu_mem=32
max_usb_current=1
dtparam=audio=on
audio_pwm_mode=2
dtparam=i2c_arm=on
disable_splash=1
hdmi_force_hotplug=1
dtoverlay=tft35a

include userconfig.txt

gvolt · May 19, 2021, 9:00pm

So, problem solved?

michel8166 · May 19, 2021, 9:02pm

yes, problem solved.
may I thank you very much for the help, without you I would not have succeeded.
thanks again

TruongVu · May 17, 2022, 11:30am

I had the problem that the screen was jittery, shaky, and the colors were very pale.

whywontthiswork · May 22, 2022, 11:27pm

how were you even able to get the screen to work?? I’ve tried EVERYTHING and it doesn’t work. Please help.

gvolt · May 23, 2022, 6:33am

What is the brand and exact model name of your screen?

What Volumio version are you running and on which device?

whywontthiswork · May 23, 2022, 8:54pm

The brand is a generic chinese brand. attached is a picture of the PCB.

the volumio version i tried to use was v3.251 on a raspberry pi 3 b+. I followed the google doc that you provided on another post here (3.5_inch_Volumio.pdf - Google Drive) and during the SSH I got multiple errors that read “unable to resolve host: volumio”. after following the doc exactly my volumio was basically bricked and only showed a black screen with no connectivity (the screen was all white before and all of my plugins worked).
edit: apparently new users cannot upload images. the PCB reads “3.5 inch Display-F
480 x 320 Pixel
SPI 180MHz Support
XPT2046 Touch Controller”
thanks

whywontthiswork · May 23, 2022, 8:55pm

my spotify plugin also doesn’t work but this seems to be an ongoing issue for everyone

gvolt · May 23, 2022, 9:16pm

I did NOT create this doc and never recommended to follow it

Does it really read “3.5 inch Display-F” and what’s the brand?

Once I know more specifically what screen you have, we can do a step by step installation based on a fresh Volumio system.

P.S. Are you able to PM me a picture of the PCB?

gvolt · May 23, 2022, 9:17pm

Sorry, I don’t use spotify so can’t help.