08-18-2017, 09:10 PM
(This post was last modified: 08-19-2017, 04:46 PM by moravecz.
Edit Reason: clarify OS being used
)
(08-17-2017, 04:52 AM)MarkHaysHarris777 Wrote: Basically, on the production boards they tied the usb power through regulators; two GPIO lines must be toggled to set the regulator or the usb power drops. For some reason the gpio mux lines controlling the regulators are left floating; not good.
There are two ways to fix it: 1) dts|dtb , or script , to toggle the mux lines turning the regulators ON, or 2) mod the board so that the regulators are ON all the time !
The regulators are on the schematic on page 19; We'll do some testing and see if we can get a software fix; otherwise, we'll put up a board mod procedure.
I have an additional bit of information. If you open the 'PulseAudio Volume Control' window in Debian LXDE Build 20170809, this seems to immediately kill the USB ports. After getting the USB keyboard and mouse working, everything was good until I opened the PulseAudio Volume Control window. Then the keyboard and mouse were suddenly dead. This happened twice.
I assume this is related to the above issue regarding the gpio mux lines are left floating?