Third Party Charging Bricks (Mostly Anker) Show Up As Slow Chargers on Steam Deck OLED

[PeeJaySpear]

Title says it all. A lot of third party charging bricks are detected as slow chargers in SteamOS for the SD OLED. My Anker 100 watt charger had no issues with my LCD Steam deck but keeps registering as a slow charger for the Steam deck OLED. I have seen other users with this issue and the fix appears to be to plug the wire into the Steam deck first and then the brick and you should get it to detect as a fast charger after the first time or few times you try this. Is this something that can be fixed in an update?

[Prezidentas]

honestly you need to verify the actual power... it's possible that it's showing as slow even though it's charging at full speed

[Prezidentas]

you are using a C to C cable, right?

[plexus]

On my 120w Anker power supply I've been able to get the steam deck OLED to reliably fast charge only when I'm also drawing power to charge another device (the charger has two USB C ports and a USB A port). Typically I plug the other device in first, then the steam deck, after which I can unplug the second device if I want and it will keep fast charging.

[plexus]

I'm guessing when it first plugs in and negotiates power delivery, Anker is offering a voltage that is too high so it just plays it safe and negotiates for a low voltage instead. But with another device in play Anker can't offer as high and the steamdeck can then properly negotiate for the voltage it needs.

[Prezidentas]

Originally posted by plexus:

I'm guessing when it first plugs in and negotiates power delivery, Anker is offering a voltage that is too high so it just plays it safe and negotiates for a low voltage instead. But with another device in play Anker can't offer as high and the steamdeck can then properly negotiate for the voltage it needs.

your assumption is not correct. PD offers all possible capabilities at once, and then the devices chooses one of those.

[GandalfBaltasar]

The damn software bugs caused these problems. My 65 watt charger (Anker 735) charges my LCD deck, which by the way crashes all the time (check installation) and already the second deck after an RMA process crashes, also thanks to software bugs. My OLED works works perfectly and doesn't crash, but the Anker 735 only charges slowly. The latest chargers work with the LCD deck but don't work correctly with the OLED. I charge my OLED with these two power supplies without any problems. https://amzn.eu/d/5kGAg1G https://amzn.eu/d/jfwLj5G Greetings

[afty]

I'm seeing the same issue with my Steam Deck OLED and Anker 735 charger (65W). With a USB-C power meter, I can see that the Deck is only charging at ~14W (14.9V * 0.92A). With any other charger I own (the one that came with the Deck, an Apple 100W one, an Amazon Basics 65W one) it charges at ~42W (14.7-14.9V * 2.88A), using the same cable. I've tried 3 different cables as well, and all have this problem.

I found that if I hold (...) and volume down while it's plugged into the Anker charger, it will renegotiate PD and begin charging at full power (~42W).

[Prezidentas]

you would need a USB multimeter that is capable of capturing USB PD packets (like FNB58) to see what is actually happening.