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 | 1 | initial version | posted 2014-03-20 17:14:26 +0200 |
(bug?) jolla in charge mode fails to negotiate >500mA from USB pc controller
hi, I have Jolla USB setting set to charge only.
At home I use chargers plugged into 220V, outputting 5V and at least 1A.
At work I connect jolla to the pc, but I noticed it charges slower than at home. Using hunger Meter app as benchmark for a week I am pretty sure that at home Jolla charges at 1A while at work it charges at 500mA.
Jolla fails to talk to the USB host of the PC to ask for higher current (1A), a feature described in USB 2.0 specs. Even if in charge only Jolla should negotiate with the USB controller an higher current draw. Talking to USB controller is different than "talking" to the OS and transform the usb connection into a PC connection. The tw things should be different.
| | 2 | No.2 Revision |
(bug?) jolla in charge mode fails to negotiate >500mA from USB pc controller
hi, I have Jolla USB setting set to charge only.
At home I use chargers plugged into 220V, outputting 5V and at least 1A.
At work I connect jolla to the pc, but I noticed it charges slower than at home. Using hunger Meter app as benchmark for a week I am pretty sure that at home Jolla charges at 1A while at work it charges at 500mA.
Jolla fails to talk to the USB host of the PC to ask for higher current (1A), a feature described in USB 2.0 specs.
Even if in charge only Jolla should negotiate with the USB controller an higher current draw. Talking to USB controller is different than "talking" to the OS and transform the usb connection into a PC connection. The tw two things should be different.
| | 3 | retagged |
(bug?) jolla in charge mode fails to negotiate >500mA from USB pc controller
hi, I have Jolla USB setting set to charge only.
At home I use chargers plugged into 220V, outputting 5V and at least 1A.
At work I connect jolla to the pc, but I noticed it charges slower than at home. Using hunger Meter app as benchmark for a week I am pretty sure that at home Jolla charges at 1A while at work it charges at 500mA.
Jolla fails to talk to the USB host of the PC to ask for higher current (1A), a feature described in USB 2.0 specs. Even if in charge only Jolla should negotiate with the USB controller an higher current draw. Talking to USB controller is different than "talking" to the OS and transform the usb connection into a PC connection. The two things should be different.