Re: PCI ACPI/IRQ-routing broken on H77 chipset + Ivy Bridge (kernel 3.5-rc7 and earlier)

Re: PCI ACPI/IRQ-routing broken on H77 chipset + Ivy Bridge (kernel 3.5-rc7 and earlier)

[Rafael J. Wysocki]

CC-ing linux-pci and Bjorn.

On Sunday, July 15, 2012, Malte Schröder wrote:
> Hello,
> this is yet another try to get someone to look at this ;)
> 
> I can't get PCI-devices to work on my DH77KC mainboard. I tested this
> using an AVM B1 ISDN card, a Fritz!PCI card and an old 3Com 905c NIC.
> I attached some dumps in case it helps. The CPU is a Core i7 3770.
> 
> PCI hardware is detected by the kernel, but it gives IRQ errors. Using
> irqpoll allows the PCI card to somewhat work, but it is unreliable.
> 
> There are some reports in Intel's support forums that also report
> PCI-problems with this mainboard, but Intel doesn't seem to be
> interested. So I hope this is something that is fixable on the kernel side.
> 
> If there is more information needed, please let me know.
> 
> 
> 

Re: PCI ACPI/IRQ-routing broken on H77 chipset + Ivy Bridge (kernel 3.5-rc7 and earlier)

[Bjorn Helgaas]

[CC +tglx]

On Sun, Jul 15, 2012 at 2:25 PM, Rafael J. Wysocki <rjw@sisk.pl> wrote:
> CC-ing linux-pci and Bjorn.
>
> On Sunday, July 15, 2012, Malte Schröder wrote:
>> Hello,
>> this is yet another try to get someone to look at this ;)
>>
>> I can't get PCI-devices to work on my DH77KC mainboard. I tested this
>> using an AVM B1 ISDN card, a Fritz!PCI card and an old 3Com 905c NIC.
>> I attached some dumps in case it helps. The CPU is a Core i7 3770.
>>
>> PCI hardware is detected by the kernel, but it gives IRQ errors. Using
>> irqpoll allows the PCI card to somewhat work, but it is unreliable.
>>
>> There are some reports in Intel's support forums that also report
>> PCI-problems with this mainboard, but Intel doesn't seem to be
>> interested. So I hope this is something that is fixable on the kernel side.
>>
>> If there is more information needed, please let me know.
>>
>>
>>
>
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Re: PCI ACPI/IRQ-routing broken on H77 chipset + Ivy Bridge (kernel 3.5-rc7 and earlier)

[Malte Schröder]

On 16.07.2012 18:14, Bjorn Helgaas wrote:

> [CC +tglx]
> 
> On Sun, Jul 15, 2012 at 2:25 PM, Rafael J. Wysocki <rjw@sisk.pl> wrote:
>> CC-ing linux-pci and Bjorn.
>>
>> On Sunday, July 15, 2012, Malte Schröder wrote:
>>> Hello,
>>> this is yet another try to get someone to look at this ;)
>>>
>>> I can't get PCI-devices to work on my DH77KC mainboard. I tested this
>>> using an AVM B1 ISDN card, a Fritz!PCI card and an old 3Com 905c NIC.
>>> I attached some dumps in case it helps. The CPU is a Core i7 3770.
>>>
>>> PCI hardware is detected by the kernel, but it gives IRQ errors. Using
>>> irqpoll allows the PCI card to somewhat work, but it is unreliable.
>>>
>>> There are some reports in Intel's support forums that also report
>>> PCI-problems with this mainboard, but Intel doesn't seem to be
>>> interested. So I hope this is something that is fixable on the kernel side.
>>>
>>> If there is more information needed, please let me know.
>>>


I was pointed to https://bugzilla.kernel.org/show_bug.cgi?id=43238.
I tried the modifications to the DSDT that where proposed there and
voilà, the 3c905c started to work :)
So it seems Intel messed up their ACPI-stuff really bad for this
mainboard. I plan to do more testing during the weekend.

-- 
Gruß
Malte Schröder
---------------------------------------------------------------------
MalteSch@gmx.de

[Bug 43238] Re: PCI ACPI/IRQ-routing broken on H77 chipset + Ivy Bridge (kernel 3.5-rc7 and earlier)

[Bjorn Helgaas]

> I was pointed to https://bugzilla.kernel.org/show_bug.cgi?id=43238.
> I tried the modifications to the DSDT that where proposed there and
> voilŕ, the 3c905c started to work :)

I don't know where to go with this.  We do have some _PRT quirks in
drivers/acpi/pci_irq.c, but since Windows 7 works fine without any
quirks, adding a quirk to Linux doesn't seem like the "right" fix.

Lubos, would it be possible for you to collect a Windows system report
using AIDA64?  I think there's a free trial version here:
http://www.aida64.com/

Maybe somebody can compare what Windows does with what Linux does and
figure out the difference.