Nesousx wrote:Hello all,
I have an hardware question for you. I plan to upgrade my scren to a 27" WQHD. However, in order to attain this resolution both in Dom0 and domU I need to replace the Dom0 onboad IGP by a dedicated PCIe card. The problem is that my current motheboard (Asrock Z77 Pro 4 M) only boot from first PCI express card. This means that my Linux "working" rig has "low end" PCIe card at PCI 3.0 16x while my "gaming" rig has a "high end" card at PCI 2.0 1X (I can't use the 4X slot with my current case, space limitation). The best solution would be to use my "high end" card in PCIe slot 1 and "low end" card in PCIe slot 2 or 3. Which probably means changing motherboard.
I am looking for motherboard (supporting socket 1155 CPUs), that offers the possibiilty to boot from PCI express 1 or 2. Something like PEG1 or PEG2 into the bios. I know Asus does it, but it also seems that Asus doesn't offer VT-d. It is very hard to find accurate information about bios even from vendors themselves, that's why I am asking here directly.
Could you please let me know if your motherboard allows those functionnalities :
* ability to choose from PEG1 / PEG2 inbox Bios
* has to be micro ATX (or smaller)
Thanks in advance
I would hold on to your board. My board doesn't offer any VGA related option in the BIOS and, like you, I thought all hope is lost. Until I tried out Ubuntu 14.04. Both the Unity and the Gnome versions automatically detect both cards and the attached screen and configure a dual screen setup. At first it was annoying, until I saw I could easily disable any of the "screens" (actually the graphics card). In all my recent experiments with Ubuntu 14.04 and Xen as well as KVM I chose the dom0 and domU graphics cards via configuration, not by changing their PCIe slot.
Linux Mint 17 is just around the corner. I'm sure the same can be achieved with LM16, I just haven't tried.
For an experiment, replace the PCI IDs for your domU graphics card in the initramfs and make sure you got a graphics driver for it, then reboot.