Latest working kernel version: 2.6.26
Earliest failing kernel version: 2.6.27-rc1
Distribution: ubuntu gutsy
Hardware Environment: T60p
Software Environment: gutsy install with full disk encryption
Starting 2.6.27-rc1, my laptop won't come out of
suspend to ram: it blinks the crescent a couple of times,
I bisected the problem to the following merge:
bad: [1d9b9f6a53d77ed801ba875f937d6dabbfc381ce] Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci-2.6
I then played with rebase (rebase instead of merge)and got to this commit:
Author: Matthew Wilcox <email@example.com>
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
Signed-off-by: Matthew Wilcox <firstname.lastname@example.org>
Signed-off-by: Jesse Barnes <email@example.com>
fixes resume from suspend to RAM for me.
Steps to reproduce:
Press Fn-F4 to suspend, press Fn to resume.
This works on 2.6.26, hangs on vanilla 2.6.27-rc1
and 2.6.27-rc2, works on 2.6.27-rc2 with reverted ce6fce..
I'd like to clarify the note about rabases above:
by itself resumed for me once, and hung once.
The problem seems to be more pronounced (easier to reproduce)
when applied on top of a3ad7f128c637b7612ebeacb1f85fec933bb1195.
This sounds like http://bugzilla.kernel.org/show_bug.cgi?id=11178, can you check?
Looks like http://bugzilla.kernel.org/attachment.cgi?id=17043&action=view indeed fixes it. Had the same issue with a T60. Thanks Jesse.
*** This bug has been marked as a duplicate of bug 11178 ***