[John Stroni]

Found a way to play offline 4K. MPV with the option hwdec=auto plays 4K flawlessly.

[John Stroni]

Well there may be some hope for the device. After recharging and discharging the battery about 5 times, I can no longer get 4K video to power off the device.

Furmark still does it easily though, which may not be a surprise since it draws over 8 Watts.

[John Stroni]

Edge browser is capable of rendering flawless 4K. But Chrome or even VLC or MPV are not capable of rendering 4k without massive frame dropping.

Why?

[John Stroni]

Now I got something new.

After the screen was turned off and I turned it back on, every few seconds there would be a massive artifact on the screen until eventually the whole thing powered down. Power consumption was a mere 2.5W at the time.

This tablet is trash, not going to waste any more time on it.

[John Stroni]

Try using Furmark. I’m on battery at 75% atm and the moment I start the stress test at any resolution it triggers the shutdown.

This entire tablet model has defective internal power regulators by design.

Edit: When connected to a power supply, Furmark draws 7-8.5 Watts, something that’s clearly beyond this battery. Maybe all Chuwi is guilty of is not installing proper buffers to simply ensure so much power is never requested on battery.

[John Stroni]

The only chance for a fix is to replace the battery with one that isn’t trash. I will return mine, it’s not worth the money if the tablet can’t be relied on.

And I have no idea why it can’t play 4K, I suspect some corners were cut and there is a bottleneck somewhere, not good.

[Author]

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