Found a way to run Noble PDK

[jacquetc]

Hello,

Here to share a fix which allow me to run the 24.04-1.x PDK image. I'd like if someone can reproduce the fix and confirm ? Thanks

Problem : black QEMU screen, lighdm service not starting . Maybe being on Wayland does something.

1. fixing lightdm:

sudo apt update && sudo apt install libegl-dev libgles-dev

and maybe mesa-utils (not sure if it's needed)

Result : lightdm running, still the black screen

2. Fixing black screen

I had to desactivate the default VGA so Mir would display on the right screen (virtio-gpu-gl-pci)

in images.sh, line 63, modify

QEMU_ARGS="-enable-kvm -device virtio-gpu-gl-pci $QEMU_ARGS"
to
QEMU_ARGS="-enable-kvm -device virtio-gpu-gl-pci -vga none $QEMU_ARGS"

ubuntu-touch-pdk run -r=24.04-1.x -g=sdl (mouse is stuck with the GDK GUI on Wayland)

Host system :

Operating System: TUXEDO OS
KDE Plasma Version: 6.5.2
KDE Frameworks Version: 6.19.0
Qt Version: 6.9.2
Kernel Version: 6.14.0-123037-tuxedo (64-bit)
Graphics Platform: Wayland
Processors: 24 × AMD Ryzen AI 9 HX 370 w/ Radeon 890M
Memory: 32 Gio of RAM (30.5 Gio usable)
Graphics Processor: AMD Radeon Graphics
Manufacturer: TUXEDO
Product Name: TUXEDO InfinityBook Pro AMD Gen10

[emulti]

I can confirm that on Arch Linux with the 24.04-1.x image I also get a black screen by default.

Changing the qemu-system-x86_64 arguments as you describe (adding -vga none) gives a usable display.

With the GTK qemu GUI, the mouse freezes with the onboarding program after clicking 'Next' on the first screen.

Running the image with -gui=sdl allows the Onboarding to be completed. The mouse/trackball speed scaling is very high but with care it is usable.

After completing the Onboarding, the GTK UI works normally with no mouse freezing.

One thing that doesn't work, however, is any of the installed applications. They launch with a title bar and app logo in the window, but after the logo disappears, the app UI window remains blank.

'eglinfo' on the host shows the Graphics subsystem supports EGL v1.5.

When I tried the default 'focal' image, it boots normally with no changes to images.sh. but the behaviour of all the applications is the same- a blank UI area.

[emulti]

In fact it seems the GTK Qemu gui can be used, if the image is rebooted after the mouse freeze in the first screen of the Onboarding application.

On Arch linux, it is necessary to install the egl-x11 and qemu-desktop packages on the host, ensure the user is in the 'kvm' group (and re-login).

• Clone the ubports-pdk repository, change into ubports-pdk directory
• ./ubuntu-touch-pdk -r=24.04-1.x pull
• ./ubuntu-rouch-pdk run
• After boot, mouse freezes on the 'Next' button of first Onboarding screen when clicked
• Login as 'phablet' on console in host, issue 'sudo reboot'
• After reboot, the Onboarding process can be completed

Below issues apply equally whether the GTK or SDL Qemu gui is used.

• Unlike the 20.04 image, any mouse movement in the GUI window gives errors of type:

repowerd: BinderPerformanceBooster: no PowerHAL interface found
repowerd: Can't open /dev/binder: no such file or directory
repowerd: Cant open /dev/hwbinder: no such file or directory

• Even after installing libegl-dev and libgles-dev as suggested in this issue (which also installs libegl1 and libgles1), running any application (for example 'Calculator') produces errors like:

aa-exec: library "libEGL.so" not found
aa-exec: library libGLESv2.so" not found

• There are also many following apparmor errors for the application run denying access to the PCI device 00.04.0, which lspci identifies as the Display controller.
  Other applications (example: "System Settings") give

 library "libcutils.so" not found
failed to load bionic libc.so, falling back own property implementation.

It would seem that the 24.04-1.x/Noble PDK image is not in a good state at present. Can anyone confirm?

[fredldotme]

Thanks for the input, I've taken some steps to unblock the PDK from operating appropriately.

First, I've pushed the change to disable VGA so that Lomiri selects the correct output.

Secondly, I had to do some things to enable client apps to render. These MRs are important:

• https://gitlab.com/ubports/development/core/lomiri/-/merge_requests/278
• https://gitlab.com/ubports/development/core/rootfs-builder-debos/-/merge_requests/156

These changes make it so that client apps render using software codepaths instead of relying on hardware acceleration. At least something gets drawn on the screen:

This is a screenshot of the PDK running Morph Qt6 which has been installed using Clickable.

[jacquetc]

Thank you a lot for your input @emulti.

I wonder if there is a problem in the Onboarding for it to freeze like that with GTK qemu.

@fredldotme I understand that you consider your changes as workarounds and not definitive solutions ?

[fredldotme]

@jacquetc they're workarounds, yes. Ideally we would have client apps render using hardware acceleration. But this is better than nothing and unblocks the PDK from being usable.