@Pascal-Gazaille This might be caused by an IRQ conflict. Not really sure but could be. Please boot into debug mode once again. Then you need a USB key (formated fat32/vfat). Plug that into the client when you have the FOG shell ready. Check if it’s recognized. Then mount and save the kernel message buffer to USB.
# dmesg | tail
...
[1571962.482081] sd 24:0:0:0: Attached scsi generic sg1 type 0
[1571962.482902] sd 24:0:0:0: [sdb] 1992704 512-byte logical blocks: (1.02 GB/973 MiB)
...
[1571962.488602] sdb: sdb1
[1571962.491966] sd 24:0:0:0: [sdb] Attached SCSI removable disk
...
# mkdir -p /media
# mount /dev/sdb1 /media
# dmesg > /media/dmesg.txt
# umount /dev/sdb1
Then please upload the file to the forum here.