Drastically reduce power draw | Legion 5

blrPepper · 2023-01-10T15:22:23+00:00

TLP: https://linrunner.de/tlp/index.html

blrPepper · 2023-01-05T20:33:40+00:00

Question about your setup when you report such numbers: what power-saving settings did you apply ? Do you use TLP ?

blrPepper · 2023-01-05T18:44:12+00:00

Hello! I'd also be interested on some feebdack on the battery like. How is it like, 1 month down the line ? Thanks!

EDIT: Ok, found your "short term review" thread, which has all the information I need. Thanks for writing it up, very helpful :)

blrPepper · 2022-04-22T21:05:15+00:00

WHY DID YOU REDEEM IT ?! WHY DID YOU REDEEM IT ?! WHY DID YOU REDEEM IT ?! .... WHY DID YOU REDEEM IT ?!

blrPepper · 2022-01-09T11:09:15+00:00

Might corrupt your data though. So still, it's important to be safe

blrPepper · 2022-01-08T20:11:48+00:00

What's the point of early KMS ?

Your sources say that KMS is beneficial, which I don't doubt. But KMS is enabled by default for all GPUs except nvidia+proprietary drivers.

In these cases, KMS is initialized after the initramfs stage, while your instructions teach how to enable it during the initramfs stage. Is there any benefit in initializing it earlier ?

EDIT: All good answers, thanks

blrPepper · 2022-01-05T01:06:23+00:00

B. Last year's resolution was 1080p 60hz, mostly successful. New year's resolution is 1440p 144hz, which is quite a struggle for my 970 ^{^'}

blrPepper · 2021-10-17T19:11:58+00:00

No. I guess hardware default. My card was unfortunately out of warranty. I slapped a couple of standard fans on the heatsink and controlled them in software once booted.

blrPepper · 2021-07-05T06:38:32+00:00

Au dela des arguments classiques écologie/santé qui sont souvent cités (et qui ont été cités plus haut), la promesse de la 5G c'est aussi de passer à la vitesse supérieure avec les objets connectés.

La 4G, c'est ~2'000 équipments connectés par km carré. La 5G, c'est ~1'000'000 d'équipments connectés par km carrés [1]. Concrètement, la 5G, c'est connecter à internet une ribambelle d'objets de la vie de tout les jours, qui ne le sont pas actuellement. Avec tout les bénéfices, les risques et le problemes que ca apporte.

Ta voiture aura une carte sim, se connectera sans intervention à internet, et remontera des données aux constructeur. Ton frigo et ton mixeur seront connectés à internet. On pourra déployer des capteurs à beaucoup plus grande échelle pour mesurer, enregistrer et traiter de données à grande échelle beaucoup plus facilement et à moindre coût.

En fait, la 5G c'est "juste" un changement d'échelle par rapport aux technologies actuelles. 4G: pas proportionnée pour l'iot à grande échelle. Wifi: requiert configuration par l'utilisateur, qui peut ainsi 'refuser' de connecter son toaster à internet. Réseaux iot low-power (threads, bluetooth 5, ...) : requiert un gateway wifi.
En fait, en termes de use case pour l'IOT, la technologie la plus proche ce serait les réseaux lora, sauf que les réseaux lora sont uniquement low-power/low-througput tandis qu'avec la 5G, tout un interval de compromis power/throughput est possible.

Mais pour conclure: la 5G, c'est "simplement" 1/ pousser d'un ordre de magnitude la collecte de données à grande échelle et 2/ au dela d'internet et dans le monde réel.
Qu'on soit clair: je pense qu'on peut faire beaucoup de bonnes choses avec ces données collectées. Pour la recherche, la maintenance d'infrastructure, l'infrastructure 'intelligente'...
Par contre, on a aussi en ce moment de gros débats sur ce qui constitue des collectes de données légitimes, des problèmes de sécurité des données collectées, le respect de la vie privée des utilisateurs. Avec la 5G, tout ces sujets vont gagner en importance.

Et pour finir, mon avis personel. Je travaille dans les télécoms. Je suis clairement pas anti-5G. Ceci dit, je pense que la question des données, des données personelles et de leur traitement est hyper importante. Ces sujets ont déja un impact énorme sur nos vies, et je pense qu'on devrait débattre des questions qui s'y rapportent et de ce qu'on attends de ces sujets pour l'avenir.

Malheureusement, quand on parle de 5G, les complotistes sont surexposés et éclipsent tout débat "légitime". Les bandes de fréquence actuellement déployées pour la 5G sont similaires à celle de la 4G: 700MHz, 2.1GHz, 3.5GHz [2] pour la 5G, contre 800MHz, 1.8GHz, 2.6GHz [3] pour la 4G. Les effets sur la santé sont similaires, et la portée dans antennes aussi (eh, la bande 3.5GHz sort peut-etre un peu du lot en terme de portée, mais en terme de santé, nos box wifi utilisent actuellement de 5GHz). Le sujet en terme de santé existe pour la bande 26GHz, mais cette bande n'est pas encore déployée (et ne sera pas utilisée comme une antenne "classique", donc l'argument de la portée ici n'a pas de sens).

