hildon-desktop doesn't render correctly

I'm trying to run hildon-desktop on lima driver. Before it hung early on, anarsoul suggested that I try again, and this time it renders the initial screen. I've made an apitrace, like so:

DISPLAY=:0 CLUTTER_BACKEND=x11 HD_NOTHREADS=yes CLUTTER_DRIVER=gles2 apitrace trace -o hildon-desktop-apitrace.log -a egl /usr/bin/hildon-desktop.launch

Output trace file is here: https://wizzup.org/hildon-desktop-apitrace.log

I build mesa from commit 096a0d05 ; and the kernel tree is here https://github.com/maemo-leste/lime2-linux/tree/lime2-and-twister-4.19-rc4 (it's basically linux@15b43d77 plus some allwinner patches for spi screens)

I hope the apitrace is useful, please let me know if I need to generate it differently. hildon-desktop is also available from this debian repo, for armel, armhf, aarch64 and amd64: https://maedevu.maemo.org/leste/