Fedora Hardware :: Config For Mobo With Onboard Graphics - AGP - Iommu - Aperture Mem Hole - GA-MA785GT-UD3H

In understanding with Fedora logs are trying to tell me and if I need to adjust some settings on my system to address these issues.

The system motherboard (Gigabyte GA-MA785GT-UD3H) has onboard graphics. I understand that some of the system RAM is taken up by the graphics subsystem.

Very occasionally, I am seeing Nautilus and some other apps crash with SIGSEGV errors. Also, on the couple of occasions, parts of the display started going black - minimising and maximising the window redrew the area as before. This appears to be to do with memory access issues. I have already tested my RAM, applied the latest BIOS update on the mobo. I'm trying to understand if this is some sort of memory access violation that is resulting from the Linux kernel going off and accessing the wrong parts of the RAM and if there is a way to tell it that the graphics and system areas of the RAM are separate, through BIOS settings or kernel parameters and such?

Some questions:

1. Is my system using AGP? I don't think so. I understand AGP is on its way out. So what does the below log output mean wrt AGP?

2. Which part of the log is actually describing the memory assignment for the graphics memory?

3. Would it be of any use trying iommu=noaperture here? I am trying this out, but I don't understand if it is helping in anyway.

Have done a Google search and read on AGP, iommu, shared memory for graphics, but their interaction with each other at the hardware level and how Fedora is handling this is not sinking into my dull brain.

I have put up the system configuration, BIOS settings, logs etc for your perusal here [url]. Parts that caught my attention are highlighted.

Now, onto the bits that has my attention:

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No AGP bridge found

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