Freeze at shutdown/reboot of the system.

Griffin001 · 2020-04-25 11:46:28

From some time (probably around 1-2 months) I have been experiencing indefinitely long freezes at shutdown and reboot of the system 90% of the time.

What happens after I start the shutdown:

-Expected black screen appears
- Fans start working hard (but not at 100%)
- The only thing on the screen is the blinking underscore or the message: "watchdog didn't stop!" (but I have already addressed this case)
- This state lasts indefinitely if the computer is left alone, "spamming" random buttons on the keyboard somehow forces the shutdown (it doesn't work for some time after the initiation of the shutdown).

What I have tried:
-* setting up nowatchdog boot parameter and blacklisting watchdog module
-making sure my system doesn't use the latest dhcpcd as I have read it causes some problems. -> Now I have NetworkManager with dhclient and wpa_supplicant

Output of

journalctl -b -1

https://pastebin.com/ipfNdWfY

Some other potentially useful info:

I use grub for booting. My other system is Windows 10.

My system specs (output of lshw -short):

https://pastebin.com/A6jCQjDb

Last edited by Griffin001 (2020-04-25 11:47:40)

seth · 2020-04-25 12:57:40

Now I have NetworkManager with dhclient

Nope.

Apr 25 13:16:59 arch-pc NetworkManager[441]: <warn>  [1587813419.2684] dhcp-init: DHCP client 'dhclient' not available
Apr 25 13:16:59 arch-pc NetworkManager[441]: <info>  [1587813419.2684] dhcp-init: Using DHCP client 'internal'

Though I don't think that's the cause and there's nothing in the provided journal that would suggest a stall.
Wild guess (from your keypressing): https://wiki.archlinux.org/index.php/Rng-tools

Griffin001 · 2020-05-05 14:13:13

Cool. The installation of rng-tools worked. Thank you Seth.

Where could I learn more about the origin of the problem that occured?

seth · 2020-05-05 14:21:42

The problem is touched on eg. here:
https://wiki.archlinux.org/index.php/Ra … generation
https://wiki.debian.org/BoottimeEntropyStarvation
https://stackoverflow.com/questions/209 … starvation

Something during or before the reboot sucks all the entropy out of the pool (and because there's no further input it cannot be regenerated)

Arch Linux

#1 2020-04-25 11:46:28

Freeze at shutdown/reboot of the system.

#2 2020-04-25 12:57:40

Re: Freeze at shutdown/reboot of the system.

#3 2020-05-05 14:13:13

Re: Freeze at shutdown/reboot of the system.

#4 2020-05-05 14:21:42

Re: Freeze at shutdown/reboot of the system.

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