Re: Bug#779919: usb-modeswitch: IOMMU in BIOS not handled properly
reassign -1 linux 3.16.7-ckt4-3
Le vendredi, 6 mars 2015, 07.35:44 William Melgaard a écrit :
> Dear Maintainer,
>
> * What led up to the situation?
> The default IOMMU setting in the BIOS for a GIGABYTE motherboard is
> off. Attempting to install a Debian system (Wheezy or Jessie AMD-64)
> with this setting results in not recognizing USB mouse or keyboard.
> However, booting with Squeeze or Wheezy 386 does work with this
> setting.
> * What exactly did you do (or not do) that was effective (or
> ineffective)?
> Turned on the IOMMU support
> * What was the outcome of this action?
> Although the USB-2 mouse and keyboard are dealt with effectively with
> IOMMU enabled, there are ~550 lines of "page fault" reported by dmesg
> at bootup. Further investigaiton finds that failure to access the
> northbridge (AMD 970 chip) USB-3 support is the cause of the page
> faults.
> * What outcome did you expect instead?
> Everything to work
This has most likely nothing to do with usb-modeswitch, which doesn't
handle the USB devices itself, but only ever through the Linux kernel.
Hereby reassigning.
Cheers, OdyX
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