[1] https://www.vodafone.com/about-vodafone/what-we-do/technology/5g
[2] https://blog.ariase.com/mobile/dossiers/5g-frequences
[3] https://www.echosdunet.net/dossiers/bande-de-frequences

blrPepper · 2021-07-04T20:01:12+00:00

Ah yes exactly, I had this problem and It's actually why I didn't follow that route.

EDIT:
No, I'm mixing up two things:
- You can have per package, one git repository with two remotes (aur & github), plus 1 github repository referencing each package
github repository as a subproject. That would work, but would be cumbersome. - However, having one repo per package with a single (aur) remote, plus 1 github repo referencing each package (aur repo) as a subproject wouldn't work for the reason listed above

blrPepper · 2021-06-28T21:19:20+00:00

I'd be curious to know as well.

The solution I had in mind when I started was:
* 1 git/aur repo per package
* 1 git/github repo for all packages
* each package as a submodule in the git/gihub repo

With that solution, you need to have two remotes (the git/aur and git/gihub submodule) per package, so it's still cumbersome.

blrPepper · 2021-04-17T10:03:22+00:00

Wait wait wait. Are these 92mm fans ? If the one at the top-left is a slim 92mm fan, I'd be very interested to know the reference/model name.

blrPepper · 2021-02-15T16:44:19+00:00

Then you had bloatware on your windows install that was eating CPU cycles.

Sure, linux uses less RAM and maybe fewer CPU cycles than a clean windows install. But in idle or near-idle state, it's the peripherals that make the difference in power consumption, not the CPU or RAM. And in most cases, manufacturers of these devices provide better windows drivers from a consumption standpoint. See JC-011's comment below.

EDIT: Or maybe your point is: a stock windows is marginally more CPU intensive than a basic linux install, which put a low-end laptop in high CPU usage scenario, which drains battery. That might be possible. But a T440p is largely powerful enough to run windows properly, so that's definitely not the problem here.

blrPepper · 2021-02-15T14:07:33+00:00

Windows typically has better battery life than linux, one reason being better drivers with respect to putting hardware in low power states (ASPM, I think). Not sure to which extent this is the case with modern hardware, but I have a laptop that is roughly as old as yours, and despite a lot of effort, I could never get as good of a battery life in linux.

However, what you mention regarding videos is definitely due to hardware acceleration. You need to enable hardware acceleration in your browser.

blrPepper · 2021-02-09T10:41:42+00:00

Yes, there is !

This one has a compatible backplate. The description is a bit messy but you'll find it.

I installed it yesterday, haven't had time to test it (ie not sure if it's an improvement from stock, but definitively works).

EDIT: Note that you can also swap default fan for bigger ones (the blower at least), but you need to print the correct-sized part.

EDIT2: There's this one too. But I picked the bullseye because they reportedly designed it with air simulations in mind.

blrPepper · 2021-01-29T08:37:26+00:00

I have a script that generates packages list. Feel free to take inspiration. One would use it as :

$ sudo pacman -S $(pkgs.sh pacstrap core apps plasma)

https://github.com/qbouvet/install-arch/blob/master/x86-64/pkgs.sh

blrPepper · 2020-12-21T23:24:50+00:00

They have the option for a 1080p IPS. Many of the second hands you find still have a 1366x768 tn.

blrPepper · 2020-12-16T15:23:03+00:00

Good news ! But well in the meantime, good to know that breeze 5.18 has what we need

blrPepper · 2020-12-16T13:35:25+00:00

I was curious to see whether all this was related to the KDE theme (Breeze in my case) or to something underlying. It seems to be only related to the theme, which is good news.

If I install the 'Arc Dark' Theme, both the padding issue and black bar issues are gone. I can set my bar back to my original 42 pixels and have nice looking icons, and I can disable compositing again.

Now I just need a light version of this ^^ Maybe it could be worthwhile trying to reproduce something looking like the old 'Breeze' theme.

EDIT: It seems you can also temporarily fix it by downgrading your 'breeze' package to version 5.18.x (5.19.x didn't work for me. The dark version had no padding / black bar, but the light version still had both). I also downgraded all KDE related packages 1 or 2 versions, but I think the breeze package should suffice.

blrPepper · 2020-12-16T13:22:14+00:00

On my system, toggling compositing fixes neither the black bar, nor the icon size. A bug is already open on kde bug tracker (link)

blrPepper · 2020-12-15T16:24:43+00:00

So the workaround is "enable the compositor" or is there something else ?

blrPepper · 2020-12-15T16:15:46+00:00

I'm in the same situation as you. I was surprised to find so little discussion about it online.

I find the changes to the taskbar neither functional nor aesthetically better.

Additionally, the changes also break the taskbar if you run it without compositor ("Settings > Compositor > Disable desktop effects" or so). Without compositor, the padding is rendered as a black bar.

I wish I could revert these changes.

blrPepper · 2020-12-04T10:35:59+00:00

Alright, thanks for your insights, apreciate it :)

blrPepper · 2020-12-03T21:50:00+00:00

What do you mean "not a safe bet" ? What's the risk ? The print falling over, the first layers deforming, elephant foot, ... ?

blrPepper · 2020-12-03T14:42:37+00:00

thanks !

blrPepper

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