|Summary:||MSI patch blamed for T60p not coming out of suspend to ram|
|Product:||Drivers||Reporter:||Michael S. Tsirkin (m.s.tsirkin)|
|Bug Depends on:|
Description Michael S. Tsirkin 2008-08-07 16:07:46 UTC
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 Problem Description: Starting 2.6.27-rc1, my laptop won't come out of suspend to ram: it blinks the crescent a couple of times, and hangs. 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: commit ce6fce4295ba727b36fdc73040e444bd1aae64cd Author: Matthew Wilcox <firstname.lastname@example.org> 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 <email@example.com> Signed-off-by: Jesse Barnes <firstname.lastname@example.org> 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..
Comment 1 Michael S. Tsirkin 2008-08-07 16:26:26 UTC
I'd like to clarify the note about rabases above: 12c0b20fa4afb5c8a377d6987fb2dcf353e1dce1 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.
Comment 2 Jesse Barnes 2008-08-07 17:22:42 UTC
This sounds like http://bugzilla.kernel.org/show_bug.cgi?id=11178, can you check?
Comment 3 Kevin Mitchell 2008-08-11 02:29:40 UTC
Looks like http://bugzilla.kernel.org/attachment.cgi?id=17043&action=view indeed fixes it. Had the same issue with a T60. Thanks Jesse.