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   Rich Felker (dalias@hachyderm.io)'s status on Tuesday, 24-Dec-2024 22:23:00 JST Rich Felker

   OK, I'm loving having a laptop with USB C power supply. Most power banks won't *charge it*, at least not with power on, but they will run it in "not charging" state very well, with basically no drain on internal battery. 😲

   • Embed this notice
     Rich Felker (dalias@hachyderm.io)'s status on Tuesday, 24-Dec-2024 22:34:11 JST Rich Felker

     in reply to

     • neocturne

     @neocturne Uhg, that sounds awful. I could use A-to-C cables from the power banks tho if that happened. They never take input on USB A; only C is bidirectional.

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     neocturne (neocturne@chaos.social)'s status on Tuesday, 24-Dec-2024 22:34:12 JST neocturne

     in reply to

     @dalias I've had mixed results with that... my previous Thinkpad would always charge the power bank and not the other way around. With my Framework, it seems to be decided at random in which direction to charge each time I connect the power bank... (but at at least I still have some hope that a fix might be possible in the EC firmware)

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     Wanja (muvlon@hachyderm.io)'s status on Tuesday, 24-Dec-2024 22:40:44 JST Wanja

     in reply to

     @dalias Yup, and some power banks absolutely do charge it! I have a 100W/20V PD power bank that does the job. It can also run a pinecil at full power which is very nice.

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     Howard Chu @ Symas (hyc@mastodon.social)'s status on Wednesday, 25-Dec-2024 00:47:31 JST Howard Chu @ Symas

     in reply to

     @dalias they do alright. But they won't charge a laptop that shutdown due to a fully drained battery. (He says, after a recent power outage...) The machine needs enough juice to negotiate with the USB-PD charger before the charger will send any power.

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     Rich Felker (dalias@hachyderm.io)'s status on Wednesday, 25-Dec-2024 00:47:31 JST Rich Felker

     in reply to

     • Howard Chu @ Symas

     @hyc But then how does the AC adapter work when it also needs to negotiate USB-PD? 🤔

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     Rich Felker (dalias@hachyderm.io)'s status on Wednesday, 25-Dec-2024 00:51:14 JST Rich Felker

     in reply to

     • Howard Chu @ Symas

     @hyc I would think it could charge, albeit very slowly, from the unnegotiated 5V present on the USB power lines, then switch once it has enough power to negotiate. As long as the charging circuit is capable of accepting 5V and boosting it to cell pack level.

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     Howard Chu @ Symas (hyc@mastodon.social)'s status on Wednesday, 25-Dec-2024 00:51:15 JST Howard Chu @ Symas

     in reply to

     @dalias maybe it has a default fallback? I had to dig up my OEM charger to bring the thing back to life. (Lenovo Legion7). That has its own plug, separate from the USB PD port.

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     Rich Felker (dalias@hachyderm.io)'s status on Wednesday, 25-Dec-2024 00:56:41 JST Rich Felker

     in reply to

     • Howard Chu @ Symas

     @hyc In fact I've noticed various devices seem to behave this way when fully drained: taking hours to charge up enough to show that anything is happening. And I assume this is from just accepting the baseline low-current 5V USB because they're unable to power up enough to negotiate. Which seem stupid since they could let the negotiating circuit run off the 5V pulling <10mA.

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     Rich Felker (dalias@hachyderm.io)'s status on Wednesday, 25-Dec-2024 01:00:09 JST Rich Felker

     in reply to

     • Howard Chu @ Symas

     @hyc Some chargers (especially power banks) don't provide an unnegotiated 5V charge to avoid draining while idle. I don't know exactly how they work, but if you plug in a device that wants that (like some cheap toys), it'll only charge for a few seconds, then turn off. 🤦

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     Howard Chu @ Symas (hyc@mastodon.social)'s status on Wednesday, 25-Dec-2024 01:00:10 JST Howard Chu @ Symas

     in reply to

     @dalias hmmm, maybe. Well, my USB charger has a display for each output and it was showing zero, so I don't think waiting for a slow charge would've made any difference.

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     Rich Felker (dalias@hachyderm.io)'s status on Wednesday, 25-Dec-2024 01:13:00 JST Rich Felker

     in reply to

     • Howard Chu @ Symas

     @hyc A hack to get some of these to work is to plug something else into one of the other output ports. If they're single-output-voltage, having both plugged in will force everything to 5V, and the device that negotiated it will keep the other port live and charging. 🤪