I am just joining the show, slowly migrating everything from my de-Googled Cosmo Communicator to the Librem 5.
I found out that sometimes my phone would get very hot when charging. Investigating the issue, I found out that the issue only happened with the Lenovo USB C charger that I have at home (model 01FR28 65W).
Digging a bit deeper, I found out that this charger gets the Librem 5 using 100% CPU, and this is why actually the phone gets hot. If I use my desktop USB C port or the provided charger, it’s all good.
Your charger is giving the phone too much power it’s 65w…it’s a super fast charger. I don’t think the L5 battery I capable of that. If you continue. You will explode your battery or the phone
Why do I get high CPU usage in these processes using the Lenovo charger and not with the standard charger?
In any case, I’ve stopped using the charger… I was just trying to find out the root cause of the problem. The phone SEEMS to be charging at the correct speed - I will add a kill-a-watt to the wall at some point to confirm.
All right, I did some investigation and I am tempted to blame the charger (as my Cosmo Communicator also gets way warmer charging with the Lenovo charger compared to the Purism charger).
Here is the loop that I found in the logs when I connect charger (journalctl):
bq25890-charger Upstream supply changed: 1, then disabling OTG_EN pin.
New usb device found, idvendor=1d6b, idproduct 002, etc
It’s not actually a new USB device, but rather the controller repeatedly switching between host and device mode for some reason. Perhaps the charger does not handle data role signalling correctly.
I confirm. The same problem happened for me with another Lenovo charger, model ADLX65YLC3D.
Feb 28 07:34:24 pureos kernel: bq25890-charger 3-006a: Upstream supply changed: 1.
Feb 28 07:34:24 pureos kernel: bq25890-charger 3-006a: Disabling OTG_EN pin
Operating systems are funny.
Here is some off-topic: Now I can’t find all the wifi AP’s with my Win10 laptop, after I cleaned it with Privatezilla. But Wifi works with both 2.4GHz and 5GHz AP’s. It is just some random AP’s (about 70% of them) that are not getting listed. I guess I need to install Debian for this laptop too.