Larry Finger <Larry.Finger@xxxxxxxxxxxx> writes: > On 09/21/2017 06:37 AM, Zwindl wrote: >> Hi, I've reported to archlinux's bugzilla, and finally found out the >> flag which caused that issue, it's the >> `CONFIG_INTEL_IOMMU_DEFAULT_ON=y` flag, I think may this is a kernel >> bug, more details at https://bugs.archlinux.org/task/55665 > > My standard kernel has the following: > > CONFIG_INTEL_IOMMU=y > # CONFIG_INTEL_IOMMU_SVM is not set > # CONFIG_INTEL_IOMMU_DEFAULT_ON is not set > > I will do some further testing to see if turning > CONFIG_INTEL_IOMMU_DEFAULT_ON also breaks my system. But not all systems have iommu so check from dmesg that iommu is really enabled. -- Kalle Valo
