12-02-2019 07:08 AM
Installed the updated driver this morning and until now (7 hours later) no issues found, so looks promising.
Please note you'll have to set the BIOS back to "hybrid", otherwise the driver won't install (error "Operating system version not supported").
12-02-2019 01:49 PM
I've also installed the driver on my X1 Extreme Gen1 (the driver linked is in the Gen2 section, but since the Gen1 also uses an Intel 630 iGPU I gave it a shot anyway). Installation went without problems and so far it looks promising.
I'll keep an eye on it the next few days and report back if that update helped.
12-02-2019 03:32 PM
Could it be? The README.txt shows that this patch does target the second screen lag.....
CHANGES IN THIS RELEASE Version 184.108.40.20629 [Important updates] Nothing. [New functions or enhancements] Nothing. [Problem fixes] - Fixed an issue where there is lag when drag app interface under Second Screen Only mode.
12-02-2019 04:35 PM - edited 12-02-2019 04:58 PM
Just updated the driver. I found the stuttering problem stopped, but not completely solved.
but when the lid is closed all the external displays (I have 2) stuck in 30hz.
BUT when you open the lid, all of them becomes 60hz again....
Thinkpad Thunderbolt 3 Workstation Dock
Display 1: LG 4k Monitor 27UL650
Display 2: LG 4k Monitor 27UL650
FAST STARTUP: DISABLED.
NOT GOOD, NOT GOOD Lenovo
12-02-2019 04:40 PM - last edited on 12-03-2019 01:46 AM by Andy_Lenovo
This update still has problem, the 2 external displays are locked to 30hz when the lid is closed(external only mode), but when you the open the lid (and also use the internal display) it goes back to 60hz again.
Admin note: seems like a different issue. To avoid confusing issues please start a new topic.
12-02-2019 07:21 PM
May i suggest you run this tool (Display Driver Uninstall) -- You need to run it in safe mode
Then re-install the latest Intel and Nvidia drivers from the Lenovo website.
12-03-2019 03:12 AM - edited 12-03-2019 03:37 AM
@all who have installed the latest Intel display driver (version 220.127.116.1129):
Launch Chrome or Brave or Edge Dev/Beta or even Firefox and switch to extended desktop mode and then run YouTube on the built-in screen, right click on the video and turn on "stats for nerds" and check dropped frames (even for 720p videos, not just 1080p and above), move the mouse pointer over the video and check again. Now move the window over to an external screen and check dropped frames again. Lots of dropped frames on my end. Also, the video and audio are out of sync most of the time on the built-in screen. Moving the browser window to the external screen and they are in sync again.
Seriously, what's going on? Is it normal that the built-in GPU cannot even handle a YouTube video at 720p?
Update: I did the same tests using pre-2019 Edge (not the Chromium-based new version) and the video plays just fine even in 4K, there are no dropped frames and everything is in sync.
12-04-2019 12:52 AM
In chrome there is a bug if you enable/disable discrete only mode in the BIOS. This will either make chrome have a black screen or chrome will use CPU only to render. Before enabling disabling discrete only in bios you first have to uninstall chrome. Luckily after reinstalling chrome all cookies/saved form/passwords are still available.
So don't post test results from chrome if you haven't reinstalled chrome while you did some testing with the BIOS discrete only mode.