Crash without display on RPi4 8Gb

[Peter Robinson]

Hey Mattias,

In testing the RPi4 8Gb I've run into an interesting crash, not seen
it on either a 4Gb or 2Gb mode, and I'm wondering if you're aware of
it. It occurs with either the latest firmware or one from April 1st.

If I boot without a display connected, so just via serial console, I
see the following crash. If I plug a display in (I've only tried the
HDMI port next to the USB-C power it boots fine. I also don't see the
crash on 2020.07, just the 2020 RCs, tried rc1 and rc5.

I vaguely remember something similar to this in the past but I've not
managed to find a reference yet.

Peter

U-Boot 2020.10-rc5 (Sep 27 2020 - 00:00:00 +0000)

DRAM:  7.9 GiB
RPI 4 Model B (0xd03114)
MMC:   mmcnr at 7e300000: 1, emmc2 at 7e340000: 0
Loading Environment from FAT... *** Warning - bad CRC, using default environment

In:    serial
Out:   serial
Err:   serial
Net:   eth0: ethernet at 7d580000
PCIe BRCM: link up, 5.0 Gbps x1 (SSC)
starting USB...
Bus xhci_pci: probe failed, error -110
No working controllers found
Hit any key to stop autoboot:  0
switch to partitions #0, OK
mmc0 is current device
"Synchronous Abort" handler, esr 0x96000004
elr: 000000000009c1d4 lr : 0000000000091d60 (reloc)
elr: 000000003df751d4 lr : 000000003df6ad60
x0 : d519b040aa010000 x1 : 000000000000005c
x2 : 0000000000800000 x3 : 000000003dfd2e50
x4 : b900080152b00000 x5 : 000000000000005c
x6 : 000000003dfd2e50 x7 : b900080152afff90
x8 : fffffffffffffff0 x9 : 0000000000000008
x10: 000000003db5eb30 x11: 000000003db63ef0
x12: 0000000000000000 x13: 0000000000000200
x14: 000000003db48fb0 x15: 0000000000000021
x16: 000000003df772a4 x17: 118e7ea1df36071f
x18: 000000003db54d90 x19: 0000000000000070
x20: 000000003dfd2890 x21: 0000000000000000
x22: 0000000000000005 x23: 000000000000000a
x24: 0000000000000000 x25: 000000003dfe5114
x26: 000000003dfbe8b7 x27: 000000003dfc7090
x28: 0000000000000065 x29: 000000003db47ad0

Code: eb03005f 54ffff43 f9400ca4 17ffffe0 (f9400404)
Resetting CPU ...

resetting ...