2017-09-21 14:21:28

by Larry Finger

Subject: Re: RTL8192EE PCIe Wireless Network Adapter crashed with linux-4.13

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.

Larry

2017-09-21 14:49:59

by Kalle Valo

Subject: Re: RTL8192EE PCIe Wireless Network Adapter crashed with linux-4.13

Larry Finger <[email protected]> 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