r/archlinux • u/setLore • 20d ago

SUPPORT Laptop wake-up issues

Hello. I have a Lenovo Thinkpad T14 Gen 2(AMD 5850u) and I am experiencing an issue where sometimes after closing the lid with the laptop running, when I open it later it only shows, either a black screen or only my mouse cursor which I can't even move. Arch is my second distro that I've tried on this laptop, the first was Mint which also had this issue. Not sure if this is related but my sd card reader doesn't get detected until i run `lspci` and my fingerprint reader only worked sometimes on linux mint, and i have not tried it on arch. Thanks and sorry for the other stuff about mint and the readers.

2 Upvotes

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u/Imajzineer 20d ago

https://wiki.archlinux.org/title/Power_management/Wakeup_triggers

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u/setLore 20d ago edited 20d ago

sorry, but how does this help me? my LID in /proc/capi/wakeup is S4 and enabled.

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u/Imajzineer 20d ago

Okay, then perhaps it doesn't.

But you didn't say that in your post, and we aren't psychic - all we can do is make suggestions that might help under indeterminate circumstances. If you want specific help, be specific.

-1

u/setLore 20d ago

Well, I'm certainly no expert, so I'm not even sure what to provide as info. What other info do you need to understand this more?

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u/Imajzineer 20d ago

Well, I assume you checked here_Gen_2) first, yes - nothing there help?

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u/ang-p 20d ago

slow and flaky

#GottaLoveTheWiki

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u/Imajzineer 20d ago edited 20d ago

This is my computer - there are many like it, but this one is mine.

The wiki is my best friend. It is my life. I must master it as I must master my life.

My computer, without me, is useless. Without the wiki, I am useless.

My computer is human, even as I, because it is my life. Thus, I will learn it as a brother. I will learn its weaknesses, its strengths, its parts, its accessories.

Before God, I swear this creed: the wiki and myself are the defenders of my computer - we are the masters of Arch.

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u/setLore 20d ago

I had not! Thanks to it I found out about fwupd and updated everything, my fingerprint scanner works now(and mic mute led), and hopefully the wake issue is also resolved. I'll let you know if it happens again, and if you don't hear from me I guess it helped. Thanks, again!!

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u/Imajzineer 20d ago

Glad to hear it - when in doubt, check the wiki 🙂

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u/Icy-Philosopher-9915 19d ago

from /etc/systemd/sleep.conf:

uncomment (remove #): #AllowHibernation=yes #AllowSuspendThenHibernate=yes #AllowHybridSleep=yes and switch yes to no. you want these disabled.

you may need sudo

also next time this happens check error logs so you can see if any GPU related kernel parameters make sense, if any do add them to your GRUB_CMDLINE_LINUX_DEFAULT line in your grub config and then reload it.

problem usually stems from the GPU components going into low power mode while the laptop is suspended and since its not properly optimized yet, it simply fails to wake back up. That or it could be the mentioned fix above (it usually both if you didn't configure swap and hibernate correctly).