I got messages from Waveshare:
Rain (Waveshare)
Dec 7, 2023, 18:50 GMT+8
Hello
…
I will test the Volumio system for you
Best regards
Rain
Raspi ??
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yes, RaspiOS 32-bit
Prepared, running, Works the same like on RaspiOS 64bit :
Dispolay but not rotate.
EDIT:
I changed orientation used mouse and select Screen Configuration from the Preferences menu. Right-click on the HDMI-A-1 display rectangle in the layout editor, select Orientation
My observation is that the screen can’t be rotated after applied this:
dtoverlay=vc4-kms-v3d-pi5
that’s why, of course thanks to @gvolt I use this command:
xrandr --output HDMI-1 --rotate right
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My observation is that my 11.9 not start 
well, my screen looks very similar to your. And it started to work.
My best guess it is because of PEBKAC 
ofc it is a joke
I don’t need this command on Raspi. Mr. Rain from Waveshare wrote me that in Pi5 I should rotate with Screen Config.
He still monitoring situation.
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It may be truth, but for now my Wavashare 7.9" works becuase of this.
edit:
When I activated it, my screen started to live - I could see booting message /disturbed but it was first live symptome/ and finally login screen to volumio - in wrong rotation.
Problem was the Touch Display coudn’t start due to Error connecting to Xserver.
Above error has been fixed by @gvolt by creating missing: 99-vc4.conf file
My is blank at start
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Maybe you had some ideas overnight, in your sleep ??
Maybe I prepare second one set Pi5/Waveshare 11.9" and send to one of you ??
EDIT: It’s not a joke.
Now I have problem but I think that maybe near future somebody else want change Pi to newer in system with 11.9"
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Hi sent mi userconfig.txt:
"# Add your custom config.txt options to this file, which will be preserved during updates
dtoverlay=vc4-kms-v3d
max_framebuffer_height=1480
hdmi_group=2
hdmi_mode=87
hdmi_timings=320 0 80 16 32 1480 0 16 4 12 0 0 0 60 0 42000000 3
"
but still the same. If I use command: dtoverlay=vc4-kms-v3d screen powered off backlight.
What the …
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what port are you using? HDMI0 or HDMI1?
the same like on photo above from Waveshare. HDMI near USB PowerSupply
To sum up:
RaspiOs 32 at first start:
RaspiOs 32 after config in Screen Configuration
I don’t need to change any command in config.txt.
After changed SD Card to Volumio:
nothing.
If I started Volumio in original config backlight is still on. If I only add “dtoverlay=vc4-kms-v3d” or “dtoverlay=vc4-kms-v3d-pi5” I have backlight on after start and backlight off and " no HDMI signal" LED.
I tried :
dtoverlay=vc4-kms-v3d-pi5
disable_fw_kms_setup=1
max_framebuffer_height=1480
hdmi_group=2
hdmi_mode=87
hdmi_timings=320 0 80 16 32 1480 0 16 4 12 0 0 0 60 0 42000000 3
and
dtoverlay=vc4-kms-v3d
disable_fw_kms_setup=1
max_framebuffer_height=1480
hdmi_group=2
hdmi_mode=87
hdmi_timings=320 0 80 16 32 1480 0 16 4 12 0 0 0 60 0 42000000 3
and
dtoverlay=vc4-kms-v3d-pi5
max_framebuffer_height=1480
hdmi_group=2
hdmi_mode=87
hdmi_timings=320 0 80 16 32 1480 0 16 4 12 0 0 0 60 0 42000000 3
and
dtoverlay=vc4-kms-v3d
max_framebuffer_height=1480
hdmi_group=2
hdmi_mode=87
hdmi_timings=320 0 80 16 32 1480 0 16 4 12 0 0 0 60 0 42000000 3
still nothing.
I edited userconfig via Notepad ++ and via Putty “sudo nano /boot/userconfig.txt”
I upgraded Pi5 firmware to newest.
I checked 6 HDMI cables
I tried with two Pi5
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How did you do that?
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- I put to Pi5 SD card with RaspiOS,
- connect via WinSCP and use Putty,
- run commands:
sudo apt update
sudo apt upgrade
sudo rpi-eeprom-update -a - reboot
My firmware checked via SystemInfo Plugin was:
Firmware Version: 2023/10/30 16:45:10 Copyright (c) - (embedded)
Now is:
Firmware Version: 2023/11/20 19:40:17 Copyright (c) - (embedded)
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OK, you did with RaspiOS
Yes. You told me that with Volumio it destroy system. You are specialist and I listen what you said.
But new firmware nothing change. Raspi works, Volumio not.
I ask Waveshare what they done because I still have no hdmi signal LED.
I use command boost with higher value but without result.
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I enabled TEST MODE and upgrade to 3.584 ( I know, is unstable, unchecked, untested ) and restart system.
and connected to the Waveshare 11.9 witout any change in userconfig and config line and…
JUPI !!!
Now I will try to configure screen after that install TouchDisplay and check LCD
Yes I know 3.584 is unstable version, I will wait for official but with sure that LCD working.
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