Computer: HP ProDesk 600 G1 DM (mini desktop). Windows 7-64 SP1
4 USB2 in the back and 2 USB3 in the front. I bought two 4-port USB3 hubs that have their own power supplies. When I connect the hubs to the back USB2 ports everything seems to work fine - devices plugged into the hub (each port has its own power button) always stay connected to the computer.
If I move the hubs to the front USB3 ports it seems whatever is connected to the hubs keeps falling asleep. When I say falls asleep, what appears is happening is the computer still sees the devices connected to the hub but the computer can't communicate with the device.
This is most prevalent with a few test phones I have connected to the hub - as I compile new app code and deploy it to the phones the Android
adb just loses communication with the devices. I have to manually disconnect each phone and re-connect to the usb cable. When I unplug, the computer makes that "disconnected" tone and when I reconnect it makes the "connected" tone and everything works again. But 10 minutes later it all happens again. Its quite annoying.
For now I am reconnecting the hub back to the USB2 ports. But this "falling asleep" issue, if I recall correctly, seems to have been going on for sometime as I used to have 1TB external SATA drives connected to each USB3 port - and I would notice from time to time the drives were showing disconnected or it was connected but the drive couldn't be accessed until I disco'd and reconnected again.
I have checked power settings and disabled
USB selective suspend and also verified that all power settings are disabled in Device Manager. Aside from thinking these USB3 ports are bad - I can't think of what else to look at or check.
Two 2TB seagate HDD USB3 drives: Win7-64 desktop: do not work on any usb2 or usb3 port, do not work on hub. However, these drives did work at one point as they were routinely backing up my desktop Win10 laptop: drives work just fine on USB2 and USB3 ports
Two USB3 Powered HUBS: Win7-64 desktop: works on both USB2 and USB3 ports, problems with devices being randomly being disconnected Win10 laptop: works just fine on both USB2 and USB3 ports.
Other devices: Test Phones (2 diff Samsung, 1 Motorolla): all work connected to USB2 and USB3 ports, as well as work via the USB3 Hubs - however disconnects keep happening when USB hub is connected to USB3 port.
This is frustrating....beginning to think its a power problem with both USB3 ports on the desktop....but then the HDDs are not working connected to the USB2 (but that makes sense because the USB2 might not be sending enough power to the HDD). However, I plugged the HDD into the powered Hub that was connected to a USB2 and the HDD still did not work/get recognized.
I am baffled.