Public bug reported: Using the generic arm64 kernel on my raspberry pi 3 it seems impossible to use any apps that require 3D graphics. The X session crashes and a reboot is needed to make it bootable again.
Inspecting dmesg, there are a lot of "failed to allocate CMA" messages. Adding cma=256M to the kernel command line has no effect. Dropping resolution allows firefox to start, but 3D apps still fail. I believe the vc4 driver needs CONFIG_DMA_CMA=y, which currently the generic kernel does not set. The raspi2 kernel has this and 3D graphics works. ** Affects: linux (Ubuntu) Importance: Undecided Status: Confirmed ** Changed in: linux (Ubuntu) Status: New => Confirmed -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1803206 Title: Please enable CONFIG_DMA_CMA=y on arm64 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1803206/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs