this post was submitted on 16 Jul 2025
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holup - you shut down the laptop and in such a state it drains the battery?! I mean, that's so outside of the OS' functionality, it don't matter which one you got. the only sensible conclusion is that shutting down the laptop in debian doesn't turn it off, there are no other explanations.
fedora is more modern by way of kernels and DEs and whatnot, but I've looked up your hardware, that's an 8th gen i5/i7, that's plently supported even in old bookworm.
one thing to lookup is in BIOS, my T480s (same generation) had a power management setting in BIOS that was either Windows or Linux, so make sure yours is set correctly.
edit: to add, the other issue, standby, blows on any hardware I've tried so what you need to do is implement
suspend-then-hibernateby setting up a swap file that's RAM + 4 GB (or RAM * 1.5, if you run zram) and then enabling first hibernation and then configuring suspend-then-hibernate. so in that setup, your laptop sleeps normally, and if you don't touch it in say an hour, it dumps the RAM to the SSD and powers off. when you power it on, it restores from swap and that's faster than cold boot and your shit is how you left it.naturally, alla that's pointless until you fix issue #1, the drain when it's supposedly off.
OK, a little bit of an update. I booted into the fedora live USB disk. I then shut down from there. A day later, and the battery is still on 98%. This shows that it is actually debian causing the issue, not a system issue like the BIOS or similar. Now, just to try and figure out what it is with Debian and shutdown.
Thank you for your response. I very much appreciate it.
I will definitely try whatever I can first before creating a bit of a workaround of suspend then hibernate. What I really want is just for the laptop to shut down properly, so that when it boots it still has the same, or very similar amount of battery.
My BIOS settings are definitely correct, I've gone over and triple checked them. Wake on land and all of those kind of things are turned off as well. I am fully stumped.
not familiar with the usability issues that you need X11 for, but fedora has spins for xfce, cinnamon, etc. that are gonna keep X11 around for a long time.
I mean, there are other explanations, like having Wake on Lan activated. But yeah it is very suspicious. It shouldn't drain that fast, even with WoL.
OK, a little bit of an update. I booted into the fedora live USB disk. I then shut down from there. A day later, and the battery is still on 98%. This shows that it is actually debian causing the issue, not a system issue like the BIOS or similar. Now, just to try and figure out what it is with Debian and shutdown.
Yes, I have checked all those settings in the BIOS, and they are fine. I have no idea where to go now.