# Possibly Defective Hyperpixel?

**URL:** <https://forums.pimoroni.com/t/possibly-defective-hyperpixel/19361>\
**Category:** Support\
**Created:** [April 22, 2022, 11:49pm UTC](https://forums.pimoroni.com/t/possibly-defective-hyperpixel/19361 "2022-04-22T23:49:49Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![hack-wizard](https://avatars.discourse-cdn.com/v4/letter/h/ed8c4c/32.png) [@hack-wizard](https://forums.pimoroni.com/u/hack-wizard)\
**Post date:** [April 22, 2022, 11:49pm UTC](https://forums.pimoroni.com/t/possibly-defective-hyperpixel/19361/1 "2022-04-22T23:49:49Z")

</div>

Trying to get this to work with my Pi400. The script gives me a grand total of 0 install options so I had to manually clone the pi4 branch and install and then… well the backlight on my display turns on and the touchscreen works (strangely) but I get no display whatsoever. Am I missing something? Is there some kind of diagnostic I can run to see what the deal is or adjust/confirm the config?

---

<div class="post-metadata">

**Author:** ![hack-wizard](https://avatars.discourse-cdn.com/v4/letter/h/ed8c4c/32.png) [@hack-wizard](https://forums.pimoroni.com/u/hack-wizard)\
**Post date:** [April 23, 2022, 6:18pm UTC](https://forums.pimoroni.com/t/possibly-defective-hyperpixel/19361/2 "2022-04-23T18:18:21Z")

</div>

So I found the solution here, looks like the /boot/config.txt was missing one line:

> <https://github.com/pimoroni/hyperpixel4/issues/177>
>
> Pi 3B and Pi 4 users running the latest and greatest Raspberry Pi OS should fore…go our installer and use the instructions below.
> 
> \> :information\_source: If you're tied to an older OS and you want to install the legacy drivers, use: 
> \> \`curl -sSL get.pimoroni.com/hyperpixel4-legacy | bash\`
> 
> 
> This new OS can currently be found in Raspberry Pi Imager under "Raspberry Pi OS (Other)"
> 
> !\[image\](https://user-images.githubusercontent.com/1746967/162789702-0c95f165-e482-4d47-a179-d841b903985c.png)
> 
> Once installed you need only one line in \`/boot/config.txt\`:
> 
> \* Rectangular: \`dtoverlay=vc4-kms-dpi-hyperpixel4\`
> \* Square: \`dtoverlay=vc4-kms-dpi-hyperpixel4sq\`
> 
> You can rotate these in config.txt by adding the \`rotate=\` parameter, like so:
> 
> \`\`\`
> dtoverlay=vc4-kms-dpi-hyperpixel4sq,rotate=90
> \`\`\`
> 
> This supports rotation in console, too, for all you CyberDeck builders!
> 
> \## HyperPixel 4 Rectangular Rotations
> 
> Ensure rotation is set to "Normal" in "Display Configuration"
> 
> And that the dtoverlay is in \`/boot/config.txt\`:
> 
> \`\`\`
> dtoverlay=vc4-kms-dpi-hyperpixel4
> \`\`\`
> 
> Finally use one of the following \`dtparam\` lines immediately underneath to set the parameters:
> 
> \* The default is portrait with header on the right, no extra line needed
> \* \`dtparam=rotate=90,touchscreen-swapped-x-y,touchscreen-inverted-y\` - Landscape with header on the bottom
> \* \`dtparam=rotate=180\` - Portrait with header on the left
> \* \`dtparam=rotate=270,touchscreen-swapped-x-y,touchscreen-inverted-x\` - Landscape with header on the top
> 
> \## HyperPixel 4 Square Rotations
> 
> HyperPixel 4 Square does not correctly swap or invert touch input, so you may want to use the Xorg config method below.
> 
> Ensure rotation is set to "Normal" in "Display Configuration"
> 
> And that the dtoverlay is in \`/boot/config.txt\`:
> 
> \`\`\`
> dtoverlay=vc4-kms-dpi-hyperpixel4sq
> \`\`\`
> 
> Finally use one of the following \`dtparam\` lines immediately underneath to set the parameters:
> 
> \* Default is header on the top
> \* \`dtparam=rotate=90\` - Header is on the left (wonky touch, see below)
> \* \`dtparam=rotate=180\` - Header \*still\* on the top (doesn't work? Same as default)
> \* \`dtparam=rotate=270\` - Header is on the right (wonky touch, see below)
> 
> :warning: The \`touchscreen-swapped-x-y\` parameter does not seem to work with Square. You may need to use the script below for Raspberry Pi OS with Desktop.
> 
> \## On the fly rotation
> 
> Rotating the display via "Screen Configuration" ("arandr") results in inverted touch input and other weirdness- use the dtoverlay params.
> 
> If you want to rotate on the fly you can use the below bash script to rotate either display and persist settings into Xorg configuration files.
> 
> :warning: Note: You \*must\* remove the \`rotate=\` argument from \`/boot/config.txt\` for these to make sense.
> 
> You can remove the rotation config by deleting the \`/usr/share/X11/xorg.conf.d/88-hyperpixel4-touch.conf\` and \`/usr/share/X11/xorg.conf.d/88-dsi-1-rotate.conf\` files.
> 
> \`\`\`bash
> \#!/bin/bash
> 
> UTILITY="hyperpixel4-rotate (Rectangular)"
> XORG\_TOUCH\_CONF\_FILE="/usr/share/X11/xorg.conf.d/88-hyperpixel4-touch.conf"
> XORG\_CONF\_FILE="/usr/share/X11/xorg.conf.d/88-dsi-1-rotate.conf"
> 
> OVERLAY\_S="vc4-kms-dpi-hyperpixel4sq"
> OVERLAY\_R="vc4-kms-dpi-hyperpixel4"
> 
> function success() {
> echo -e "$(tput setaf 2)$1$(tput sgr0)"
> }
> 
> function inform() {
> echo -e "$(tput setaf 6)$1$(tput sgr0)"
> }
> 
> function warning() {
> echo -e "$(tput setaf 1)$1$(tput sgr0)"
> }
> 
> function set\_xorg\_conf {
> if \["$DISPLAY" == "" \]; then
> inform "No DISPLAY variable set, trying :0.0"
> export DISPLAY=:0.0
> fi
> 
> inform "Rotating display $1";
> xrandr --output DPI-1 --rotate $1
> 
> MATRIX="$2 $3 $4 $5 $6 $7 $8 $9 ${10}"
> 
> inform "Setting libinput Calibration Matrix: 1 0 0 0 1 0";
> xinput set-prop "pointer:$DEVICE" "libinput Calibration Matrix" 1 0 0 0 1 0 0 0 1
> 
> inform "Setting Coordinate Transformation Matrix: $MATRIX";
> xinput set-prop "pointer:$DEVICE" "Coordinate Transformation Matrix" $MATRIX
> 
> inform "Saving xorg touch config to $XORG\_TOUCH\_CONF\_FILE";
> sudo tee $XORG\_TOUCH\_CONF\_FILE \> /dev/null \<\<EOF
> \# Auto generated by $UTILITY, edit with care!
> 
> Section "InputClass"
> Identifier "HyperPixel4 $DEVICE"
> MatchProduct "$DEVICE"
> Option "CalibrationMatrix" "1 0 0 0 1 0 0 0 1"
> Option "TransformationMatrix" "$MATRIX"
> EndSection
> EOF
> 
> inform "Saving xorg rotate config to $XORG\_CONF\_FILE";
> sudo tee $XORG\_CONF\_FILE \> /dev/null \<\<EOF
> \# Auto generated by $UTILITY, edit with care!
> 
> Section "Monitor"
> Identifier "DPI-1"
> Option "Rotate" "$1"
> EndSection
> EOF
> }
> 
> printf "HyperPixel 4: Display & Touch Rotation\\n"
> printf "This utility requires the Raspberry Pi OS desktop or an \*Xorg-based\* alternative.\\n\\n"
> 
> ORIENTATION=$1
> 
> grep -e "^dtoverlay=$OVERLAY\_S.\*" /boot/config.txt \> /dev/null
> if \[$? -ne 0 \]; then
> grep -e "^dtoverlay=$OVERLAY\_R.\*" /boot/config.txt \> /dev/null
> if \[$? -ne 0 \]; then
> warning "Rotation requires hardware support on the Pi 4 or Pi 400"
> warning "Ensure your HyperPixel4 is enabled in /boot/config.txt"
> printf "\\nSquare: dtoverlay=$OVERLAY\_S\\n"
> printf "Rectangular: dtoverlay=$OVERLAY\_R\\n\\n"
> exit 1
> else
> inform "Detected HyperPixel 4 Rectangular (found \\"$OVERLAY\_R\\" in config.txt)"
> DEVICE="Goodix Capacitive TouchScreen"
> fi
> else
> inform "Detected HyperPixel 4 Square (found \\"$OVERLAY\_S\\" in config.txt)"
> DEVICE="EP0110M09"
> fi
> 
> case $ORIENTATION in
> "right")
> set\_xorg\_conf $ORIENTATION 0 1 0 -1 0 1 0 0 1
> ;;
> "left")
> set\_xorg\_conf $ORIENTATION 0 -1 1 1 0 0 0 0 1
> ;;
> "inverted")
> set\_xorg\_conf $ORIENTATION -1 0 1 0 -1 1 0 0 1
> ;;
> "normal")
> set\_xorg\_conf $ORIENTATION 1 0 0 0 1 0 0 0 1
> ;;
> \*)
> printf "Unsupported orientation: $ORIENTATION\\n\\n";
> printf "Usage:\\n"
> printf " $0 \<orientation\>\\n\\n"
> printf "Where orientation is one of: left, right, normal, inverted.\\n"
> exit 1
> esac
> \`\`\`

```auto
dtoverlay=vc4-kms-dpi-hyperpixel4

```