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I have a laptop with Geforce 640M video and Intel i5-3317U processor(Acer Aspire M3-581TG).

Nvidia uses driver 331.113 and Intel integrated graphics uses i915. With Nvidia Prime, when I switch to Nvidia card, my performance is a lot worse than it is with Intel across various games.

When I use this command that I saw in another thread:

lspci -vnnn | perl -lne 'print if /^\d+\:.+(\[\S+\:\S+\])/' | grep VGA

both GPUs say they are the VGA controller, maybe that is causing some conflict?

How can I get the proper performance out of Nvidia Card?

  • Ubuntu never seems to work well with NVIDIA. Why not just stick with the Intel? – TheWanderer Apr 23 '15 at 0:15
  • @Zacharee1 Then what would be the point of having that GPU at all? – Okay Apr 23 '15 at 0:26
  • Well, if it doesn't work... No, I'll try to help. Where did you install the driver from? – TheWanderer Apr 23 '15 at 0:28
  • It was there under additional drivers, says from nvidia-331 (proprietary, tested). Not sure from which ppa. – Okay Apr 23 '15 at 0:35
  • Did you reboot? – TheWanderer Apr 23 '15 at 0:38
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Using legacy drivers worked.

I was trying different things and noticed

sudo apt-get install nvidia-current

installs Nvidia 304.125 and not 331.113 drivers. So I did the install.

After that, I was unable to switch graphics with Nvidia Prime. So I removed it

sudo apt-get remove --auto-remove nvidia-prime

and installed Bumblebee instead, as described here: https://wiki.ubuntu.com/Bumblebee

sudo apt-get install bumblebee bumblebee-nvidia primus linux-headers-generic 

Note: I restarted my pc after each step just to be safe.

Now my GPU behaves as expected.

It had terribly low performance and was heating up a lot using 331.113 drivers, I guess something is wrong with those, even though it says tested under additional drives window.

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