I experienced this bug when trying to start Ubuntu 18.04.2 Live DVD on an ASUS R515M.
What happened was that the screen was blank, at first I thought the issue is with UEFI... I edited grub boot options for Linux (adding "nomodeset" instead of "quite splash") and then I saw the logs about r8169, where loading stopped.
I tried following the instructions from this bug report to disable LAN from the BIOS, but to no avail (there wasn't such an option, at least I couldn't find it).
The workaround finally was to add to the grub boot options: "modprobe.blacklist=r8169".
With this I managed to start Ubuntu Live DVD.
I experienced this bug when trying to start Ubuntu 18.04.2 Live DVD on an ASUS R515M.
What happened was that the screen was blank, at first I thought the issue is with UEFI... I edited grub boot options for Linux (adding "nomodeset" instead of "quite splash") and then I saw the logs about r8169, where loading stopped.
I tried following the instructions from this bug report to disable LAN from the BIOS, but to no avail (there wasn't such an option, at least I couldn't find it).
The workaround finally was to add to the grub boot options: "modprobe. blacklist= r8169".
With this I managed to start Ubuntu Live DVD.
May be useful for someone :)