Ubuntu 22.04 freezing on a lenovo ThinkPad x201

[Ian Bruntlett]

Hi,

TL;DR. The bug was introduced after Ubuntu 21.10. It stops Ubuntu from
being installed.

Details...

The bug. When I boot Ubuntu 22.04 x86_64 install media (USB flash drive
formatted with VENTOY) , it crashes, most often in the initial stages of
the Ubuntu installer. By crash, I mean the display does not change, the
keyboard is ignored, and the mouse/trackpad cursor does not move either. I
have also tried installing Ubuntu 22.04 from a dedicated USB flash drive
and Ubuntu also crashed. So I don't think it is a VENTOY problem.

I've been doing more testing.

1. I did a full pass of memtest86+ 5.01 from the SSD in the x201 (the one
with Ubuntu 18.04.6 on) with no errors.

2. Using a USB flash drive formatted with VENTOY, I booted Ubuntu 21.04,
chose "Try Ubuntu" and the system ran fine for 15 minutes running top and 2
bash terminal windows (which was enough for me to consider it OK). Kernel
is 5.11.0-16 14th April 2021.

3. Using a USB flash drive formatted with VENTOY, I booted Ubuntu 21.10,
chose "Try Ubuntu" and the system ran fine for 15 minutes running top and 2
bash terminal windows (which was enough for me to consider it OK). Kernel
is 5.13.0-19 7th Oct 2021.

4. I will be available tomorrow and some time tonight for more testing.

5. Because the system freezes quite early on, it is nearly impossible to
run ubuntu-bug on behalf of Ubuntu 22.04.

HTH,


Ian

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