Good news! I was able to work around the issue by enabling host I/O cache in the virtual machine settings. Go to "Storage", select "Controller: SATA", and enable "Use Host I/O Cache".
I'm not sure what changed in the Linux kernel to make this change necessary, but I wonder if kernels earlier than 4.18 were using the file cache even if the option was disabled in VirtualBox. Someone with a better knowledge of the Linux Kernal and/or VirtualBox would need to answer that question. Hopefully this will solve the problem for others as well. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/947664 Title: Unpacking linux-headers unbelievably slow in Lubuntu Precise (Beta 1) To manage notifications about this bug go to: https://bugs.launchpad.net/dpkg/+bug/947664/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
