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75 Posts

10-30-2019

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Re: X1 extreme screen lag on "second screen only"

2019-12-13, 2:46 AM

 wrote:

I will remove both drivers in safe mode and try to install them again.

 

will post results 

edit: same results - still laggy when using external monitor, not even extending the display, just using external monitor.

 


Sounds like a different issue then.  The lag issue here occurs when you initially use the built-in display (with or without any external displays) and then switch to using ONLY an external display.

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7 Posts

12-08-2019

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Re: X1 extreme screen lag on "second screen only"

2019-12-13, 2:55 AM

This is exactly the issue with my unit as well. Only able set my external monitor(s) at 30Hz for the max refresh rate. I am also using TB3 Workstation Dock to connect my monitors (and have tried directly connect the HDMI cable to the X1E as well - same result). 

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75 Posts

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Re: X1 extreme screen lag on "second screen only"

2019-12-13, 3:01 AM

 wrote:

edit#2 = found out that 30hz its the max frequency that im able to set to the external monitor 

 

 


Just saw this.  I'm not familiar with that particular display, but I do know that there are some 4K 60 Hz displays that only accept that signal over DisplayPort and will only do 30 Hz over HDMI.  The reason is that DisplayPort has supported 4K 60 Hz since DP 1.2, which arrived long before HDMI gained that support with HDMI 2.0, and some 4K 60 Hz displays were made in that pre-HDMI 2.0 period.  The other possibility is that your HDMI cable isn't a "High Speed / 18 Gbps" cable.  Or are you also limited to 30 Hz when using the DisplayPort input?

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8 Posts

10-22-2019

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Re: X1 extreme screen lag on "second screen only"

2019-12-13, 3:36 AM

So,

found this 

https://www.asus.com/Commercial-Monitors/PB287Q/
turns out 4K through HDMI it's 30hz (solved)

now I would need an usb-c to display port to be able to use the full 4K @ 60hz or what other cable types are out there for this purpose?

 

 

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7 Posts

12-08-2019

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Re: X1 extreme screen lag on "second screen only"

2019-12-13, 5:15 AM

And the monitor that I am using is LG 4K monitor (UD2788 model) and per its specification, MINIMUM frequency using HDMI cable is 30 Hz and can support upto 135 Hz. I really wonder what's going on with this problem. 

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Re: X1 extreme screen lag on "second screen only"

2019-12-13, 5:48 AM

 wrote:

So,

found this 

https://www.asus.com/Commercial-Monitors/PB287Q/
turns out 4K through HDMI it's 30hz (solved)

now I would need an usb-c to display port to be able to use the full 4K @ 60hz or what other cable types are out there for this purpose?

 

 


Yes, if the display only supports 4K 60 Hz over DisplayPort, then you'd want a USB-C to DisplayPort cable.  The only alternative would be something like a Thunderbolt docking station and using a regular DisplayPort cable from the dock to the display, but obviously that's more hardware and cost.  USB-C to DisplayPort cables are inexpensive and easy to find.  I'm using one for the first link of my dual QHD daisy chain setup.

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75 Posts

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Re: X1 extreme screen lag on "second screen only"

2019-12-13, 5:52 AM

 wrote:

And the monitor that I am using is LG 4K monitor (UD2788 model) and per its specification, MINIMUM frequency using HDMI cable is 30 Hz and can support upto 135 Hz. I really wonder what's going on with this problem. 


Looking through the Owner's Manual for that display available here, Page 30 says that the maximum resolution is 4K 60 Hz.  Were you maybe looking at the Horizontal Frequency that mentions 135 kHz?  That's completely separate from the signal refresh rate.

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Re: X1 extreme screen lag on "second screen only"

2019-12-13, 6:30 AM
Aha! Thanks for the clarification. Okay, even then, connecting via HDMI isn't an issue with my problem of limiting the frequency at 30 Hz. I checked with the technical support here in Korea, but they cannot find a solution to this at the moment. I am regretting my decision to buy X1E already. Should have invested the same amount to get a desktop and buy a highly portable one for travel.
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8 Posts

10-22-2019

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Re: X1 extreme screen lag on "second screen only"

2019-12-13, 9:44 AM

Thanks for your help.

 

Will buy the cable today and perform a test.

 

Will update with results.

 

I will probably sell or try to return this docking station - ie: anybody wants it ? Lol 

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75 Posts

10-30-2019

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Re: X1 extreme screen lag on "second screen only"

2019-12-13, 14:42 PM

 wrote:
Aha! Thanks for the clarification. Okay, even then, connecting via HDMI isn't an issue with my problem of limiting the frequency at 30 Hz.

Not necessarily.  Similarly to the issue I've just been discussing above, the display's specs don't necessarily mean that all of its inputs have the same capabilities in terms of achieving those.  In your case, once again reading the manual, it appears you need to enable "HDMI Ultra HD Deep Color" in the display settings if you want 4K 60 Hz to be available over HDMI.  This is similar to some TVs where you have to enable an "Enhanced Mode" of some kind, because apparently having support for those modes enabled all the time would introduce compatibility issues with older HDMI sources that don't support HDMI 2.0.  So have you done that, and confirmed you're using a "High Speed / 18 Gbps" HDMI cable as required for 4K 60 Hz?  If you have and it's still not working, just as test have you tried using the DisplayPort input using either a USB-C to DisplayPort cable or a DisplayPort output on a dock that's confirmed to support 4K 60 Hz output?  Apparently you'd also need to make sure to enable the DisplayPort 1.2 option in the display's settings, otherwise you might be limited to 4K 30 Hz even there.

 

That display also has a USB-C input, but it's not clear how the display sets up that interface.  If it sets it up for video + USB 3.x, then it would be limited to 4K 30 Hz unless the display and X1E both supported DisplayPort 1.3+ (HBR3) over USB-C in which case it could do 4K 60 Hz -- but that seems unlikely given the existence of the DisplayPort 1.2 option I mentioned above.  If it sets the USB-C interface up for video + USB 2.0, then it would be able to run 4K 60 Hz even with the original DisplayPort 1.2 (HBR2) over USB-C standard.  Unfortunately the manual just says that the USB-C port supports "USB data", hence my suggestion to test with DisplayPort.

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