Weird Shimmering Display Under Arch and Ubuntu Linux on GT72-QE with GTX 980M

Just bought one of these laptops to run CUDA applications while on the road and all went smoothly until I installed Linux and then activated X (Gnome/Unity/XFCE).  I first noticed this under Ubuntu 14.04 LTS, and the behavior is the same Ubuntu 14.10 LTS, 12.04 LTS, and even Arch Linux.  In all cases, I used the 346.59 NVIDIA display driver either obtained through the Edgers PPA or manually installed.
What I'm seeing is  The laptop display shimmering as if the horizontal sync is slightly off.  External displays look fine.
I've updated the BIOS of the laptop to the 10R version from March and that had no effect.
Has anyone gotten this thing to work under Linux (any linux distro) with the discrete GPU active?  If so, how?

Another guy here with the same problem. We have to create a platform of users. We have spent a lot of money on our equipment; we deserve some quality costumer support. The problem is clear and the solution seems straightforward. It would not take a lot to fix our situation, but we need to team up.
MSI GT72 Dominator GTX 970M with FREEDOS
Now Dual Booting Windows 8.1 and Ubuntu 15.04
Nouveau driver is stable, but does not do the job. Nvidia-346 makes the screen flicker. Switching to integrated graphics (through windows) ubuntu runs perfect. I have tried everything during the last weeks.
I am new to the forum and I have very little time for myself; somebody please take the lead. It wouldn't be the first time I see costumers getting together and achieving support.
By the way, hi, my name is Álvaro 

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    Rebecca Tu
    TechNet Community Support

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