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62 Posts

11-14-2020

Turkey

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Re:Lenovo Yoga C940 screen glitches, flickering, flashing

2020-12-31, 22:00 PM

Ok, so again, have fun all :D i am happy for all owners of c940.

 

By the way,

I hope 2021 will bring joy and health to everyone... Happy new year folks!

 

Regards.

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18 Posts

10-04-2020

United Kingdom of Great Britain and Northern Ireland

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Re:Lenovo Yoga C940 screen glitches, flickering, flashing

2021-01-01, 14:14 PM

And that's good enough for me. Time to move from 1909 to 20H2

 

Red Five, I'm going in

 

See you on the other side...

 

Edit: fresh from the other side, I see along with the 20H2 Windows update sneaked on two updates to  "Lenovo - System" - 4.0.0.27 and 15.11.29.13. Wonder if these are relevant? Maybe the later Intel drivers haven't fixed anything - maybe there's been a sneaky fix elsewhere...?

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62 Posts

11-14-2020

Turkey

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  • Posts: 62
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  • Message 163 of 300

Re:Lenovo Yoga C940 screen glitches, flickering, flashing

2021-01-01, 16:14 PM

Yes maybe...

Well there is a saying.. "Eat the grapes, dont ask which vineyard they come from" :))

 

Its a good start for new year. I hope there will be always good news like this in the new year. We all know about 2020 so.. :)

 

 

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62 Posts

11-14-2020

Turkey

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Re:Lenovo Yoga C940 screen glitches, flickering, flashing

2021-01-02, 1:29 AM

Sorry for a bad update but it just happened again. I understood this morning that something weird has just showed up because flickerin on dark mode came back first. (when you turn a dark mode window right after a light webpage with white background)

 

Then task bar replication issue just happened only once during the day.

 

Sorry guys but that driver was false negative.. I guess, i should follow my original plan with warranty route.

 

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18 Posts

10-04-2020

United Kingdom of Great Britain and Northern Ireland

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  • Message 165 of 300

Re:Lenovo Yoga C940 screen glitches, flickering, flashing

2021-01-02, 15:03 PM

(edit: duplicate post - not sure what happened)

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18 Posts

10-04-2020

United Kingdom of Great Britain and Northern Ireland

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  • Message 166 of 300

Re:Lenovo Yoga C940 screen glitches, flickering, flashing

2021-01-02, 15:05 PM

So I just got a task bar replication flash on my au naturel install of Windows 20H2 which included whatever Intel driver Microsoft chose to provide. It seems, therefore, the two updates to "Lenovo - System" were not a fix.

 

I have just installed the latest Intel driver and will see how we get on with that.

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49 Posts

10-03-2020

Norway

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  • Message 167 of 300

Re:Lenovo Yoga C940 screen glitches, flickering, flashing

2021-01-02, 18:05 PM

still working here, but skipped 2 additional updates from windows update (not mandatory) at the moment.

 

the intel system one is old (2017)

and the lenovo firmware driver.......works good without it.

 

have you installed these?

 

so at the moment,.....knock o wood

 

 

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62 Posts

11-14-2020

Turkey

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  • Posts: 62
  • Registered: ‎11-14-2020
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  • Message 168 of 300

Re:Lenovo Yoga C940 screen glitches, flickering, flashing

2021-01-02, 20:08 PM

at 12.10.2020 i installed them.

So no idea why my screen was ok for 5 days nad then it happened again.

I am lost in this. really. no idea.

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62 Posts

11-14-2020

Turkey

63 Signins

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  • Posts: 62
  • Registered: ‎11-14-2020
  • Location: Turkey
  • Views: 620
  • Message 169 of 300

Re:Lenovo Yoga C940 screen glitches, flickering, flashing

2021-01-03, 12:36 PM

Update: I erased two optinal updates we mentioned before (lenovo system etc)... Problem was still there.

Then i erased graphics driver. I installed the one in Lenovo c940's support page. Problem was still there.

Last step, I installed the latest one of Intel Graphics driver and now again the problem is solved.

 

Lets see for how many days of course :)

Interesting issue :) 

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49 Posts

10-03-2020

Norway

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  • Posts: 49
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  • Message 170 of 300

Re:Lenovo Yoga C940 screen glitches, flickering, flashing

2021-01-03, 16:29 PM
strange :) regarding the intel system update. its an Intel Watchdog Timer Driver update. IWD. i have no clue if its needed. but if the system works additional updates is not needed. https://www.windowslatest.com/2020/09/29/dont-use-windows-10s-optional-updates-for-stable-system/
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