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RE: Hibernation with ThinkPad T14 AMD Gen 1 + 2

	Hello Martin,

I’ve a Thinkpad P14s AMD Gen1 (P14s is similar to T14). 
At the beginning, the faulty BIOS firmware was an actually plague (high battery drain in suspend and even in hibernation modes !), then the hibernation drain was fixed (but not the drain in suspend  mode, sadly), and I use hibernation since quite a long time on this laptop.

I got some problems on resume when trying to use a tip found on internet to reduce hibernation’s memory consumption (and so hibernating time), executing  'echo 0 > /sys/power/image_size' after each boot.

I’ve disabled this command and since then, no problem.
I’ve only noticed since last kernel update (6.0 from bullseye backports) that when resuming, I don’t get the graphical screen (lock screen) but a black screen instead, but I get it back switching consoles (C-A-F1 then C-A-F7)…

	Hope it helps,

-----Message d'origine-----
De : Martin Steigerwald <martin@lichtvoll.de> 
Envoyé : jeudi 8 décembre 2022 13:38
À : debian-laptop@lists.debian.org
Objet : Hibernation with ThinkPad T14 AMD Gen 1 + 2


Back then when I bought the first ThinkPad T14 AMD Gen 1 I had memory corruption issues after resuming from hibernation several times. Which led to general protection faults and BTRFS filesystem errors. This also happened with sleep mode set to Linux. It was one with AMD Ryzen 7 PRO 4750U and 32 GiB RAM.

Since that time I do not hibernate any of the ThinkPad T14 AMD laptops anymore. Including a ThinkPad T14 AMD Gen 2 one.

But I'd like to revisit that decision since there have been a lot of major kernel updates in between. But before risking the integrity of any of the filesystems on one of those machines again during testing, I'd like to gather feedback:

Anyone here hibernating a ThinkPad T14 AMD 1 or 2 regularly and can tell whether it works reliably? I am interested in experiences regarding both models, but for now mostly model 1. Of course if someone also uses BTRFS that would be even better.

On my research on the web I concluded that hibernation may work okay meanwhile. But as I do like to avoid any filesystem corruption issues, I'd like to read about more experiences before I make a decision.


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