FYI https://passthroughpo.st/psa-5-1-kernel-glitching-and-crashes-in-passthrough/
Le mer. 31 juil. 2019 à 15:42, José Ramón Muñoz Pekkarinen < [email protected]> a écrit : > On Sun, 21 Jul 2019 at 21:59, Zoltán Kővágó <[email protected]> > wrote: > > > > Hi, > > > > Recently my previously perfectly working GPU passthrough setup (with a > > win8.1 x64 guest with OVMF) started to malfunction in various ways: > > screen randomly turned off for a few seconds, BSOD with > > VIDEO_TDR_FAILURE, 3d apps randomly crashing, not drawing the windows' > > content, and graphical glitches (for example in furmark the OSD text > > flickers). > > > > After fiddling around with various qemu versions, nvidia driver versions > > on the guest, I figured out that with a linux 5.0 kernel it works fine, > > but with 5.1 it randomly fails. I bisected it and it looks like the > > culprit is the commit 4e103134b862 "KVM: x86/mmu: Zap only the relevant > > pages when removing a memslot"[1]. I tried to revert in on top of 5.2.1 > > but too many things changed in the meantime. Anyway, if I replace the > > body of kvm_mmu_invalidate_zap_pages_in_memslot with > > kvm_mmu_zap_all(kvm); it works again (probably with horrible performance > > degradation). > > > > Did anyone experience anything like this? I'm using Alex's ACS override > > patch, maybe it violates some assumption that the new code has? > > Hi, > > I noticed some changes that made 5.0 not working well when > detecting screen speakers through hdmi, but this I didn't see anytime. > My problem flew away with 5.1.15(the one I currently use), and no > other spread. I never needed the ACS override patch in my setup, > what happen if you try without it, does your groups comes wrong in > any ways? > > Best regards. > > José. > > _______________________________________________ > vfio-users mailing list > [email protected] > https://www.redhat.com/mailman/listinfo/vfio-users >
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