Questions tagged [acpi]
ACPI (Advanced Configuration and Power Interface) is a standard for power management.
295 questions
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System wakes from sleep when freezing user processes
My system was sleeping and resuming just fine, but for a few months, the system wakes itself after going to sleep.
I looked with dmidecode at the 'Wake-up Type' and it says PCI PME#. Then I searched a ...
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Disable wakeup on plugging in USB-C power
On my Lenovo Thinkpad T14s with AMD CPU, when the machine is suspended, plugging the USB-C power cable in or out causes the machine to wake up. I want to disable that.
Some information I think is ...
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Unpredictable freezing with Debian 12 on Dell Latitude 7490
I'm having freezing problems with my Debian 12 install on a Dell Latitude 7490 laptop.
The screen will freeze and become unresponsive. Moving the mouse during the freeze will cause the keyboard ...
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Dell Latitude 5420 S0iX Sleep
I just purchased this laptop used and installed Fedora 42 on it.
It’s a Dell Latitude 5420 with an i5-1145G7 processor.
The laptop does not support S3 sleep, only s2idle. It successfully enters and ...
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How to debug which one is causing AE_AML_NO_RETURN_VALUE?
I have a problem with ACPI event in Linux. rtcwake is not working because alarm was not handled by kernel. This is the snippet of dmesg output:
[ 1.102322] ACPI Error: Result stack is empty! State=...
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System taking more time to resume from S3 sleep
Yocto System taking more time to resume from S3 sleep, it should take 2sec, but taking 12sec:
Suspend entry: [ 244.086061] PM: suspend entry (deep) Low-level resume complete: [ 246.900251] Suspend ...
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Manjaro (KDE) does not detect unplugging of AC adapter when booted while plugged
This was run while unplugged
➜ ~ upower -i /org/freedesktop/UPower/devices/line_power_AC
native-path: AC
power supply: yes
updated: Sa 10 Mai 2025 11:06:43 CEST (...
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acpitool -S: solution to problem of a laptop that won't hibernate properly?
I have been struggling for over a month with a new Lenovo Thinkpad P16 Gen2 laptop running Ubuntu 22.04 LTS, that would not successfully suspend. Maybe 90% of the time it worked okay, the other 10% ...
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acpitool -W fails to disable the wake-up capability of process labeled PXSX
I am trying to enable hibernation on a laptop because suspend is too undependable. I have gotten the hibernate command to turn the computer off but it starts back up immediately in something like a ...
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Arch freezes when watching video: "refused to change power state" in logs
This doesn't happen every time, but sometimes when watching a video, my computer seems to (almost) freeze. The screen changes every few seconds or so. Rebooting fixes the issue until the next time it ...
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How can I enable support for the HMAT table?
I have access to a server and want to check its HMAT table.
However, the HMAT table is not present (the SRAT and SLIT are though).
I checked the Linux kernel config and the HMAT is enabled (...
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What does the ACPI docs about NUMA nodes mean by "dynamic migration"?
With reference to the following section of the ACPI docs about NUMA nodes: https://drops.dagstuhl.de/storage/01oasics/oasics-vol116-parma-ditam2024/OASIcs.PARMA-DITAM.2024.3/OASIcs.PARMA-DITAM.2024.3....
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Does the SRAT show offline memory?
I'm reading this section of the ACPI documentation on the SRAT: https://uefi.org/htmlspecs/ACPI_Spec_6_4_html/17_NUMA_Architecture_Platforms/NUMA_Architecture_Platforms.html#system-resource-affinity-...
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Suspend issues: laptop lid close wakes up system from suspension (s2idle)
I am currently struggling with an issue on a new Lenovo IdeaPad 9 (AMD) laptop (16AHP9)
Problem is that when I suspend the system and then I close the lid, the system wakes up immediately. If I keep ...
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Linux Laptop won't hibernate, LVM on LUKS FDE but everything configured OK?
My Linux laptop (openSUSE Tumbleweed) should hibernate but won't and I do not understand why. I have had similar systems (Arch Linux) hibernate under the same circumstances (LVM on LUKS). Here is my ...
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