[ThinkPad P1 and ThinkPad X1 Extreme] System got hang during the first boot.

[Gabriel Zhi Chen]

[Summary]
System got hang during the first boot.

[Steps to reproduce]
1. Install Ubuntu 20.04 beta image on ThinkPad X1 Extreme or P1
2. Unplug USB Live CD
3. Boot system and verify the result

[Expected result]
System boots up smoothly

[Actual result]
System got hang during the first boot.

[Failure rate]
100%

[Note]
The ThinkPad P1 and ThinkPad X1 Extreme are I+N configs
Even though system installed successfully in 'Safe mode', when user want to boot it up, system will got hang always.

There is a workaround:
1. Install Ubuntu 20.04 beta image on ThinkPad X1 Extreme or P1
2. Unplug USB Live CD
3. Boot system and enter grub
4. Add the kernel parameter 'nomodeset' and press 'Ctrl+X'
5. After log in successfully, install nvidia display driver
6. After the driver installed, reboot system.

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

This bug is missing log files that will aid in diagnosing the problem. While running an Ubuntu kernel (not a mainline or third-party kernel) please enter the following command in a terminal window:

apport-collect 1871562

and then change the status of the bug to 'Confirmed'.

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'.

This change has been made by an automated script, maintained by the Ubuntu Kernel Team.

[AaronMa (mapengyu)]

It's a known issue of nouveau.
The workaround should be used until nvidia property driver installed.

[Launchpad Janitor (janitor)]

[Expired for linux (Ubuntu) because there has been no activity for 60 days.]

[Mathew Hodson (mhodson)]

https://wiki.ubuntu.com/FocalFossa/ReleaseNotes

"Systems with an nVidia graphics card: These systems boot the live session by default with the open source video driver 'nouveau'. On some hardware this driver may crash which results in a freeze of the graphical session of the installer. If it happens, on the boot menu, select a 'Safe graphics mode' entry. Then in the installer, on the 'Preparing to install ...' page, select 'Install third party software ...' and continue. This option will install the nVidia proprietary drivers on the target system. Upon installation the proprietary drivers for your card will be loaded and the graphical session should work properly with optimized drivers."