[fedora-arm] Re: Raspberry Pi 4 issues with Fedora Rawhide

On Thu, 20 Jun 2024 at 16:50, Frantisek Zatloukal <fzatlouk@redhat.com> wrote:
>
>
> Hey Peter,
>
> On Thu, Jun 20, 2024 at 5:41 PM Peter Robinson <pbrobinson@gmail.com> wrote:
>>
>> > * gsk: vulkan renderer breaks gtk4 apps on Raspberry Pi 4 and 400 [1]
>> > GSK now defaults to vulkan and it causes problems on RPi, I initially
>> > encountered crashing gnome-initial-setup (and later that all GTK4 apps are
>> > crashing upon startup). Thus I proposed it as a F41 Beta blocker. This
>> > crashing on app startup will be resolved in the next GTK release, the fix is
>> > already merged.
>> > However, there are still issues with GTK4 apps [2], all related to vulkan
>> > renderer [3] [4] [5]. It is not yet clear if the problems are bugs in GTK or
>> > mesa. In the end, if proven difficult to fix, we could always switch back to
>> > older renderer as suggested by Adam during F40 cycle [6].
>>
>> What is GSK? Was there an official Fedora change for the switch to Vulkan?
>
>
> That would be the GTK Scene Graph Kit (part of the rendering pipeline in GTK?) . It's an upstream change, so I am not sure if a change is needed (I am not saying it's not, just don't know). They've (GTK upstream) made a change from gl to ngl renderer in Fedora 40 [0] (there was an issue on RPI 4 caused by it that got resolved before the GA [2]), and the current devel version of GTK 4 in rawhide changed that once again from ngl to vulkan.

That should definitely be a change in Fedora.

> [0] https://gitlab.gnome.org/GNOME/gtk/-/merge_requests/6809
> [1] https://gitlab.gnome.org/GNOME/gtk/-/merge_requests/7153
> [2] https://bugzilla.redhat.com/show_bug.cgi?id=2269412
>
> --
>
> Best regards / S pozdravem,
>
> František Zatloukal
> Senior Quality Engineer
> Red Hat
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