Comment # 16 on bug 1194373 from Felix Miata

Happening on Kaby Lake using michal's test kernel from:
https://download.opensuse.org/repositories/home:/michals:/kernel-test/standard/

[     3.998] Current Operating System: Linux gb250 5.16.10-1.g6b8c986-default
#1 SMP PREEMPT Wed Feb 16 21:51:50 UTC 2022 (6b8c986) x86_64
[     3.998] Kernel command line: BOOT_IMAGE=/boot/vmlinuz root=LABEL=pi3p07stw
noresume ipv6.disable=1 net.ifnames=0 mitigations=auto video=1440x900@60
vga=791 5
...
[     5.971] (II) config/udev: removing GPU device
/sys/devices/platform/simple-framebuffer.0/drm/card0 /dev/dri/card0
[     5.972] (EE) 
[     5.972] (EE) Backtrace:
[     5.972] (EE) 0: /usr/bin/Xorg.bin (xorg_backtrace+0x85) [0x55ebb6afdfc5]
[     5.972] (EE) 1: /usr/bin/Xorg.bin (0x55ebb6927000+0x1d8ac5)
[0x55ebb6affac5]
[     5.972] (EE) 2: /lib64/libc.so.6 (0x7f7edc151000+0x56420) [0x7f7edc1a7420]
[     5.972] (EE) 3: /lib64/libc.so.6 (0x7f7edc151000+0x19cce5)
[0x7f7edc2edce5]
[     5.972] (EE) 4: /usr/bin/Xorg.bin (0x55ebb6927000+0xc687f)
[0x55ebb69ed87f]
[     5.972] (EE) 5: /usr/bin/Xorg.bin (0x55ebb6927000+0xc7855)
[0x55ebb69ee855]
[     5.972] (EE) 6: /usr/bin/Xorg.bin (0x55ebb6927000+0xc7968)
[0x55ebb69ee968]
[     5.972] (EE) 7: /usr/bin/Xorg.bin (0x55ebb6927000+0x1dbcc1)
[0x55ebb6b02cc1]
[     5.973] (EE) 8: /usr/bin/Xorg.bin (WaitForSomething+0x1e0)
[0x55ebb6afc970]
[     5.973] (EE) 9: /usr/bin/Xorg.bin (0x55ebb6927000+0x4c3d1)
[0x55ebb69733d1]
[     5.973] (EE) 10: /lib64/libc.so.6 (0x7f7edc151000+0x405c0)
[0x7f7edc1915c0]
[     5.973] (EE) 11: /lib64/libc.so.6 (__libc_start_main+0x7e)
[0x7f7edc19167c]
[     5.973] (EE) 12: /usr/bin/Xorg.bin (_start+0x25) [0x55ebb6973ea5]
[     5.973] (EE) 
[     5.973] (EE) Segmentation fault at address 0x0
[     5.973] (EE) 
Fatal server error:
[     5.973] (EE) Caught signal 11 (Segmentation fault). Server aborting

Is this because it boots so fast from NVME that /dev/dri/card0 isn't ready yet?
cf.
https://bugzilla.opensuse.org/show_bug.cgi?id=1193250#c34