Reply to "Ubuntu Kernel Bot" > This bug is missing log files that will aid in diagnosing the problem. > While running an Ubuntu kernel
The ISO doesn't boot on those machines, so I can't get to a terminal. > If, due to the nature of the issue you have encountered, you are unable > to run this command, please add a comment stating that fact and change > the bug status to 'Confirmed'. Done Walter, thanks again! I'll have to learn a little about EHCI so I can recognize it. As for xubuntu x86 daily ISO - I wrote one yesterday to test, but never got around to it I booted it on dell 755 (next to me as I type this), and "ehci-pci 000:00:1a.7: dma_direct_map_sg: overflow 0x0000000016ca56000+2048 of device mask ffffffff" (typed, so may not be exact). It did't continue endlessly, eventually getting to BusyBox. I only left one (lubuntu 18.10 image) system go for 30 mins (can't recall which; both use same keyd/mouse/screen), so maybe a lubuntu image will also drop to busybox if you want me to try... I'll add more when I can.. -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in 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 Status in linux package in Ubuntu: Confirmed Status in linux package in Debian: Unknown Bug description: -- 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. I'll add `lshw` files for the two failed systems To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1794922/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
