Re: Regression: system freeze on resume from suspend introduced by printk per-console suspended state

From: pv

Date: Wed Jan 07 2026 - 19:05:44 EST


Hi, I am resending the message from December 23 because lkml considered it as spam.

First, thank you for your response.

> It is great that you can reproduce it with 6.18.2. Are you also able to
> test 6.19-rc1 and reproduce it? It would be nice to attack the problem
> from the latest code first.

The code in 6.18.2 has changed enough that I don't dare change it as I did in 6.7.
After compiling and installing 6.19-rc1 (8f0b4cce4481fb22653697cced8d0d04027cb1e8),
I can confirm that the freeze is still present.

> It would be helpful to know if you are doing anything special (like
> using "no_console_suspend") or have multiple consoles. Could you send
> the output of:
>
> $ cat /proc/consoles
>
> and
>
> $ cat /proc/cmdline
>
> Once we have this information, we can start to dig deeper.

$ cat /proc/consoles
tty0 -WU (EC p ) 4:2

$ cat /proc/cmdline
BOOT_IMAGE=/boot/vmlinuz-6.5.0-5-amd64 root=/dev/mapper/vg0-root ro cryptdevice=UUID=397b50bf-8142-4456-8af2-bf39dcc8f732:cryptdisk:allow-discards mitigations=off quiet splash

It's similar for 6.19.0-rc1.

$ cat /sys/module/printk/parameters/console_suspend
Y

Thank you for your time.
Best regards.