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T520 Graphics.
T520 Graphics.
My T520 (4243WD1) appears to have both Intel HD Graphics 3000 and NVIDIA Optimas GPU. Running Windows 7 64 bit.
In BIOS, there are three options. Integrated, Discrete and Optimus. It says that OS will switch to Optimus if supported. I think there is also an option to prevent that from happening.
After doing some troubleshooting on another issue, I have system back working. But not sure if my messing around got me back where I should be!
What I see, is that my laptop screen is on Intel HD 3000 and my external monitor on Nvidia Optimus. Is that normal?
I ask because my Windows Experience graphics score is now lower than it was before (5.9 vs 6.5)
In BIOS, there are three options. Integrated, Discrete and Optimus. It says that OS will switch to Optimus if supported. I think there is also an option to prevent that from happening.
After doing some troubleshooting on another issue, I have system back working. But not sure if my messing around got me back where I should be!
What I see, is that my laptop screen is on Intel HD 3000 and my external monitor on Nvidia Optimus. Is that normal?
I ask because my Windows Experience graphics score is now lower than it was before (5.9 vs 6.5)
Re: T520 Graphics.
Another thing I see.
I see no easy way to switch from External to laptop monitor. Seems there are two competing controls - The windows Display controls in Control panel and the Nvidia control panel. I am sure this wasn't always like this?????
Another strange thing - The NVIDIA control panel brings up only the laptop as option - the one that is apparently being controlled by the Intel graphics. Can't switch there. The Windows Display in Control panel brings up the External monitor (controlled by NVIdia. But there I can switch displays. Finally discovered that I can switch displays by using Fn F7 on laptop keyboard but not using my USB external keyboard!
If it seems like I am confused - I am! And I have owned this T520 for 5 years (IBM Re-Certified used unit)
I see no easy way to switch from External to laptop monitor. Seems there are two competing controls - The windows Display controls in Control panel and the Nvidia control panel. I am sure this wasn't always like this?????
Another strange thing - The NVIDIA control panel brings up only the laptop as option - the one that is apparently being controlled by the Intel graphics. Can't switch there. The Windows Display in Control panel brings up the External monitor (controlled by NVIdia. But there I can switch displays. Finally discovered that I can switch displays by using Fn F7 on laptop keyboard but not using my USB external keyboard!
If it seems like I am confused - I am! And I have owned this T520 for 5 years (IBM Re-Certified used unit)
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Re: T520 Graphics.
I'd suggest you read "Chapter 7. Fn key combinations" in the HMM manual.
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Re: T520 Graphics.
The Fn key on the laptop keyboard and the Fn key on the desktop keyboard (if your desktop keyboard has such a key) typically send different signals. In fact, I think Fn on the laptop keyboard does not even send a scancode - it is handled entirely on the Embedded Controller level.
In any version of Windows starting from Windows 7 there is a built-in key combination to switch between different multi-monitor options: WinKey+P. Fn+F7 on these systems does essentially the same thing as Win+P.
In any version of Windows starting from Windows 7 there is a built-in key combination to switch between different multi-monitor options: WinKey+P. Fn+F7 on these systems does essentially the same thing as Win+P.
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Re: T520 Graphics.
Ok thanks for input on switching. So long as I use the laptop keyboard winlogo/P works; From external it also works. Fn/F7 works from laptop, but not from external keyboard.
I thought the video stuttering I mentioned in another thread had been solved with new cable, but it is back again. Simple test I do, is run any CNN video on laptop. Works perfectly. Run same video after switching to external monitor and every few seconds, I briefly get that circling arrow and the video stutters. Less than before I changed cable, but still happens. I will go back to the other thread to keep things in same place.
I thought the video stuttering I mentioned in another thread had been solved with new cable, but it is back again. Simple test I do, is run any CNN video on laptop. Works perfectly. Run same video after switching to external monitor and every few seconds, I briefly get that circling arrow and the video stutters. Less than before I changed cable, but still happens. I will go back to the other thread to keep things in same place.
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