~eliasnaur/gio#49:
Raspbian / Raspberry pi: floating point fbos not supported

I just tried running the example using go run gioui.org/example/hello on raspbian with no luck - its exits right away with an error saying floating point fbos not supported - exit status 1.

Raspbian is fully updated and i downloaded and build wayland and weston from source, weston 7.0.90. It seems to otherwise work just fine on the pi.

Status
REPORTED
Submitter
~fasmide
Assigned to
No-one
Submitted
16 days ago
Updated
16 days ago
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~eliasnaur 16 days ago

On Sun Oct 27, 2019 at 7:31 PM ~fasmide wrote:

I just tried running the example using go run gioui.org/example/hello on raspbian with no luck - its exits right away with an error saying floating point fbos not supported - exit status 1.

Raspbian is fully updated and i downloaded and build wayland and weston from source, weston 7.0.90. It seems to otherwise work just fine on the pi.

Which raspberry pi version? In particular, what is the GPU model and driver version? Unfortunately, Gio can't currently run without floating poing FBO support.

~fasmide 16 days ago

Its the Raspberry Pi 3 model B rev 1.2 using the BCM2835 soc. I'm not sure how to figure out the driver used by weston (wayland?), but when it loads it says its using the drm-backend.so. Before i could get the thing started, i had to enable DRM VC4 driver in /boot/config.txt - but i basically have no idea what i'm doing with weston/wayland :)

Its a 4.19.75-v7+ kernel...

I just saw the X11 support merged - very nice - ill give it a try without wayland...

~fasmide 16 days ago

Same result on X11

Xorg.0.log https://pastebin.com/ZZKcdz1P

~fasmide 16 days ago

and dmesg https://pastebin.com/3GWmFRrT

~eliasnaur 16 days ago

On Sun Oct 27, 2019 at 9:51 PM ~fasmide wrote:

and dmesg https://pastebin.com/3GWmFRrT

Yeah, a quick Google search reveals that the VideoCore 4 is a OpenGL 2.0 class GPU and will probably never support floating point FBOs. It's possible that Gio will run without floating point FBO in the future, but I don't have plans to work on it.

-- elias

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