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Subject: RE: 2.6.16-rc4: known regressions
Date: Wed, 22 Feb 2006 14:55:10 +0800
Message-ID: <3ACA40606221794F80A5670F0AF15F840B020D85@pdsmsx403>
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Thread-Topic: 2.6.16-rc4: known regressions
thread-index: AcY3XpsIVePxNjCpSNq19gi+YdIOrwAGs0Zg
From: "Yu, Luming" <luming.yu@intel.com>
To: "Adrian Bunk" <bunk@stusta.de>
Cc: "Linus Torvalds" <torvalds@osdl.org>, "Andrew Morton" <akpm@osdl.org>,
       "Linux Kernel Mailing List" <linux-kernel@vger.kernel.org>,
       "Sanjoy Mahajan" <sanjoy@mrao.cam.ac.uk>,
       "Brown, Len" <len.brown@intel.com>, <linux-acpi@vger.kernel.org>
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> >Subject    : S3 sleep hangs the second time - 600X
>> >References : http://bugzilla.kernel.org/show_bug.cgi?id=5989
>> >Submitter  : Sanjoy Mahajan <sanjoy@mrao.cam.ac.uk>
>> >Status     : problematic commit identified,
>> >             further discussion is in the bug
>> 
>> The real problem is there are some bugs hidden by ec_intr=0.
>> ec_intr=1 just get these bug  just exposed, and we need to fix them. 
>
>>From a users' point of view, these are regressions from 
>2.6.15, and not 
>all of them might be fixed in time for 2.6.16.
>
>What is a possible short term solution/workaround for 2.6.16?

ec_intr=0 is a reasonable workaround for this box,
if we couldn't root-cause and fix the real problem on time.

>Can we go back to default to polling mode in 2.6.16?
>

No, don't do this.  There are other laptops need this. And I didn't
get regression report that is root-caused to enabling ec_intr=1 by
default. If you argue bug 5989, 6075 could be,  I think
the truth is, for 5989, we need to fix thermal and processor driver
issue.
for 6075, we need to fix interrupt issue.

So far, I don't think we need o fall back.

Thanks,
Luming

.