[ltp] Re: T520 Ubuntu 11.10 x64 - can't connect external monitor

[Micha]

See if you can set the laptop to discrete mode rather than optimus and
then run both the internal and external displays off the nvidia gpu.
That is what I do with my w520.

On 05/02/2012 19:50, Fen Labalme wrote:
> Hi Connor -
> 
> Thanks for your reply.
> 
> You wrote:
> 
>     To split the load between two cards I would make two "device"
>     sections (say Card0 and Card1) in xorg.conf each referring to a
>     different card by its PCI bus ID (from lspci). Then you'd make
>     Screen0 and Screen1 tied to Card0 and Card1 respectively. At this
>     point you have a choice. You can leave the cards on separate logical
>     screens. This means you can't move windows between then and you have
>     to use Ctrl+Alt+Fn to switch which one is active but 3D acceleration
>     should work. If you want to give up 3D acceleration to have a more
>     traditional multi-monitor setup, enable Xinerama and put something like
> 
>     Screen 1 "Screen1" LeftOf "Screen0"
> 
>     in your "ServerLayout" section. If your problem is that the BIOS or
>     something is refusing to engage the integrated and discrete cards at
>     the same time, I've heard of a program called bumblebee that can
>     deal with that but I don't know anything about it.
> 
> 
> That would be great and is what I will try next.  First step will be to
> switch the BIOS back to Optimus and then see if I can configure the
> Intel Integrated GPU for the laptop screen and the Nvidia card for the
> VGA output.  (Is this what you were suggesting?)  Would this prevent
> e.g., Mirror Displays from working?  Maybe I could get the integrated
> GPU to handle the laptop and the VGA out, and the Discrete Nvidia to
> support the DisplayPort.  This would be ideal, as at hope (with external
> monitor attached via DisplayPort) I don't need to mirror displays.
> 
> Do you think this sounds possible?  (I wonder if I'll need to load
> Bumblebee for this...)
> 
> Thanks!
> =Fen