Ubuntu 18.04.2 LTS amd64 installer hangs shortly after boot unless acpi=off and noapic

[Dan Kortschak]

Booting an Ubuntu 18.04.2 LTS amd64 installer USB on a Clevo P650RE3 results in a hang shortly after the desktop is presented, unless acpi=off and noapic (or nolapic) are given as kernel boot parameters. The same installer runs without issue on other machines and the 16.04 installer runs without issue on the P650RE3.

Without passing acpi=off and noapic, a desktop comes up and a terminal can be obtained, but keystrokes and mouse clicks are not responded to after a small number of seconds. The mouse pointer continues to move with trackpad input.

With careful timing I was able to obtain, uname, dmidecode and (an empty) lspci output. I was not able to obtain any /proc/acpi information, but do have dmesg. These are all attached. With acpi=off and noapic, I can get lspci and dmidecode output, but obviously no /proc/acpi. In this case the lspci output is not impty and dmidecode is identical to the failing case.

[Dan Kortschak (dan-kortschak)]

lspci.txt is empty

[Dan Kortschak (dan-kortschak)]

acpi.tar.bz was not obtainable

[Ubuntu Kernel Bot (ubuntu-kernel-bot)]

This change was made by a bot.

[Kai-Heng Feng (kaihengfeng)]

Please try Safe Graphics mode in Disco live USB.

[Dan Kortschak (dan-kortschak)]

What magic is required to get into safe graphic mode from the Disco live USB? (normal boot on that version fails in the same way)

[Dan Kortschak (dan-kortschak)]

Ah, you mean nomodeset. I have tried that now with both 18.04 and 19.04 with success. Both live USBs are stable for at least 10 minutes.