06-29-2014 09:55 AM
Intel has new drivers for the HD4400 graphics chipset that's supposed to fix a bunch of issues and that's downloadable from Intel's website. Intel's update utility identifies the drivers as compatible with Yoga 2 Pro, but when attempting to install the installer aborts itself and tells the user to acquire the drivers from the "manufacturer", i.e. Lenovo.
When I check on the Lenovo site, however, there are only drivers dated October 2013.
In graphics driver age that's ancient.
So when is Lenovo allowing its Yoga 2 Pro users to update their HD4400 drivers, which in Oct 2013 were rather broken?
I'm talking about inadequate resolution scaling for the Yoga 2 Pro's high-res screen in some games, for instance, which is a pretty big issue to left unfixed. Meanwhile the Intel Update Manager that came with the Yoga 2 Pro's software bundle cannot, as of May 2014, even connect itself to the net to check for updates for whatever reason.
Solved! Go to Solution.
06-29-2014 10:41 AM
07-16-2014 08:13 AM
I was messing around with the power saving features with the Intel Software.
Y2P (Power profile is my own doing)
-CPU @ .7Ghz
-Brightness @ one button press below 50% on the slider bar
-CPU utilization 0-1%
-Keyboard led off
Panel Self refresh off
Extended battery life for gaming off
Display power saving off
= 5,600 mWh
Panel Self refresh on
Extended battery life for gaming on
Display power saving on (slider to max battery)
= 4,600 mWh
I didn't get any screen flicker but I only had it on those settings for 10 or 15 minutes
As I am typing this post with one tab in Firefox open it is running at 6,600 mWh. Windows reporting 4:22 Hr and 52% battery remaining.
Above measured with Performance Monitor .
07-17-2014 04:50 PM
wankel, are you using the latest intel 4400 drivers? And what settings do you think specifically allowed the flicker to disapear?
I have installed intel drivers before, but always end up going back to the old lenovo drivers because the brightness levels flicker a bit. Even with the adaptive brightness settings off.
Also, you seem to have all your settings geared towards extending battery life. I find that in all but the darkest rooms, I need brightness up close to the top for the screen to be usable.