Works in console, stops working in desktop env

[addohm]

PLEASE NOTE

⚠️ GitHub issues are for reporting problems with the software, tech support do not monitor these.
Our software team are smol and busy, and you will not receive a timely response.
If you're having a hardware issue with your Hyperpixel 4, you should contact support@pimoroni.com.

⚠️ Hyperpixel 4 is only officially supported on Raspberry Pi OS. There are too many operating systems with too many quirks to begin to support them all. Issues relating to other operating systems will be closed.

Describe the bug

The display works perfect until I set the pi to start into desktop. I can see it goes through the boot sequence but once it startx it goes black (but still backlit). I've skinned this cat 9 different ways and every variation produces the same results. Console good, X bad.

To Reproduce

sudo apt update
sudo apt upgrade
sudo apt dist-upgrade
sudo apt clean
sudo reboot
sudo /home/addohm/scripts/install-desktop
sudo reboot
git clone https://github.com/pimoroni/hyperpixel4 -b pi4
cd hyperpixel4
sudo ./install.sh
edit /boot/config.txt - dtoverlay=vc4-fkms-v3d
sudo reboot
(Display works at this point)
sudo raspi-config - boot to desktop
(Display stops working once boot reaches startx)

Your HyperPixel 4

Let us know which HyperPixel 4 board you're using. Note: if you're having a problem with the original HyperPixel you should go to: https://github.com/pimoroni/hyperpixel

1. Is it Square or Rectangular?
2. Touch or non Touch?
3. Approximately when was it purchased
   Last week
4. How is it connected to your Pi
   Directly using the riser header

Your Raspberry Pi

Give as much detail about your Pi and OS as possible. We only officially support Raspbian, but might be able to point you in the right direction if the problem is with another OS.

1. What model of Raspberry Pi are you using (the result of cat /proc/cpuinfo | grep Revision can tell us this exactly
   Revision : b03115

2. Which OS release are you using: lsb_release --description and uname -r
   Description: Raspbian GNU/Linux 11 (bullseye)

3. Is this a fresh OS setup, or one you might have previously installed scripts/add-ons on?
   "Other specific purpose OS" > Octopi

Extra debugging information

If you're having a problem with touch, try checking dmesg for related errors:

• dmesg | grep Goodix for HyperPixel 4.0" Rectangular*
  [ 7.119080] Goodix-TS 22-0014: supply AVDD28 not found, using dummy regulator
  [ 7.119487] Goodix-TS 22-0014: supply VDDIO not found, using dummy regulator
  [ 7.126802] Goodix-TS 22-0014: Error reading 1 bytes from 0x8140: -6
  [ 7.154612] Goodix-TS 22-0014: Error reading 1 bytes from 0x8140: -6
  [ 7.181055] Goodix-TS 22-0014: I2C communication failure: -6
• dmesg | grep ft5 for HyperPixel 4.0" Square

And check i2c is working:

ls /dev/i2c-*
/dev/i2c-22

You should see something like:

pi@raspberrypi:~ $ ls /dev/i2c-*
/dev/i2c-7

And your HyperPixel 4 touch is showing up (there should be an address blocked out with UU in the below command):

i2cdetect -y X ( where X is the number of i2c bus found in the command above)

For example:

pi@raspberrypi:~ $ i2cdetect -y 7
     0  1  2  3  4  5  6  7  8  9  a  b  c  d  e  f
00:          -- -- -- -- -- -- -- -- -- -- -- -- --
10: -- -- -- -- UU -- -- -- -- -- -- -- -- -- -- --
20: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
30: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
40: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
50: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
60: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
70: -- -- -- -- -- -- -- --

 0  1  2  3  4  5  6  7  8  9  a  b  c  d  e  f

00: -- -- -- -- -- -- -- --
10: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
20: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
30: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
40: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
50: -- -- -- -- -- -- -- -- -- -- -- -- -- 5d -- --
60: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
70: -- -- -- -- -- -- -- --

[addohm]

Disabled kms and fkms. Problem solved. Is it though?

addohm@pitest:~ $ hyperpixel4-rotate left
HyperPixel 4: Square - Display/Touch Rotation
This rotate utility only works with the Raspberry Pi OS desktop version or X-based alternatives.

Rotation requires hardware support on the Pi 4 or Pi 400
**Ensure "dtoverlay=vc4-fkms-v3d" is enabled in /boot/config.txt**

[Gadgetoid]

I think this is an Octopi issue, since this works on Raspberry Pi OS. At an absolute guess it doesn't do any of the weird monkeying with /usr/share/dispsetup.sh that Pi OS uses to make displays work.

Do you see anything if you cat /usr/share/dispsetup.sh?

What Window manager/desktop environment does sudo /home/addohm/scripts/install-desktop install?

Without kms you're at the behest of whatever window manager you're using to handle rotation in software, effectively, which isn't very desirable.

[addohm]

I think this is an Octopi issue, since this works on Raspberry Pi OS. At an absolute guess it doesn't do any of the weird monkeying with /usr/share/dispsetup.sh that Pi OS uses to make displays work.

Do you see anything if you cat /usr/share/dispsetup.sh?

What Window manager/desktop environment does sudo /home/addohm/scripts/install-desktop install?

Without kms you're at the behest of whatever window manager you're using to handle rotation in software, effectively, which isn't very desirable.

The only way I have been able to get this to work on the pi3a is disabling kms and fkms. I've spent two+ days on this. The pi3b+\pi4 method actually works but I couldn't get the screen to rotate in ratpoison. Tell me what you need and I will supply it. I've got two identical pi3a's with this setup right now that I can play with.

I also discovered that enabling i2c breaks the display the same way. i2c on, blank screen with backlight. i2c off, normal operation.