Left eye flickers with picam usage?

[ladyada]

https://forums.adafruit.com/viewtopic.php?f=19&t=131585

unknown why!

[PaintYourDragon]

Answered in forums. I'm like 83% certain it's a power issue. Definitely not a peripheral conflict. Will await their response before closing this.

[v-lopez]

I'm experiencing this and I am not entirely sure it's a power issue.

I also get flickering on the left eye if I stress the CPU. For instance stress --cpu 4 will trigger a significant flicker.

[v-lopez]

At least in my case it only happens with Ubuntu mate, with raspbian it works perfectly fine with picam + stress --cpu 8.

[v-lopez]

Some more info for anyone stumbling on this.

It looks like right eye thread uses only about 5% of a CPU core, but left eye uses almost 100% of a CPU core.
Doing some fiddling with thread affinity and kernel cpu isolation, I reserve one full cpu for the left eye and then it works fine.