I flashed the USB firmware “06A4 / 0A.89.18.02” as the release notes mentioned important improvements:
Improved video signal compatibility over USB Type-C
Improved power delivery compatibility over USB Type-C
After the upgrade and reboot of the Spectrum, I now may see a waning message from the LG Power Management app: TEST METHODOLODY A:
Power on Spectrum
Power on the laptop
Connect the USB C cable to laptop
Check image on Spectrum
TEST METHODOLODY B:
Spectrum powered off
Laptop powered on
Connect the USB C cable
Observe that battery is not charging (Spectrum is off, this is expected behaviour)
Press the Spectrum power button
OBSERVED RESULTS:
For both test methodologies, sometimes we can we can see the warming message on screen. I could not find a 100% sure methodology to reproduce the issue. Nevertheless, the LG Power Manager still shows as “Charging” so maybe a issue with a initial PD handshake gone bad and a retry gone good?
In both methodologies, what was the battery level of the LG?
Does your LG have any sort of utility to see what power level it is being charged at? If so, can you monitor it to see if the PD output is fluctuating during charging?
Model number of your LG device?
For verification: this message never appeared before with your LG connected to the Spectrum prior to the USB firmware update, correct?
What other devices do you have connected to the Spectrum, if any?
Also, this is affected by the USB firmware, so naturally, it will not matter which scaler firmware you install, as that scaler firmware does not have anything to do with PD output, and your testing confirms this.
I need to find a device that can use PD and see how it works with my Spectrum - but that means I need to drain the battery on said device lol…(well, at least partially, so it doesn’t try to trickle charge because it is so close to 100%). But, in the meantime, if you don’t mind doing a bit more testing, that would be helpful.
80%, the LG Power Management in Control Center has a option which sets 80% as max battery to extend battery like. Pretty much like my Samsung phone and tablet.
Not really but so far, it appears that it can still charge, hence why I think the issue is in the initial handshake only
LGgram 16A90P-GAA76P
Indeed, I don’t remember ever seeing it but I can now also reproduce it with v105 (which is my main version)… I also found a easy way to reproduce the issue just power off the Spectrum (using pwr button), wait for image to appear back on laptop then power on the Spectrum… wait for video to be on Spectrum and voila! the warning is there.
I don’t know if this is related but since I’ve updated my USB hub my webcam is constantly flickering in zoom meetings. It’s a Logitech Brio connected to the hub through USB-A 3.0 and the hub is set on auto
Thanks for those replies. I wonder if it is the LG utility that keeps the max at 80% that is causing this, as the PD unit in the Spectrum keeps trying to charge, then is told not to charge because the LG is at the desired battery level, so the PD scales down and then another LG app notices the reduces delivery and throws up a warning for something that another LG utility caused to happen in the first place.
But your supposition about the initial handshake could also very well be a cause, and it is something we’ll need to investigate more thoroughly on our end, too, to rule it out of the list of potential causes.
Of course, the usual processes: check for camera firmware / driver updates, and possibly try uninstalling and then re-installing Zoom?
I had a weird issue with my BRIO in that I had few issues in Teams, but on Google Meet the camera flickered badly. Giving the camera a dedicated USB port from the back i/o on my PC resolved that, even though it was going through Juiced Systems VertexHub, which had no other devices connected to it to being with. Never figured out why that made a difference - but it did.
the warning is there.