What's system-level tracing? What are the most frequently used methods?

[Ralf Mardorf]

On Thu, 9 Jul 2020 13:00:00 +0800, sunshilong wrote:
>I am facing a hang on Ubuntu. Some expert suggest me to solve this
>problem by system-level tracing. But I am not familiar with it. I hope
>to know which are most frequently used.

Hi,

please run

  lsb_release -a

and post the command and it's output. IIRC we still don't know what
version of Ubuntu you are running.

I don't remember, if you are using a kernel from official repositories.
If not, install a kernel from official repositories and try booting
this kernel.

Then again, if it should fail, boot an Ubuntu live media

1. of the same Ubuntu release
2. if available of an older Ubuntu release
3. if available of a newer Ubuntu release

if all of them should fail, test a live FreeBSD, https://nomadbsd.org/
or any other operating system.

Did you check your install media against a signed checksum,
https://ubuntu.com/tutorials/how-to-verify-ubuntu#1-overview ?

Tracing a probably tainted install, without even having the will of
googling a little bit on your own, is a mere waste of time for you and
everybody trying to help you.

By the way, what industrial PC are you using? Is its firmware
up-to-date?

Regards,
Ralf