Dual Monitor and USB issues during bios/Chimera boot

[TacoRye]

Hello all,

My bios (Gigabyte Z87X-UD3H) will not display when dual monitors are plugged in.

Additionally, only the front USB ports work during boot sequence.

Both monitors work once I log into OSx 10.10.5. As well as rear usb ports.

The issue is that I have to unplug one monitor everytime I want to boot.

Any assistance is appreciated.

Thanks,
Ryan

 

[fragment7]

do you have pcirootuid=1?

 

[TacoRye]

do you have pcirootuid=1?

I do not know. Where would I have this code?

Is this for chameleon bootloader? If so, what is the exact code language.

Thank you for the very timely response!!

- Ryan

 

[fragment7]

go to your /extra and look for org.chameleon.Boot.plist then click it hit space and under <key>Kernel Flags</key> there should be something like kext-dev-mode=1 (if you're under yosemite) PCIRootUID=1

 

[TacoRye]

Thanks again!

Here is my current boot plist for Yosemite 10.10.5

<dict>
<key>EthernetBuiltIn</key>
<string>Yes</string>
<key>GenerateCStates</key>
<string>Yes</string>
<key>GeneratePStates</key>
<string>Yes</string>
<key>Graphics Mode</key>
<string>"1920x1080x32"</string>
<key>GraphicsEnabler</key>
<string>No</string>
<key>IGPEnabler</key>
<string>No</string>
<key>Instant Menu</key>
<string>Yes</string>
<key>Timeout</key>
<string>2</string>
<key>Kernel Flags</key>
<string>kext-dev-mode=1 nvda_drv=1</string>
<key>Legacy Logo</key>
<string>Yes</string>
<key>UseKernelCache</key>
<string>Yes</string>
<key>UseMemDetect</key>
<string>No</string>
</dict>

What should I change?

 

[fragment7]

<string>kext-dev-mode=1 nvda_drv=1 PCIRootUID=1</string>

yours should look like this, if it doesn't work, you might need to have a dsdt/or inject the gpu inside your .plist

 

[TacoRye]

Thanks,

This will help display the Bios screens during boot as well?

 

[fragment7]

your mobo's bios? no, it will help sort out some pic slot problems regarding gpu/dual gpu, atleast it work with mine when i was having the same problem as yours. if you want to boot into bios, you need to press your mobo's hotkey (DEL if that works with every mobo) during initial start up

 

[TacoRye]

Thanks.

The issue I am having is that when I turn my computer on, I do not see any of the bios screen information in order to press the hot keys. Even when I press the hotkey, it doesn't display. This is all with both monitors connected via DVI.

When I unplug one of the monitors via DVI, everything displays properly.

 

[fragment7]

hmm sounds like a bug with your gpu or a settings in bios, try to boot with a dvi on one and a hdmi on the other monitor, if it still doesn't work, maybe try to boot with one monitor and change some settings in your pci devices, did you tried to move your gpu into other pci slots?