linux-kernel - suspend to ram regression in current GIT, bisected

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Date:	Thu, 31 Jul 2008 21:05:27 +0200
From:	Dieter Ries <clip2@....de>
To:	linux-kernel@...r.kernel.org
CC:	jbarnes@...tuousgeek.org, willy@...ux.intel.com, pavel@...e.cz,
	len.brown@...el.com, linux-pm@...ts.linux-foundation.org,
	rjw@...k.pl
Subject: suspend to  ram regression in current GIT, bisected

Hi,

starting from 2.6.27-rc1, my Laptop (Thinkpad T60) did not return from 
suspend to ram anymore.

When it should resume, the sleep LED went off, power went on, HD LED 
flashed once, but the display stayed black.

It worked perfectly in 2.6.26, so I bisected it:

ce6fce4295ba727b36fdc73040e444bd1aae64cd is first bad commit
commit ce6fce4295ba727b36fdc73040e444bd1aae64cd
Author: Matthew Wilcox <matthew@....cx>
Date:   Fri Jul 25 15:42:58 2008 -0600

PCI MSI: Don't disable MSIs if the mask bit isn't supported

David Vrabel has a device which generates an interrupt storm on the INTx
pin if we disable MSI interrupts altogether.  Masking interrupts is only
a performance optimisation, so we can ignore the request to mask the
interrupt.

Signed-off-by: Matthew Wilcox <willy@...ux.intel.com>
Signed-off-by: Jesse Barnes <jbarnes@...tuousgeek.org>

:040000 040000 391a397ab982b7b80c0cb369d8a4999d8f7319fb 
9a318bf27bf9c1bdd371e25754746397426a79ba M      drivers

Reverting it was not a problem and fixed the issue.

As the screen stays black, I have no idea how to get further details on 
that problem. Which additional information should I provide? Netconsole 
didn't show anything.

cu
Dieter

-- 
3rd Law of Computing:
         Anything that can go wr
fortune: Segmentation violation -- Core dumped

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