On Wed, Sep 1, 2021 at 2:40 PM EpicLemon99 <EpicLemon99@xxxxxxxxxxxxxx> wrote:
I am unable to boot up ISO files of Linux distributions that use systemd. My computer is a HP Pavilion TG01-2856no, it is recent hardware. The boot gets stuck when it tries to start systemd services, such as Network Time Synchronization.
For example, there are the messages I get when trying to boot up the Arch Linux ISO: https://imgur.com/a/oKGjZk7
Booting it with the kernel argument init=/bin/bash however works.
Boot it with the 'systemd.debug-shell' option and take a look (via tty9) at what systemd-udevd is doing. I'm guessing that one of its worker processes tried to interact with a device (e.g. read information from /sys or do some active probing), but due to either hardware issue or driver bug, the syscall got stuck in the kernel and never returned. So check /proc/PID/stack of the udev worker processes, I guess?
(The same issue might be occurring even on installed systems, only they don't *wait* for udev to finish handling every single device (systemd-udev-settle), so the process might just remain hung in background.)
Mantas Mikulėnas
