Created attachment 852446 [details]
hwinfo, dmesg, usb-devices and lsusb with and without XHCI enabled in BIOS,
normal boot and kexec boot

Hardware is an Intel NUC (D54250WYK).

With XHCI enabled in the UEFI BIOS, USB devices are not available
after a kexec reboot.  Hence the boot failed in the initrd when I had
USB attached disks referenced in /etc/fstab.  When I commented these
out, the boot succeeded but the keyboard and mouse did not work after
a kexec reboot.

With XHCI disabled in the BIOS, kexec works as expected.

On this hardware using Tumbleweed at some time in the past (but I'm
afraid I don't know when) kexec worked with XHCI enabled.

Linux jabberwock 5.14.0-1-default #1 SMP Mon Aug 30 07:01:36 UTC 2021 (dc06e24)
x86_64 x86_64 x86_64 GNU/Linux

NAME="openSUSE Tumbleweed"
# VERSION="20210908"
ID="opensuse-tumbleweed"
ID_LIKE="opensuse suse"
VERSION_ID="20210908"
PRETTY_NAME="openSUSE Tumbleweed"
ANSI_COLOR="0;32"
CPE_NAME="cpe:/o:opensuse:tumbleweed:20210908"
BUG_REPORT_URL="https://bugs.opensuse.org"
HOME_URL="https://www.opensuse.org/"
DOCUMENTATION_URL="https://en.opensuse.org/Portal:Tumbleweed"
LOGO="distributor-logo"