Comment # 1
on bug 102497
from Alex Deucher
(In reply to Bernhard Rosenkraenzer from comment #0) > > I presume the problem is caused by the (lack of) BIOS on aarch64 boards not > initializing the GPU the same way an x86 box does. > No, the driver is able to init the card regardless of whether the vbios has been posted or not. > This is on kernel 4.4.52 (latest kernel supported by the board; could try > pulling DRI patches from newer kernels if there's any hope of changes being > there already), libdrm 2.4.82 Here's the problem: > [Wed Jul 12 14:01:10 2017] [drm] Detected VRAM RAM=512M, BAR=0M There is no PCI BAR for frame buffer access. I'm guessing your pcie bridge does not have a large enough aperture for the frame buffer BAR. It's generally 256MB. The driver can't work without access to vram. Please attach your full dmesg output.
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