Hi there!
I installed the 2022 image of Patchbox OS (latest available from Patchbox OS – Raspberry Pi OS for Audio Projects) and I’m a Linux newbie but know some basic scripting and C++. I have a PiSound and rpi 3b+.
I’m trying to get miracast ability working but get this error.
flatpak install flathub org.gnome.NetworkDisplays
Looking for matches…
error: Nothing matches org.gnome.NetworkDisplays in remote flathub
I downloaded the .flatpakref file for NetworkDisplays and tried to install by running it, but it also has an error. I first followed this and rebooted. https://flathub.org/en/setup/Debian
flatpak install org.gnome.NetworkDisplays.flatpakref
error: No such ref 'app/org.gnome.NetworkDisplays/arm/stable' in remote flathub
I also tried to get my USB DisplayLink display working (I have a portable monitor that doesnt have HDMI), but had errors with the public keys being expired in the debian repos. evdi-dkms dependency is an issue.
$ sudo apt update
Get:1 http://ftp.ca.debian.org/debian sid InRelease [193 kB]
Hit:2 http://archive.raspberrypi.org/debian bullseye InRelease
Get:3 http://raspbian.raspberrypi.org/raspbian bullseye InRelease [15.0 kB]
Get:4 http://raspbian.raspberrypi.org/raspbian bullseye/main armhf Packages [13.2 MB]
Err:1 http://ftp.ca.debian.org/debian sid InRelease
The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 6ED0E7B82643E131 NO_PUBKEY 78DBA3BC47EF2265
Hit:5 http://apt.blokas.io rpi InRelease
Reading package lists... Done
W: GPG error: http://ftp.ca.debian.org/debian sid InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 6ED0E7B82643E131 NO_PUBKEY 78DBA3BC47EF2265
E: The repository 'http://ftp.ca.debian.org/debian sid InRelease' is not signed.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.
And with just evdi-dkms
sudo apt install evdi-dkms
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
The following NEW packages will be installed:
evdi-dkms
0 upgraded, 1 newly installed, 0 to remove and 423 not upgraded.
Need to get 0 B/28.9 kB of archives.
After this operation, 160 kB of additional disk space will be used.
Selecting previously unselected package evdi-dkms.
(Reading database ... 163389 files and directories currently installed.)
Preparing to unpack .../evdi-dkms_1.9.0+dfsg-1_all.deb ...
Unpacking evdi-dkms (1.9.0+dfsg-1) ...
Setting up evdi-dkms (1.9.0+dfsg-1) ...
Loading new evdi-1.9.0+dfsg DKMS files...
It is likely that 5.15.36-rt41-v7+ belongs to a chroot's host
Building for 5.15.36-rt41+, 5.15.36-rt41-v7+, 5.15.36-rt41-v7l+, 5.15.36-rt41-v8+, 6.1.21+, 6.1.21-v7+ and 6.1.21-v7l+
Module build for kernel 5.15.36-rt41+ was skipped since the
kernel headers for this kernel does not seem to be installed.
Module build for kernel 5.15.36-rt41-v7+ was skipped since the
kernel headers for this kernel does not seem to be installed.
Module build for kernel 5.15.36-rt41-v7l+ was skipped since the
kernel headers for this kernel does not seem to be installed.
Module build for kernel 5.15.36-rt41-v8+ was skipped since the
kernel headers for this kernel does not seem to be installed.
Building initial module for 6.1.21+
Error! Bad return status for module build on kernel: 6.1.21+ (armv7l)
Consult /var/lib/dkms/evdi/1.9.0+dfsg/build/make.log for more information.
dpkg: error processing package evdi-dkms (--configure):
installed evdi-dkms package post-installation script subprocess returned error exit status 10
Errors were encountered while processing:
evdi-dkms
E: Sub-process /usr/bin/dpkg returned an error code (1)
The log shows
DKMS make.log for evdi-1.9.0+dfsg for kernel 6.1.21+ (armv7l)
Sun 30 Aug 18:19:53 BST 2026
make: Entering directory '/usr/src/linux-headers-6.1.21+'
CC [M] /var/lib/dkms/evdi/1.9.0+dfsg/build/evdi_platform_drv.o
CC [M] /var/lib/dkms/evdi/1.9.0+dfsg/build/evdi_platform_dev.o
CC [M] /var/lib/dkms/evdi/1.9.0+dfsg/build/evdi_sysfs.o
CC [M] /var/lib/dkms/evdi/1.9.0+dfsg/build/evdi_modeset.o
In file included from /var/lib/dkms/evdi/1.9.0+dfsg/build/evdi_platform_dev.c:30:
/var/lib/dkms/evdi/1.9.0+dfsg/build/evdi_drm_drv.h:23:10: fatal error: drm/drm_irq.h: No such file or directory
23 | #include <drm/drm_irq.h>
| ^~~~~~~~~~~~~~~
compilation terminated.
make[1]: *** [scripts/Makefile.build:250: /var/lib/dkms/evdi/1.9.0+dfsg/build/evdi_platform_dev.o] Error 1
make[1]: *** Waiting for unfinished jobs....
In file included from /var/lib/dkms/evdi/1.9.0+dfsg/build/evdi_modeset.c:25:
/var/lib/dkms/evdi/1.9.0+dfsg/build/evdi_drm_drv.h:23:10: fatal error: drm/drm_irq.h: No such file or directory
23 | #include <drm/drm_irq.h>
| ^~~~~~~~~~~~~~~
compilation terminated.
make[1]: *** [scripts/Makefile.build:250: /var/lib/dkms/evdi/1.9.0+dfsg/build/evdi_modeset.o] Error 1
make: *** [Makefile:2012: /var/lib/dkms/evdi/1.9.0+dfsg/build] Error 2
make: Leaving directory '/usr/src/linux-headers-6.1.21+'
For now I just bought a cheap capture card, and can use my laptop as a portable HDMI display via capture card / viewing the rpi’s HDMI output as a webcam feed on the laptop.
Would I be better off just trying to use the latest Raspberry Pi OS instead of Patchbox from 2022, for the packages to work? The Patchbox OS config description I dont fully understand but seems to be what I want; realtime kernel, jack audio, configured for audio and midi applications. Are the Patchbox OS settings something I can apply with a few commands in the terminal, or a script, on top of a newer rpiOS image? I saw a lot of notes in the github about building PatchboxOS but I think that’s beyond me right now.
Or perhaps there’s a newer PatchboxOS image somewhere I can download to fix these package issues? I saw reference to a 2024 build? And I see some activity on the pisound github?
Thanks for any help!
Cheers, thanks again for the help!