12-21-2019 12:17 PM
I have been using a ThinkBook 13s-IWL (20R9) for some time now. Now I bought a LG 27UL850-W 68 (Ultra HD, 4K) screen to replace my old Full HD BenQ screen, but am encountering problems:
The User Guide tells me the laptop should be able to work with the screen with 60hz via USB-C ("USB-C to DP: 3840 X 2160 pixels, 60 Hz"). But this doesn't work at all, when I connect the screen via USB-C I get the following warning/error message in Windows 10:
The linked website in the notification by Microsoft https://support.microsoft.com/en-us/help/4012609/windows-10-fix-usb-c-problems#connectionlimited unfortunately does not help at all and offers no working solution.
All drivers (including Bios) are up to date according to the Lenovo website (which identified the laptop via serial number).
The screen and cables I am using work perfectly fine via USB-C with iPad, Macbook and Pixelbook.
Using HDMI I can also use the screen with my Thinkbook, but as usual for a 4K screen it only supports 30hz and has considerable lag - which is not acceptable for me really.
Any idea what could be going wrong here and how I could fix it?
Solved! Go to Solution.
12-22-2019 06:55 AM
Hi janpio! Welcome to our forums community.
What is the current resolution on the current external display? Could you try changing the resolution and check if that works for you. Let us know how did it go.
12-22-2019 07:01 AM
I can not unfortunately as Windows 10 does not show the screen in "Display Settings" (and the screen also keeps complaining that there is no input). Seems to me Windows really does not recognize the screen via USB-C for some reason.
12-25-2019 04:05 PM
Ah, sorry I misread your response.
The monitor's resolution is its native 3840 X 2160 pixels. I could not find an option to change this in the screen itself, just to change the HUD size which had no influence over that the computer does not recognize the screen unfortunately.
12-26-2019 08:22 AM
How about the HDMI, did it work on the new monitor? Could you try connecting the laptop to other external monitors through the USB-C to check if it's connected? And also, provide us the system information so we could check the OS build version and BIOS version? Type msinfo on the search box beside the Windows icon on the left side of the screen.
12-26-2019 08:43 AM
> How about the HDMI, did it work on the new monitor?
HDMI works, but as expected only with 30hz which is quite laggy.
> Could you try connecting the laptop to other external monitors through the USB-C to check if it's connected?
I could not get the laptop to power any 4K screen via USB-C unfortunately.
(I could get all other laptops with USB-C to power the screen though)
I will provide the system information as quick as possible, travelling right now.
12-28-2019 05:25 AM
Back with the computer, so:
> And also, provide us the system information so we could check the OS build version and BIOS version? Type msinfo on the search box beside the Windows icon on the left side of the screen.
OS Name Microsoft Windows 10 Pro Version 10.0.17763 Build 17763 Other OS Description Not Available OS Manufacturer Microsoft Corporation System Name THINKBOOK System Manufacturer LENOVO System Model 20R9 System Type x64-based PC System SKU LENOVO_MT_20R9_BU_idea_FM_ThinkBook 13s-IWL Processor Intel(R) Core(TM) i7-8565U CPU @ 1.80GHz, 1992 Mhz, 4 Core(s), 8 Logical Processor(s) BIOS Version/Date LENOVO 9YCN43WW, 05/11/2019 SMBIOS Version 3.1 Embedded Controller Version 1.37 BIOS Mode UEFI BaseBoard Manufacturer LENOVO BaseBoard Product LNVNB161216 BaseBoard Version SDK0J40697WIN Platform Role Mobile Secure Boot State On PCR7 Configuration Elevation Required to View Windows Directory C:\WINDOWS System Directory C:\WINDOWS\system32 Boot Device \Device\HarddiskVolume1 Locale Germany Hardware Abstraction Layer Version = "10.0.17763.831" User Name THINKBOOK\Jan Time Zone W. Europe Standard Time Installed Physical Memory (RAM) 16,0 GB Total Physical Memory 15,8 GB Available Physical Memory 12,2 GB Total Virtual Memory 25,3 GB Available Virtual Memory 21,2 GB Page File Space 9,50 GB Page File C:\pagefile.sys Kernel DMA Protection Off Virtualization-based security Not enabled Device Encryption Support Elevation Required to View Hyper-V - VM Monitor Mode Extensions Yes Hyper-V - Second Level Address Translation Extensions Yes Hyper-V - Virtualization Enabled in Firmware Yes Hyper-V - Data Execution Protection Yes
Do you need any other information from `msinfo`?
12-30-2019 09:18 AM
01-07-2020 09:07 AM
Wow, I had the same issue with a dell U2719DC and it baffles me that it doesn't work with USB-C. The solution with a separate adapter does work strangely enough... Thanks