Display "Idle to On" transition resets USB Hub

Hi all,

I have been pulling my hair lately with a issue I am experiencing with the Spectrum… :frowning:

I love the idea of using 1 cable from my laptop to the monitor and use the built in USB hub to keep USB to Eth and other stuff in the back… this way, all cables are behind the monitor and I end up with a clean desk environment :slight_smile:

The issue is that once the display exits from IDLE to ON, it resets the USB hub and my USB Ethernet card is disconnected/connected and all my SSH sessions are dropped (along with all other ongoing internet connections).

I have upgraded to v104 and enabled the option found in:
Input/Output > USB Hub > Always On but the issue still happens.
Here is a guide to reproduce the problem:

Test Environment:

  1. Eve Spectrum with v104 loaded
  2. LGgram 16Z90P i7-1165G7

Test methodology:

  1. Connect the laptop to the Spectrum using USB C cable
  2. In the OS options “Power Options”, set “Turn Off Display” to “1 min” and “Put Computer to sleep” to “Never

Expected result:

  1. After 1min the display is turned off (soft off)
  2. USB hub is still powered on
  3. A key is pressed
  4. Display turns on

Observed result:

  1. After 1min the display is turned off (the Xe driver stops sending display signal to the Spectrum)
  2. After 1min more, the Spectrum shows “No signal” and powers off (soft off?)
  3. The USB hub is still ON (good) and all SSH sessions are running fine, the display is off (good)
  4. Press a keyb button or move the mouse
  5. The monitor is turning on
  6. Immediately the sound of USB disconnect/connect is heard
  7. I can see that am not connected to internet for 1-2 seconds (USB Ethernet interface coming up?)
  8. All my SSH sessions and ongoing downloads drop
  9. Connected again

What is strange is that the USB hub is reset not when the display enters IDLE mode or soft-off but when it is turning on again.

Another way to reproduce the same behaviour (although software and hardware-wise this methodology might be different) is simple to use the physical button to power the Spectrum off (the hub will remain on), then power it on (the hub will reset).

Thanks,
ER

4 Likes

That part that you mention in your Observed results, step 6 - I don’t actually keep anything connected to the Hub as I’m on a desktop, but if I already have my headphones powered on and receiving a signal from my PC, I, too, hear that exact sound.

Let me test on my end, I’m on 104 also, but I suspect your behavior is exactly what I’m gonna see also.

3 Likes

I’ve noticed similar behaviour. My mouse and keyboard have RGB lighting, and I can see the lighting turn off and back on again when the Spectrum wakes from sleep.

Hopefully this and the USB auto-selection bug I reported will get fixed in a future update.

4 Likes

This explains the problem I’m having here USB Hub appears to disconnect drives when monitor sleeps - when my Mac wakes it must disable the hub for a second which is ejecting the USB SSD.

1 Like

I have also observed this issue, with the USB hub appearing to reset upon wake from standby. I also observe USB disconnect sounds very occasionally while idle. Should note I have the USB hub set to remain powered when in standby.

2 Likes

Hi, @ERodrigues!

We appreciate that you documented in detail the behavior of USB hub disconnection when waking up from standby. Also, it is nice to hear about the observation from fellow community members. This phenomenon on our list for investigation later down the line.

2 Likes

How much later down the line? It has forced me to stop using Spectrum’s USB altogether.

Unfortunately, we cannot estimate the time it takes due to the complexity of resources involved in investigating, implementing, and testing such an improvement.

While not wanting to commit you to an outcome, I’d be happy with “looking at it in the next week or month” vs “best guess is several months out because we have a number of other things to focus on first.”

1 Like

Sure. Several months is probably closer to the outcome.