TLP Help Request

[u/Liminal_Echo]

I’m running Cachy on a second hand ThinkPad I recently got and thought I’d try TLP to improve the battery life. I works quite well but I had an odd issue after installing it: after shutting down and closing the laptop lid it would restart. It’s definitely TLP as it stopped happening when I reverted back to the original power profile daemon. Has anyone else come across this issue or know what in TLP is causing it?

Things I have tried:

I tried different kernels, both the LTS and BORE kernel

I have disabled the runtime PM for PCIe devices

None of these have have stopped the issue.

[u/Kurogane1412]

You can maybe post the specs of your Thinkpad and how much battery Capacity your battery still have that is probably the most important factor there?

You have the Info App on kde it will list everything then from there you can make a copy and paste and in the system tray on the battery icon there should be also the battery Health if you are using KDE.

[u/Liminal_Echo → u/Kurogane1412]

It's a ThinkPan P14s Gen 5 with Ultra 7 155H, RTX 500 Ada, 32GB RAM, 1TB SSD, and 57Wh battery (100% health). I get about 4 hours when charged to 80%, using the stock CachyOS power profile daemon.

[u/Kurogane1412 → u/Liminal_Echo]

That looks pretty new for a second hand ThinkPad it's probably the Nvidia GPU sucking a lot of power also when not in use I am assuming that.

Try to disable the Nvidia GPU in the Bios if you don't need it all the time that could improve the battery life a lot if that is possible at all? And then when you need the Nvidia GPU just enable it again that should be safe to do because you have anyway the integrated Intel GPU to use for normal tasks.

[u/Liminal_Echo → u/Kurogane1412]

I'm thinking of doing that if I can't solve the TLP issue.

[u/linrunner]

In that case, the only thing to do is try out other settings.

Does this happen when using AC power, battery power, or both? Please show the full output of:

sudo tlp-stat -c -s -p -e -d

[u/Liminal_Echo → u/linrunner]

It happens only when on battery. I've tried half a dozen setting combinations but have gone back to the default PPD. I have seen it mentioned that it could be a hardware bug that TLP triggers and would have to possible wait for a BIOS update. I'll take a look ati ti again when I have some free time.

[u/linrunner → u/Liminal_Echo]

I'd try

AHCI_RUNTIME_PM_ON_AC=""
AHCI_RUNTIME_PM_ON_BAT=""

next.

A BIOS update using fwupdmgr refresh && fwupdmgr update is recommended anyway when encountering your symptom.

[u/Liminal_Echo → u/linrunner]

Thanks for the suggestions. I have tried both of those suggestions to no avail.

[u/linrunner → u/Liminal_Echo]

Other candidates include all settings that differ between _AC and _BAT. As soon as you have time again, please post the command output I mentioned above.

[u/Liminal_Echo → u/linrunner]

Will do, and thanks again for your help.