https://bugzilla.kernel.org/show_bug.cgi?id=177791 Bug ID: 177791 Summary: screen flickering with intel_iommu=on Product: Virtualization Version: unspecified Kernel Version: 4.8 Hardware: Intel OS: Linux Tree: Mainline Status: NEW Severity: normal Priority: P1 Component: kvm Assignee: virtualization_kvm@xxxxxxxxxxxxxxxxxxxx Reporter: v@xxxxxxxxxx Regression: No Hello, I have found a strange bug with IOMMU: when I enable the IOMMU and put the mouse cursor at any width on 885'th or 1019'th pixel from the top, the screen glitches appear, like flickering or tearing. It's difficult to explain, please see the videos: IOMMU enabled: http://robolab.it/iommu/iommu_on.mp4 (28M) IOMMU disabled: http://robolab.it/iommu/iommu_off.mp4 (3.7M) The bug appears with Linux 4.7.6, 4.7.7, 4.8.0 and 4.8.1. I have not tried the current releases (4.8.2 and 4.7.8) yet. System: Clevo P640RE laptop with Intel Core i7-6700HQ CPU OS: openSuSE 13.2 x86_64 -- You are receiving this mail because: You are watching the assignee of the bug. -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
