Am running into strange problems when trying to passthrought my rx460 to qemu, at first there was a lot of errors, when i found out problem, i've added ivrs_ioapic[0]=00:14.0 to grub conf which partially fixed issues (now it gives io_mem error in dmesg, wihout that arg, qemu cant load passed gpu), but now when i try to start+install os on vm (using uefi bios in vm as well) it turn on monitor on that gpu but displaying like 8bit graphics with all picture in pink tone, like let's say if boot screen would be black, it's pink now and letters are yellow instead of white, boot shows up (in my case ubuntu 16.04 cuz it's only iso i got on hdd) and when i choose "trywithoutinstall" it goes pink and nothing happens (waited ~1min or less).
Am using archlinux, kernel 4.8, integrated gpu for main (to keep proper display for host) and rx460 for virt
cpu:amd a8-5600k
mb: asus a55bm-e
etc.
any help is appreciated.
Post your dmesg, etc.
Using punctuation might help too.
Sorry, even tho I think that I've found fix (forgot that I've changed few settings like chipset in vm to qt35, also i enabled uefi in mb info and seems like pink colour is gone and it boots fine arch in qemu on passedthrou gpu) and it works now, gonna download win10 and test if drivers will work. Thanks for reply anyways, seems like people here are really fast with replying. ;)