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4 Posts

07-30-2019

US

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  • Message 21 of 62

Re: Thunderbolt 3 dock Gen 2 and Thinkpad P1 lag

2019-08-30, 16:34 PM

So far the only thing that has helped is changing the BIOS to use NVIDIA only (more power burn)

 

F1 on Boot / Config / Display / Graphics Device from Hybrid to Discrete

 

Let me know how it goes

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7 Posts

08-05-2019

AU

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  • Message 22 of 62

Re: Thunderbolt 3 dock Gen 2 and Thinkpad P1 lag

2019-09-01, 4:54 AM
How did you figure out killing dwm.exe fixes it? I just tried it and can confirm it works. Is there a way to disable it permanently or is this something that needs to be running on startup?
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2 Posts

09-03-2019

CA

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  • Message 23 of 62

Re: Thunderbolt 3 dock Gen 2 and Thinkpad P1 lag

2019-09-03, 13:06 PM

I can confirm that I have the same video lag issue with the P1 and Thunderbolt 3 Dock Gen 2.  The issue seems completely related to the video drivers.  My monitor is connected to two different computers using 2 inputs (The P1 is on DisplayPort, the other computer on HDMI).  My P1 video will lag terribly if I switch my monitor to the HDMI input then back to the P1.  I used to switch freely between PCs as required, now I have to sleep or reboot my P1 every time I switch between.

 

As of August 31st I'm running the latest video drivers and thunderbolt drivers, as well as the most recent P1 BIOS and Dock bios. 

 

An early work around I found was to disable the Intel display adapter in the BIOS, but it severly affected battery life.  This thread on the Nvidia site goes back years with users of many different brands & models complaining of the exact same issue.  There is something wrong with one of the drivers on systems that use Intel&Nvidia hybrid graphics.  There are some suggestions for work arounds like disabling the Intel adapter in device manager, or killing explorer.exe:

 

https://www.nvidia.com/en-us/geforce/forums/geforce-graphics-cards/5/257428/laptop-1070-external-monitor-stutter/

 

Given that this issue has existed for years, I'm not hopeful that Intel/nVidia/Microsoft is going to fix it anytime soon.

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4 Posts

07-16-2019

CL

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  • Message 24 of 62

Re: Thunderbolt 3 dock Gen 2 and Thinkpad P1 lag

2019-09-05, 0:56 AM

But are you sure that this is monitor related and not dock related? 

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2 Posts

09-03-2019

CA

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  • Message 25 of 62

Re: Thunderbolt 3 dock Gen 2 and Thinkpad P1 lag

2019-09-05, 13:10 PM

I'm not 100% sure, but that nVidia thread describes the same problem with reports from users of all kinds of systems, not just Lenovo.  The common trait seems to be a laptop with a discrete nVidia grahpics card + hybrid integrated intel graphics + an external display through DP or HDMI.  I'm not 100% certain if the dock is required to cause the issue on Lenovo.  In all cases people report that either disabling the Intel card through the BIOS or Device Manager resolved the issue at the expense of battery life.   I too suspected the docking station for a while, but I'm not sure it's actually causing the problem.

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1 Posts

09-10-2019

DE

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  • Message 26 of 62

Re: Thunderbolt 3 dock Gen 2 and Thinkpad P1 lag

2019-09-10, 16:29 PM

I have the same issue with an brand new P53 and the 170W Workstation Dock 40AN0170EU. All drivers and FWs are up to date.

 

Killing dwm.exe ("Desktopfenster-Manager" in german) is a quick workaround.

 

 

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3 Posts

09-11-2019

US

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  • Message 27 of 62

Re: Thunderbolt 3 dock Gen 2 and Thinkpad P1 lag

2019-09-11, 14:06 PM

I have been grapling with this very annoying issue since I got my X1 Extreme about four months ago.  This is the first forum where I have gotten confirmation that it is not "just me" having this problem.

 

Killing dwm.exe also worked in my case, but this hardly is a great customer solution.  Has anyone tried reporting this issue to Nvidia, Intel, or Microsoft support?  If there are any support tickets open for this issue, we could apply our collective influience to pressure them for a fix.

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7 Posts

08-05-2019

AU

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  • Message 28 of 62

Re: Thunderbolt 3 dock Gen 2 and Thinkpad P1 lag

2019-09-21, 8:26 AM

I just ended up turning off the integrated graphics in the bios. Seems to have solved most problems. Haven't noticed too much difference in battery life when using laptop by itself.

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4 Posts

09-20-2018

US

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  • Message 29 of 62

Re: Thunderbolt 3 dock Gen 2 and Thinkpad P1 lag

2019-09-30, 17:30 PM

I can confirm that setting the BIOS setting under 'Display' to 'Discrete Graphics Only' fixes the issue.  After setting this setting I no longer need to leave my lid open to get ok performance.  Also, certain graphics-intense applications that were slow even with the lid open are now vastly faster.  

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1 Posts

10-25-2019

IT

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  • Message 30 of 62

Re: Thunderbolt 3 dock Gen 2 and Thinkpad P1 lag

2019-10-25, 8:41 AM

I'm having the same issue with a 1st gen Thinpad P1 and a Thunderbolt workstation dock, I'm wondering why Lenovo isn't doing anything since the problem seems very common...

I've moved from HP notebooks to Lenovo due to similar problems with another Thunderbolt dock, but I'm regretting the choice.

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