Agreed, JaymeW. To add that, this problem is shared by SoundTouch 300 owners such as myself. If there is a possible resolution then I would welcome a “private message,” if I inferred correctly.
Oct 18, 2017
There is no green line with the Soundtouch 300. I have one with subwoofer and rear surround speakers and it works perfectly.
I also own the complete 5.1 package and Bose replaced the first soundbar. The replacement has the same problem. You may wish to read the entire thread.
Thank you for the post.
I have reached out to you via private message.
Thank you for posting. As it stands now, development is aware of this and they are working towards getting this resolved. As soon as information is available, we will share this with the community.
Jul 1, 2018
Got my ST300 a week ago. Knew about the problem before but bought it with the (hopefully valid) confidence that this will be fixed.
Initially I only saw it once with an Apple TV 4k being the source. From reading the previous posts here my expecation was that if I would see it at all, then only with 4k HDR sources.
Today I also saw it with my STB that outputs 1080p... The line was gone after a power cycle of the ST300.
Question to existing "problem owners": Do you all have OLED TVs? I do, and I'm wondering if the pixel shift technique that is present in most OLED is somehow related to the problem. Pixel shift regulary moves the whole picture horizontally for one line to the left and right. If overscan is disabled, you would notice this if you would look very closely and with a test pattern, because that pattern that would fit exactly to the screen with disabled overscan would be cut off slightly on the left or right depending on where pixel shift has shifted the picture to at the very moment when you check this. Now I could imagine that the green line is sometimes not visible not because the Bose HDMI chipset works correctly every now and then, but simply because the line is moved out of the visible viewing area by pixel shift. Since I cannot disable pixel shift on my OLED, I have no way to verify this.
If my theory is correct, then the green line would always be visible on a LCD with disabled overscan. But if it's visible only sometimes on a LCD as well, then it's obvious that the Bose HDMI chipset sometimes work properly, and sometimes not.
In any case, it is obvious that the issue is caused by Bose's HDMI implementation.