Hm, for me enabling the EPP driver, either manually or using the PPD patches seems to sometimes cause AMD CPU stuck in low-speed state after system resume. I can temporarily get out of that state by toggling the power profile and it also seems to randomly unstick itself, but I do think something isn’t quite right with EPP and as such those patches might cause performance regressions for some users? Anyone else experienced their CPU getting stuck at 544Mhz with those patches after suspend sometimes?
Will do. When it’s next slow, what’s the best way to get you the results? Also, I see it runs suspend cycles and then awakens. Can I tell the script to suspend and not immediately wake up?
Hey! A quick update from me: I switched to Fedora 39 with PPD installed from Mario’s COPR. My minimum brightness idle power is now 3.5W and max brightness is 6W. So much better!
I’m not sure what Fedora is doing differently to Debian, maybe it’s something in the kernel to do with the EC communication. I was not able to achieve these results on Debian with PPD or TLP.
Don’t know exactly what happened but going from kernel 6.5.11 to kernel 6.6.11 made my power usage go from 4W to 7.5W idle as if I didn’t install Mario’s COPR. I did try a reinstall of Mario’s COPR but it didn’t do anything. Anyone got a clue what I could check to see what might be goofy? New to fedora.
Leaving this up for others who jump the gun. Make sure you check that you didn’t inadvertently turn off power saver in the settings when testing and forgot to turn it back on lol. Sorry squad
What’s the current recommendation then? There was a lot done, some patches made it to the kernel, is TLP still not recommended with kernel 6.7+ ?
Are there still “major issues” such as the suspend keyboard wake? I’m using TLP currently on Arch with kernel 6.7.3. My usage on fairly high brightness with firefox (as I type this) and a few chat apps (element, 64base-telegram) + oss-code (vscode/electron) is around 5-6W.
Video playback on firefox even with forcing hw accelleration still seems to kill it quickly tho it goes up to 25W+
EDITED AFTER RE-TESTING
I seem to get similar results with TLP and PPD (the patched one) on Arch 6.7
Idle with PPD and power-saver gives me around ~3.7W on lowest brigthness simillar to TLP with a bunch of apps + firefox up (but idle).
My setup is set to use suspend for 5 minutes followed by hibernation which both makes it safer (full disk encryption) and saves me the suspend-drains-battery problem. I’m pretty sure there are still issues tho. Also my measurements were mostly short term.
I just followed this guide for hibernation in general and then from this guide you’ll want to change HandleLidSwitch (and others) in the /etc/systemd/logind.conf to suspend-then-hibernate. Make sure to also change your HibernateDelaySec value to something too unless you want to hibernate only on <5% battery.
This all also requires the fixes to “autowakup” with the AMD framework, namely rtc_cmos.use_acpi_alarm=1 on the cmdline, otherwise your laptop might just wake up in the middle and eat the battery. (this should get fixed by kernel 6.9 I believe)
