> I'd *guess* that's a limitation due to u-boot, but I'll try and find > time to test the kernel alone to confirm that. Obviously it's > something we'll want to sort out fairly quickly but I suspect it'll > have to be post-release at this point.
For me, the Raspberry never leaves the rainbow screen if I omit the total_mem=1024. So it doesn't seem to be a thing with u-boot (which I don't use). I've read reports of people that can boot their (custom) kernels with 3GB RAM but get lockups with 4GB ... so I'll experiment with that, too. But they might have been using a 32bit kernel. This guy built a custom system image (with custom kernel) based on bionic that seems to be able to access all 4GB: https://jamesachambers.com/raspberry-pi-4-ubuntu-server-desktop-18-04-3 -image-unofficial/ But since I want to use the official kernel, I never tested it. However, he has the kernel config and boot config on his GitHub (link is on that page). So maybe this helps. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1847163 Title: [FFe] Firmware bump for Pi 4 boot support To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-firmware-raspi2/+bug/1847163/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
