I note the linked report is 32 bit as well. Can you confirm this does NOT occur on a 64 bit machine? Be very careful if you're using a 64 bit machine that it's more likely to not have an EHCI controller. Roughly speaking, EHCI is 2.0-level USB while xHCI is 3.0 (UHCI being 1.0, which requires some additional memory hardware to support 64 bit FWIW). Since the errors relate to EHCI, this is going to be crucial. `lspci | grep HCI` should help out in that regard. It also might be good to check a 32 bit kernel on a 64 bit machine if you can get that test out of the way.
It is possible this may affect other controller architectures, but I doubt it. On the other hand, EHCI can handle 1.0 and 2.0 devices and will likely downgrade a 3.0 device to 2.0 speeds. If it's possible, checking all those different ones will likely prove helping in understanding the scope of the problem. ** Tags removed: cosmic ** Tags added: lubuntu -- You received this bug notification because you are a member of Ubuntu 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 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1794922/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
