What I would like to be able to do:
I would like to be able to switch between my dedicated graphics card (AMD) and integrated chip (Intel) from the BIOS, that means:
Restart → BIOS: set to integrated Intel enabled (only) → boot
Restart → BIOS: set to discrete AMD enabled (only) → boot
This type of primitive switching works fine when running on open source drivers. However, as soon as I install
fglrx, switching from AMD to Intel from the BIOS breaks the session and the system falls back to low-graphics mode on boot-up.
What I did:
- fresh system, open source drivers with Intel enabled
- switched to AMD = no problemo!
- switched to Intel = no problemo!
- (the above repeated few times and tested for performance issues)
- installed proprietary AMD drivers per http://www.unixmen.com/ubuntu-12-10-and-amd-catalyst-problem-solved/ (PPA) ⇒ working fine after restart!
- switched to Intel ⇒ broken configuration, i.e. system boots to 2D/fallback mode!
Why do I need it?
First of all, it's a matter of my curiosity. More importantly though, getting this thing to switch on AMD proprietary would be huge for me.
I was asking about AMD/Intel switching a while ago and while I got the answer, 1) it doesn't work 2) I can't contact the author of the answer 3) I suspect the answer is overcomplicated.
In summary I need help either with this question or with the old one linked above.
Ubuntu 12.04 amd64, installed clean
Lenovo Thinkpad T500
Intel GMA 4500MHD / ATI Mobility Radeon HD 3650