T420 - external monitor uses dedicated graphics - higher temps as without it

I had my fullHD monitor plugged to VGA and it was all ok. Sinde I plugged it in displayport (via DVI-Displayport adapter) it uses dedicated graphics - nvidia taskbar icon is showing it. Chrome, Thunderbird and some other programs are now using dedicated graphics too, even if i set in Nvidia Control panel Chrome to use only integrated graphics.
Any ideas ? I think, that when all these programs are now using dedicated graphics, the temperatures are higher than before.
T420 i7-2620M, 8GB RAM, NVS 4200M 1GB, OCZ Agility 3 SSD 120 GB + 500 GB HDD in Ultrabay, Windows 8.1 Ultimate 64bit

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I've got a MacBook pro 15' running 10.6.6. I want to use an external monitor for my graphic design work running Adobe software and thought I'd try an HD TV. I ran a Mini Display to HDMI lead to the TV but the picture quality was disappointing.

I've got a MacBook Pro 15' running 10.6.6. I want to use an external monitor for my graphic design work using Adobe software and thought I'd try an HD TV. I ran a Mini Display to HDMI lead to the TV but the picture quality was disappointing. I also tried a Mini Display to VGA lead and that wasn't much better. I tried all variations of resolutions in System prefs - Displays but nothing helped. Am I getting something wrong? Thanks all.

In addition to pixel density, you are up against the translation driver card in the TV.
If you read the fine print of computer-resolution-capability in the TV user guide, you will see a chart as tall as the manual page. At the top is the smallest resolution capable, at the bottom is the full use of the 1080p in the TV.
Mac falls into the top 25% of the page, maxing out at 1366x768 often. This is because the TV control card is expected to do too much of the work, but is not designed for computer-monitor processing.
I looked at the resolution charts on 2 TVs before deciding to buy a 1080p LCD monitor that has a TV interface/connector. Computer monitor first, TV second. But the thing is only 27 in. Good thing TV is not as important to me as it is to others.

HDTV as external monitor using ethernet connection

Hello,
I want to connect my HDTV to my iMac and use it as an external monitor.
My HDTV is about 25 ft away from my iMac.
A HDMI cable of that length cost over 200 $.
So, its not an option to me.
I just bought a smart rooter but my HDTV Panasonic Viera P50GT30 is not a smart TV.
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Pierre.

This look's good.
http://www.startech.com/AV/Extenders/HDMI/HDMI-over-IP-Extender-with-Audio~IPUSB 2HD2
But its not.
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Thanks.

Yes it is possible, but "at your own risk". Look for "Screen spanning doctor".
If you test it, please report here the maximum resolution you can use in clamshell mode. I am going to buy a monitor and I wasn't able to find such value.
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I have not tested yet the 2.6.39 kernel from [testing] as I'm reporting the issue when I have tested that is not some kernel config that I have broke but the version. (currently I'm downloading kernel26 from [testing] but I cannot test if the same happens before 3 hours or so, as I'm writing the post from college)
As this is the first time I report some issue like this, I'm kind of clueless what logs should I post here to be helpful.
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Last edited by ethail (2011-06-01 15:57:11)

I have tried packages on testing related to xorg or intel drivers to see if that problem was still existing. It does. Doing some research I have found that this seems to be kernel related and not a driver or xorg thing and I have found no solutions.
There are all kind of troubles with intel graphic cards and i9xx drivers:
http://www.phoronix.com/scan.php?page=a … orks&num=1
Also, there is quite a "funny" discussion here:
http://forums.fedoraforum.org/showthread.php?t=263684
As it seems this is a kernel related problem, do we have more options than wait from upstream to fix this? Does anyone find any workaround?
EDIT: adding dmesg output when I plug the external monitor:
http://pastebin.com/qUAVhG7U
Last edited by ethail (2011-06-04 14:58:38)

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Hello!
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i have the same problem too , i expect your comments folks!!!
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Hi Everyone..
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i everyone, I recently purchased a refurbished MSIGe60 laptop online equipped with a 2gb Nvidia Gtx660m and has the integrated intel HD 4000 as well. My laptop at the moment seems to be always using the Intel graphics, because I am getting terrible performance for games that this should be able to play as I've reserached on various videos on youtube. For example, I should be able to play skyrim with at least high graphics at 60fps , but whenever I load it up the game automatically has my settings to Low, and even if i change it to high the fps is unbearable. I have the latest drivers as far as im aware, and whenever I play a game it is always has the "run with NVIDIA high performance processor" as a default. Is there anything I can do about this? I have searched this topic many times and I know many people with the same model laptop have had this problem but I can't seem to solve what is wrong with it not using the graphics card even if it is set to it. Any tips would be much appreciated, thank you.

Quote from: Svet on 01-October-14, 22:05:12
Nope, for this model power button is not indicator for graphics cards
its always light in blue with regardless what video card is in use
@GatorKing95
is your nvidia card 660m is proper installed when you look in device manager?
If yes:
when you go to Nvidia control panel,
under 3D settings, then select "Adjust image settings with preview"
and leave it in that way, does your Turbo button start lighting?
If I remember right, the power button still changes on the GE series. Watching a few videos, I did in fact see the power button switching colors when using different video cards. I believe ALL the gaming laptops use this feature, as an added indicator for which video card is in fact in use.

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Hi
bought the convertor cable to connect my TV which I use at as a monitor and connected it up. The monitor only works when the lid/screen/clamshell is closed.
On my windows laptop I can use the keyboard and the external monitor, is this not possible with the macbbok pro ie use the built in keyboard with the external monitor?
thanks
Ian

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External monitor use---AWESOME!

Folks, I have had this little MacBook for over a month now and until today, I have never used an external monitor on it. Simply put, the experience was absolutely amazing.
Hook up an external keyboard, hook up the monitor, put the computer to sleep.
Wake it up, and in a few moments the monitor comes to life, complete with a display setting that takes advantage of the monitor's resolution.
I was also impressed with the performance. This monitor is typically connected to my Mac G4 Tower, with its 1.5 ghz OWC CPU. So, when I see a Mac image on that monitor, I'm referencing what I'm used to with that Tower.
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Hook up an external keyboard, hook up the monitor, put the computer to sleep.
Next time try plugging in the monitor without putting the MB to sleep. It will automatically recognize and adjust.
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As soon as the last connection was made the MB instantly switched to 1027x768 and the image appeared on the projector. One hit of F7 and I had dual display working for doing keynote slides on the big screen while having notes and timers on the MB screen.
Pretty sweet.

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T420 - external monitor uses dedicated graphics - higher temps as without it

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