In both 2.6.27-rc1 and 2.6.27-rc2, my laptop won't come out of
suspend to ram: it blinks the crescent one or twice,
and hangs. It does resume fine under 2.6.26.
I bisected the problem and got the following commit:
commit ce6fce4295ba727b36fdc73040e444bd1aae64cd
Author: Matthew Wilcox <matthew@xxxxxx>
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@xxxxxxxxxxxxxxx>
Signed-off-by: Jesse Barnes <jbarnes@xxxxxxxxxxxxxxxx>
Reverting ce6fce4295ba727b36fdc73040e444bd1aae64cd
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..
Bug added to bugzilla: http://bugzilla.kernel.org/show_bug.cgi?id=11283
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