Displayport and HDMI to receiver

famasfilms · 18th November 2020, 16:29

I have a Geforce 1650 Super which was connected via DVI-HDMI to an LG 24GL600f monitor, and to a Denon 3200 receiver via HDMI. The receiver is also connected to an LG OLED.

Everything worked fine with the Monitor as the primary screen, the TV as an occasional second screen and audio to the receiver.

I bought a displayport cable to get 144hz on the monitor and now everything is acting weird:

When I turn on the PC there's no signal on the monitor unless I also turn on the TV, this is annoying because the TV is rarely used and is not a daily second screen.

When I turn off the TV things go funny in windows. All my open programs, quick launch and system tray disappear from the taskbar and it's like the monitor has become the secondary screen. Plus it looks like the phantom primary screen (The TV) is now on the opposite side of the monitor.

When I turn the TV back on, all my taskbar stuff comes back.

This seems to happen regardless of whether the screens are set up as duplicates or extended desktops.

I also tried running the HDMI cable from the Intel integrated gfx to the receiver and had the exact same issue. Turning off the TV "sets" the monitor from primary display to secondary

SeeMoreDigital · 18th November 2020, 17:58

Quote:

Originally Posted by famasfilms

I bought a displayport cable to get 144hz on the monitor...

Why exactly do you need 144Hz?

Blue_MiSfit · 21st November 2020, 00:13

Gaming

High refresh rate on the desktop is absolutely glorious, even just for office work!

I'm not clear on how OP is configured, but is this maybe a limitation in how many pixels per second this GPU can push out? Does this happen if you run the monitor at 60 Hz?

QBhd · 21st November 2020, 01:57

All you need to do is set the #2 monitor to be the main monitor in Windows. I used to think that HDMI would trigger Windows into thinking it is number 1... However, I now have both my TV and monitor on HDMI and still my TV comes up as number 1. I now think it is based on screen size. The monitor being smaller than the 4k TV.

QB

foxyshadis · 28th November 2020, 10:56

20H2 fixed a longstanding issue I had with turning my monitor on or off reverting back and forth to the built-in screen repeatedly. Well "fixed" as in now it only switches directly to the laptop screen when the monitor is turned off, instead of back and forth. Something involved in that change might have affected your setup; the best I can say is disconnect it if you aren't using it until (hopefully) a driver comes along to fix that issue.

18th November 2020, 16:29	#1 \| Link
famasfilms Registered User Join Date: May 2015 Posts: 29	Displayport and HDMI to receiver I have a Geforce 1650 Super which was connected via DVI-HDMI to an LG 24GL600f monitor, and to a Denon 3200 receiver via HDMI. The receiver is also connected to an LG OLED. Everything worked fine with the Monitor as the primary screen, the TV as an occasional second screen and audio to the receiver. I bought a displayport cable to get 144hz on the monitor and now everything is acting weird: When I turn on the PC there's no signal on the monitor unless I also turn on the TV, this is annoying because the TV is rarely used and is not a daily second screen. When I turn off the TV things go funny in windows. All my open programs, quick launch and system tray disappear from the taskbar and it's like the monitor has become the secondary screen. Plus it looks like the phantom primary screen (The TV) is now on the opposite side of the monitor. When I turn the TV back on, all my taskbar stuff comes back. This seems to happen regardless of whether the screens are set up as duplicates or extended desktops. I also tried running the HDMI cable from the Intel integrated gfx to the receiver and had the exact same issue. Turning off the TV "sets" the monitor from primary display to secondary

21st November 2020, 01:57	#4 \| Link
QBhd QB the Slayer Join Date: Feb 2011 Location: Toronto Posts: 697	All you need to do is set the #2 monitor to be the main monitor in Windows. I used to think that HDMI would trigger Windows into thinking it is number 1... However, I now have both my TV and monitor on HDMI and still my TV comes up as number 1. I now think it is based on screen size. The monitor being smaller than the 4k TV. QB __________________

21st November 2020, 00:13	#3 \| Link
Blue_MiSfit Derek Prestegard IRL Join Date: Nov 2003 Location: Los Angeles Posts: 5,989	Gaming High refresh rate on the desktop is absolutely glorious, even just for office work! I'm not clear on how OP is configured, but is this maybe a limitation in how many pixels per second this GPU can push out? Does this happen if you run the monitor at 60 Hz?

28th November 2020, 10:56	#5 \| Link
foxyshadis Angel of Night Join Date: Nov 2004 Location: Tangled in the silks Posts: 9,559	20H2 fixed a longstanding issue I had with turning my monitor on or off reverting back and forth to the built-in screen repeatedly. Well "fixed" as in now it only switches directly to the laptop screen when the monitor is turned off, instead of back and forth. Something involved in that change might have affected your setup; the best I can say is disconnect it if you aren't using it until (hopefully) a driver comes along to fix that issue.