did a test on a hp 8200 elite sff (i5-2400, 8gb, nvidia quadro 600)

gui screen shows blue background, lubuntu (logo) and dots (normal plymouth)
text screen shows

[ 99.999999] ehci-pci 0000:00:1d.0:dma_direct_map_sg: overflow
0x0000000223ad7000+2048 of device mask ffffffff

scrolling by endlessly...  (till I rebooted at ~1650.999999 timestamp
message)

alas lubuntu 18.10 x86 image was maybe 2 days old..
I updated image to latest, same result (but I didn't wait as long)


** Attachment added: "lshw_hp_8200.txt"
   
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1794922/+attachment/5198943/+files/lshw_hp_8200.txt

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https://bugs.launchpad.net/bugs/1794922

Title:
  lubuntu 18.10 x86 (32bit) image fails to load "ehci-pci 0000:00:a.7:
  dma_direct_map_sg: overflow 0x000000016e3f3000+2048 of device mask
  ffffffff" repeats

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