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Re: system stops

On Sun, Jan 27, 2019 at 09:11:33PM +0100, BELAHCENE Abdelkader wrote:
> Sometimes (maybe often) when I leave the system for a times without
> touching it, when I come back, the system is frozen , juste the pointer of
> mouse can move, but nothing else,  keyboard doesn't respond,  even
> ctrl+alt+F1 , or F2,  ...

> Jan 27 20:29:52 mx kernel: [11477.409506] PM: suspend exit
> Jan 27 20:29:52 mx kernel: [11476.619289] sd 0:0:0:0: [sda] Starting disk
> Jan 27 20:29:52 mx kernel: [11476.091515] ACPI: Waking up from system sleep state S3
> Jan 27 20:29:52 mx kernel: [11476.082190] ACPI: Low-level resume complete

Looks like your system is waking up from being suspended/hibernated.

Try disabling suspension/hibernation and see if that prevents the issue.
Something with the power management and system resume might not be
working correctly.

I am not very familiar with Linux hibernation, so there's not much more
I can help with here.