tag:blogger.com,1999:blog-8694303781453133223.post1234388201492125157..comments2023-12-12T08:07:13.883-07:00Comments on VFIO tips and tricks: What's the deal with VGA arbitration?Alex Williamsonhttp://www.blogger.com/profile/02071923591707250496noreply@blogger.comBlogger3125tag:blogger.com,1999:blog-8694303781453133223.post-3350357118375845252016-01-19T20:36:47.987-07:002016-01-19T20:36:47.987-07:00As I replied to your other comment, laptops are no...As I replied to your other comment, laptops are not likely to work. Optimus support is highly integrated into the system BIOS in ways that we have no idea how to duplicate. I don't think it's likely to help, but the i915 vga arbiter patch is necessary any time you have host Intel graphics and make use of the x-vga=on option.Alex Williamsonhttps://www.blogger.com/profile/02071923591707250496noreply@blogger.comtag:blogger.com,1999:blog-8694303781453133223.post-25318268970608268602016-01-19T19:41:06.146-07:002016-01-19T19:41:06.146-07:00On the FAQ, question 3: https://vfio.blogspot.co.n...On the FAQ, question 3: https://vfio.blogspot.co.nz/2014/08/vfiovga-faq.html<br />"I have Intel host graphics, when I start the VM I don't get any output on the assigned VGA monitor and my host graphics are corrupted. I also see errors in dmesg indicating unexpected drm interrupts."<br /><br />You mention to use the patch, this is for VMs using SeaBIOS right? Is it always required? I've been trying to get this working on a laptop that meets all hardware requirements but lacks the EFI vbios support on the nvidia 860M, so OVMF is not an option from what I understand. From what I can tell the HDMI and VGA ports also belong to the Intel IGP, but VNC should still be an option correct?<br /><br />When using SeaBIOS I'm able to install Windows and see my gpu listed as "3D Video Controller" in Device Manager reporting Code 28, nvidia drivers refuse to install though. <br /><br />I've not applied the patch you mention as I'm not experiencing these issues your talking about, there is no graphic corruption and no relevant errors in dmesg. Is the situation with laptops different here due to the hardware setup where often the nvidia/amd gpu output is handled via Intel?<br /><br />I'm having difficulty understanding what is wrong with my setup since the gpu does appear to be passed through to the VM. I have not had much luck finding anything about passthrough with Code 28, I could only wish it were Code 43 :) Would you be able to clarify what's wrong? I can only assume it has something to do with laptop hardware design being different from desktops.<br /><br />I have more details on my specific setup here: https://www.reddit.com/r/VFIO/comments/41ohss/laptop_with_nvidia_gpu_passed_through_but_cannot/Brennanhttps://www.blogger.com/profile/01883832595973267859noreply@blogger.comtag:blogger.com,1999:blog-8694303781453133223.post-30437192452764323982015-09-24T16:20:46.967-06:002015-09-24T16:20:46.967-06:00Can you repost the slides? The link seems to be go...Can you repost the slides? The link seems to be gone ):Anonymoushttps://www.blogger.com/profile/02942305605007045769noreply@blogger.com