Displayport 1.4 DSC mode causes alt-tabbing out of full screen game black screen for 1-2 seconds
It started happening since I switch to my new monitor (LG 27GN950). The display will black screen for 1-2 seconds when I alt tab out to desktop, but not when I alt tab back. Using window borderless solve the issue but I want to find out the real problem since this didn't happen with my old setup (ASUS PG279Q).
I tried switching different settings like 8 bit and 10 bit color, refresh rate, response time, updating GPU driver, make sure desktop and game settings are the same and nothing work. In the end I changed the input from Displayport 1.4(DSC) to just 1.4 and it solve the problem. But now I limited to 120hz and 8 bit color. DSC is one of the reason I bought this monitor, and I can't find anyone else reporting similar issue.
Can anyone confirm that this is an issue caused by Displayport DSC mode?
Posted Nov 14, 2020, 5:01 AM UTC
afaik there was a hotfix or something for this that should be baked into the most recent nvidia driver now.
However as someone in the same boat I can confirm this still happens.
I just installed the latest driver (Cold War Game ready) and it didn't help. For me the most confusing part is it only happen when I alt-tab out, but not back in, doesn't make any sense to me.