I have used looking glass without any problems for quite a while, until today. I noticed that when looking glass is on my middle monitor, it becomes incredibly blurry, while if it is on my other screens, it looks crisp. All my monitors are 4k, including the guest os, however my middle screen is 144hz, so i want to use my middle screen with looking glass, like i have been doing for ages.
The most annoying part is i did not change anything since yesterday, just shut down my pc yesterday, booted it up today, and now only on my middle screen looking-glass is blurry. A reboot did not help, neither did unplugging everything and plugging everything back in again. I don’t have a clue what could have caused this, so i don’t really know what i should even share when it comes to debugging info. At this point i am mostly just curious if anyone else has run in to this issue before, and if so, what they did about it (if anything).
I have attached 2 screenshots below for reference. The only difference between them is that i moved the looking glass window between monitors, and in one it looks very blurry, in the other it does not.
[EDIT]:
The problem seems to have solved it self after multiple restarts. No idea what the actual problem was and whether it will be back.
This effect is when LG is scaling the guest to fit the client area, which happens if the view port area is smaller then the guest resolution. Even being out by a single pixel is enough to trigger this.
In any case, this is not a LG fault, but something with your system configuration. LG doesn’t track or even care what monitor it renders on.
I am quite certain this is not the issue, because even when running looking glass at a lower resolution (lets say in windowed mode, but maximized) it was way sharper on one monitor vs the other. I know what scaling down a image from 4k to even just 1 pixel less looks like, and this wasn’t it. It more so looked like it got scaled down from 4k, to 1080p, back to 4k. If there is anything scaling related causing this issue i would expect pixel alignment over a resolution issue, as i have had similar pixel alignement issues when developing on a android emulator or when working with shaders.
Regardless, the issue solved it self without me making a single change. If it happens again, i will make sure to note down all the screen resolutions and alignments, see if i can find window positions, or anything else that would indicate an issue. If you have any other things you would suggest to look in to if the issue occurs again, i would be happy to look in to it.
