Re: [meta-ti] core-image-sato scarthgap beaglebone x11 startup error

[Denys Dmytriyenko <denis@denix.org>]

On Tue, May 06, 2025 at 04:55:20PM -0500, Randolph Sapp wrote:
> On Tue May 6, 2025 at 11:29 AM CDT, Denys Dmytriyenko wrote:
> > + Randolph
> >
> > Unlike yocto-bsp, which uses vanilla mainline kernel with unaccelerated 
> > framebuffer, meta-ti by default enables accelerated graphics with out-of-tree 
> > drivers and user-space GLES libraries - SGX in case of Beaglebone and AM335x.
> >
> > When meta-ti migrated from 6.1 kernel to 6.6, I believe X11 support was 
> > dropped. It should still be possible to fall back to unaccelerated framebuffer 
> > and get X11 working, but that's not something that is configured nor tested in 
> > meta-ti.
> 
> This was not a result of a kernel change, it was due to a Yocto lts version
> change. A lot of layers use a common PACKAGECONFIG pattern that configures
> packages to use Desktop GL instead of GLES when opengl and x11 distro features
> are enabled. Arago took a hard stance that we will disable x11 to avoid
> reconfiguring numerous packages for partial acceleration under x11. Users can
> try it, but they will need to be careful when configuring things.

I thought some x11 specifics were dropped over a year ago from umlibs/DDK, 
which is in meta-ti and not specific to Arago...

But in general I agree that this can be reconfigured with unaccelerated x11 
for anyone adventurous enough :)


> > On Tue, May 06, 2025 at 07:57:48AM -0700, Sebastian via lists.yoctoproject.org wrote:
> >> I've tested meta-ti for kirkstone the xserver starts up correctly into an X 
> >> session.
> >> 
> >> With meta-ti for scarthgap it fails. As it looks for a /dev/fb device which 
> >> is not present.
> 
> Can you elaborate on this? Missing framebuffer devices is actually a display
> controller related issue. If you have a splash screen then some fb device is
> being registered. What device is this for?

That's Beaglebone Black. But more logs from the reporter could be helpful.


> >> Aside of this, with kirkstone and scarthgap in yocto-bsp and 
> >> beaglebone-yocto it works in both cases.
> >> 
> >> The framebuffer is filled up by the splash screen also in powering down.
> >> 
> >> What am I missing?
> >> 
> >> What info to supply?
> >> 
> >> Regards,
> >> 
> >> Sebastian