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SubjectRe: Subject: [v3.19 Regression] x86, irq, acpi: Get rid of special handling of GSI for ACPI SCI
On 2015/7/15 1:22, Joseph Salisbury wrote:
> On 07/13/2015 10:42 PM, Jiang Liu wrote:
>> On 2015/7/14 3:36, Joseph Salisbury wrote:
>>> Hello Jiang,
>>>
>>> A kernel bug report was opened against Ubuntu [0]. It was found that
>>> reverting the following commit resolves this bug:
>>>
>>> commit cd68f6bd53cf89d1d5ed889b8af65e9c3574a079
>>> Author: Jiang Liu <jiang.liu@linux.intel.com>
>>> Date: Mon Oct 27 16:11:52 2014 +0800
>>>
>>> x86, irq, acpi: Get rid of special handling of GSI for ACPI SCI
>>>
>>> The regression was introduced as of v3.19-rc1.
>>>
>>> I was hoping to get your feedback, since you are the patch author. Do
>>> you think gathering any additional data will help diagnose this issue,
>>> or would it be best to submit a revert request?
>> Hi Joseph,
>> Sorry for the trouble. It would be great if we could get
>> more information about the bug, such as bug report info, dmesg and
>> acpidump from the reporting system.
>> Thanks!
>> Gerry
> Comments 3 and 4 have the requested information in the bugzilla bug:
> https://bugzilla.kernel.org/show_bug.cgi?id=101301
>
> Thanks again for the help!
Hi Joseph,
According to my investigation, it's an ACPI BIOS issue instead
of a kernel bug. But it's actually a regression. Now we enforce stricter
check for ACPI SCI interrupt, which exposes an implementation flaw in
the virtual BIOS.

I have posted the analysis at
https://bugzilla.kernel.org/show_bug.cgi?id=101301
But I have no account at launchpad, so could you please help to copy
the message to launchpad?
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1440072

Thanks!
Gerry


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