** Description changed:
-- Background --
Testing the x86 (32bit) ISO image on various machines.
After zsync download, the thumb-drive is tested ("check disk for
defects") & passes; and worked fine on two systems today (dell d610 & hp
dx6120), however
-- Issue --
dell 755 (desktop) & hp dc7700 (small form factor) it just sits at
lubuntu plymouth screen.
switching to messages, it's just the following repeating
// on dell 755
"ehci-pci 0000:00:1a.7: dma_direct_map_sg: overflow 0x000000016e3f3000+2048
of device mask ffffffff"
// on hp dc7700
"ehci-pci 0000:00:1a.7: dma_direct_map_sg: overflow 0x0000000162317000+2048
of device mask ffffffff"
NOTE: I can't copy/paste from systems, as it never completes boot; I
left it >30mins (on 755) & it just kept repeating message. I've manually
typed it; so typo's could have been made.
A discussion on #lubuntu-devel provided a possible cause (Thank you
Walter!) -
---
<wxl> guiverc: lyorian:
http://debian.2.n7.nabble.com/Bug-908924-dma-direct-map-sg-overflow-on-USB-access-after-upgrade-to-kernel-4-18-td4387757.html
<wxl> seems like it's a usb issue of some kind with 4.18
---
This fits because whilst I do my testing mostly on d610 & t43 (no issues
today), I'd tested Lubuntu 18.10 before on the dell 755 with no issues.
- My last test was also long enough ago to be on 4.17 kernel.
+ My last test was also long enough ago to be on 4.17 kernel (suspicion)
- I'll add `lshw` files for the two failed systems
+ ---
+ // on hp 8200 elite sff (i5-2400, 8gb, nvidia quadro 600)
+ [ 99.999999] ehci-pci 0000:00:1d.0:dma_direct_map_sg: overflow
0x0000000223ad7000+2048 of device mask ffffffff
+ errors on booting 'live' (see #16) for real
+ BUT
+ the same ISO works fine on same box when a virtual machine (Virtual box on a
GNU/Linux host and "Type: Linux Version: Ubuntu (32-bit)" virtual machine)
--
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Bugs, which is subscribed to Ubuntu.
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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