I think you picked up on this in the other thread, but this sounds like it's due to missing the needed fixes in Mesa 19.1. From what I've read Ubuntu 19.04 uses Mesa 19.0 (Mesa 19.1 released in June, while the 04 means April), which is bound to fail with a black screen.
Instructions for cross-compiling Mesa: Raspberry Pi cross compile wiki. Usually works well for me, but if anyone has a ppa with a 19.1+ armhf build, would be great to use that instead.
Or did you get RaspEX running on the metal prior? If so, then I'd be more inclined to believe KVM is at fault here.
Thanks sakaki. Good to hear anyone can use 3 GB now, dispmanx works, and it's probably just a configuration issue for camera interfaces.sakaki wrote: ↑Tue Jul 30, 2019 10:17 pmminimal (!) testing I did showed (under fkms):
- total_mem > 3072 breaks USB (but system still usable-ish if rootfs on microSD) with latest kernels; bounce-buffers apparently needed but not yet implemented in aarch64 (see e.g. this comment, and this one);
- I'm having trouble getting HDMI audio to work with the most recent 64-bit kernels; but that may just be something in my local setup;
- vlc --vout mmal_vout and omxplayer don't work, ton of mmal errors from the former; didn't try kodi;
- dispmanx works (at least things like hello_dispmanx do);
- no sign of the camera or v4l2 interfaces, even under the -bis kernel that supposedly turns them on (and even when booted with the appropriate firmware), but I may just have missed a setting there; this is on my todo list;
- FIQ - don't know the correct answer here, @6by9? Also see below quote from rst.
Regarding accelerated video decode, I thought that was supposed to work according to 6by9's comment back in January?