Envi problem with kernel 6.19

[sthifen]

I'm trying to build WBeam on Fedora 43 with kernel 6.19.11.

I fixed the initial GStreamer dependency issue, but now I'm blocked by EVDI.

EVDI fails to compile with many errors like:
"comparison of integer expressions of different signedness [-Werror=sign-compare]"
coming from kernel headers (cleanup.h, spinlock.h, etc).

As a result:

• evdi module is not built
• modprobe evdi fails
• WBeam linking fails with: cannot find -levdi

System:

• Fedora 43
• Kernel 6.19.11
• gcc 15

It seems EVDI is not compatible with this kernel due to -Werror and newer kernel changes.

Is there a known workaround or supported kernel version?

[ppotepa]

@sthifen thank you for your findings, excuse me the delay - never actually expected anyone genuinely using it, i will try to investigate that will keep you posted

[ppotepa]

Prepared branch for this issue: issue/96-fedora-evdi-bootstrap

Relevant changes on the branch:

• Fedora setup bootstrap: scripts/fedora-setup.sh
• host build preflight for GLib/GStreamer native deps
• EVDI is no longer required for the default local build; if libevdi.so is missing, wbeamd-streamer builds without EVDI support and can use Wayland/X11 fallback
• redeploy-local auto-installs Fedora host deps and Android SDK for the normal local deploy flow
• Java 21 is selected for Android Gradle builds to avoid Java 25 / class-file-version failures

For EVDI specifically, the branch avoids blocking Fedora/kernel 6.19 users on -levdi unless EVDI is explicitly requested.

[ppotepa]

@sthifen please feel free to check the recent changes - the entire fedora bootstrap has been reworked.
https://github.com/ppotepa/WBeam/tree/issue/96-fedora-evdi-bootstrap

[ppotepa]

@sthifen thanks for the Fedora/EVDI report. I pushed a branch for this issue:

Branch: https://github.com/ppotepa/WBeam/tree/issue/96-fedora-evdi-bootstrap

Current Fedora 43 flow on that branch:

git fetch origin
git switch issue/96-fedora-evdi-bootstrap
git pull
./redeploy-local

./redeploy-local is now the main local entrypoint. On Fedora it bootstraps missing native deps, Android SDK components, GStreamer/OpenH264, and EVDI/DisplayLink where possible, then builds host + streamer, builds/deploys the Android APK, and launches the desktop UI.

Manual steps can still be required for OS/device trust boundaries:

• Secure Boot MOK enrollment: reboot, choose Enroll MOK -> Continue -> Yes, then rerun ./redeploy-local.
• video group changes: log out/in, then rerun ./redeploy-local.
• Android device prompts: accept USB debugging and allow APK install.

Desktop UI:

./desktop.sh

Android app manual flow, if needed:

./wbeam android build
./wbeam android install
./wbeam android launch
# or all together:
./wbeam android deploy

Relevant fixes on the branch:

• Fedora setup script installs native build deps and Android SDK packages.
• EVDI setup tries distro packages, then DisplayLink RPM release fallback.
• Secure Boot/MOK pending-reboot state is detected and reported.
• DisplayLink libevdi.so under /usr/libexec/displaylink is handled for linking/runtime.
• If H.265 encoders are unavailable, streamer falls back to H.264/OpenH264 instead of failing.

Docs were updated in README.md, docs/FEDORA_43_SETUP.md, and docs/EVDI_SETUP_GUIDE.md with the clean Fedora validation flow.

[ppotepa]

Linked this work through draft PR #98: #98

The PR uses branch issue/96-fedora-evdi-bootstrap and references this issue with Refs #96, so GitHub should show it in the issue development links.

[ppotepa]

also please note there is still plenty of small bugs regarding UI and the app flow overall.
app was created in a rush since it helped me a lot with day to day activities