Bug#701620: linux-image-3.2.0-4-amd64: Unable to use PCI cards on Intel DZ77SL50K motherboard (likely any Z77 board)

[szabolcs <szabolcs@cohortor.org>]

Hello Ben,

@VT-d:
My CPU (i3-3220T), does not support VT-d. I also see no such option in
the BIOS. VT-x however is enabled.

@/proc/cmdline
BOOT_IMAGE=/boot/vmlinuz-3.8.0
root=UUID=aa6e008e-1ec9-4220-8ae9-9d39e8b469d4 ro quiet

The cmdline looks the same with the stock 3.2 kernel too, except of
course for the kernel image file.

Thank you for your attention,

-szabolcs


On Mon, Feb 25, 2013 at 1:52 PM, Ben Hutchings <ben@decadent.org.uk> wrote:
> Control: tag -1 moreinfo
>
> On Mon, 2013-02-25 at 12:45 +0100, szabolcs wrote:
>> Package: src:linux
>> Version: 3.2.35-2
>> Severity: important
>> Tags: upstream
>>
>> Dear Maintainer,
>>
>> I am unable to use any of my PCI slots of my new motherboard (a recent HW
>> upgrade). Tested with two PCI network cards (1. Atheros chip based WiFi card I
>> used with my previous mobo for WiFi AP, and 2. a 3Com NIC) placed repeatedly in
>> different PCI slots. The results were always the same:
>>
>> 1. during boot the kernel loads the appropriate modules (e.g. 3c59x), all
>> appears to look just fine in dmesg.
>>
>> 2. unless I bring the interfaces associated with the network cards up,
>> everything works as expected.
>>
>> 3. the moment I issue the 'ifup ethX' command, the following is printed in
>> /var/log/syslog:
> [...]
>
> Is the IOMMU (also known as VT-d) enabled in the BIOS settings?
> What is the kernel command line (/proc/cmdline)?
>
> Ben.
>
> --
> Ben Hutchings
> Absolutum obsoletum. (If it works, it's out of date.) - Stafford Beer