Bug 1377011

Summary:	AMD IOMMU blocks function of Via VL805 USB 3.0 chipset in F25-A2
Product:	[Fedora] Fedora	Reporter:	bob <redzilla.coralnut>
Component:	kernel	Assignee:	Kernel Maintainer List <kernel-maint>
Status:	CLOSED INSUFFICIENT_DATA	QA Contact:	Fedora Extras Quality Assurance <extras-qa>
Severity:	unspecified	Docs Contact:
Priority:	unspecified
Version:	25	CC:	gansalmon, ichavero, itamar, jonathan, kernel-maint, madhu.chinakonda, mchehab
Target Milestone:	---	Flags:	jforbes: needinfo?
Target Release:	---
Hardware:	x86_64
OS:	Linux
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Fixed In Version:		Doc Type:	If docs needed, set a value
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Clone Of:		Environment:
Last Closed:	2017-04-28 17:07:04 UTC	Type:	Bug
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
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oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description bob 2016-09-17 13:10:10 UTC

Description of problem:

This is an AMD specific problem.

When IOMMU is enabled in BIOS and F25-A2 is booted on an AMD 970 chipset, the recognition of the VIA VL805 chipset for USB 3.0 is prevented.  The USB 3.0 ports on the motherboard provided by the VL 805 chipset are non-functional but the USB 2.0 ports provided by the AMD 970 southbridge work fine.

When IOMMU is disabled in BIOS the VL805 chipset is properly recognized and the USB 3.0 ports are functional.

Problem also reported on F21 through F24, Ubuntu and Mint, where users must disable IOMMU to gain USB 3.0 port functionality.

Version-Release number of selected component (if applicable):

Fedora 25 Alpha 2 Workstation Live DVD

How reproducible:

Always

Steps to Reproduce:

1. Toggle status of IOMMU between on/off in BIOS
2. Boot F25-A2 Live DVD
3. VIA VL803 chipset's USB 3.0 ports are dead if IOMMU enabled.

Actual results:


Expected results:


Additional info:

CPU = AMD FX-8350
Motherboard = Gigabyte GA-970A-UD3P
Chipset = AMD 970

This bug was initially filed for F21 but expired end of life without being fixed: Bug 1188654

This bug is currently open as Bug 1376455 in F24

Comment 1 Justin M. Forbes 2017-04-11 14:35:36 UTC

*********** MASS BUG UPDATE **************

We apologize for the inconvenience.  There is a large number of bugs to go through and several of them have gone stale.  Due to this, we are doing a mass bug update across all of the Fedora 25 kernel bugs.

Fedora 25 has now been rebased to 4.10.9-200.fc25.  Please test this kernel update (or newer) and let us know if you issue has been resolved or if it is still present with the newer kernel.

If you have moved on to Fedora 26, and are still experiencing this issue, please change the version to Fedora 26.

If you experience different issues, please open a new bug report for those.

Comment 2 Justin M. Forbes 2017-04-28 17:07:04 UTC

*********** MASS BUG UPDATE **************
This bug is being closed with INSUFFICIENT_DATA as there has not been a response in 2 weeks. If you are still experiencing this issue, please reopen and attach the 
relevant data from the latest kernel you are running and any data that might have been requested previously.