Date:	Fri, 10 Jul 2009 16:10:05 -0600
From:	Bjorn Helgaas <bjorn.helgaas@...com>
To:	Andreas Sundstrom <sunkan@...pa.cx>
Cc:	linux-kernel@...r.kernel.org, Frans Pop <elendil@...net.nl>
Subject: Re: 2.6.30 kernel panic when closing lid

On Friday 19 June 2009 02:22:00 pm Andreas Sundstrom wrote:
> My laptop has started crashing when I close the lid. This does not
> happen with 2.6.29.4 which I was using before 2.6.30, ...

I opened a bugzilla for this regression:
  http://bugzilla.kernel.org/show_bug.cgi?id=13751

If either of you can test the suggestions in comment #12 of the
bugzilla, I'd like to try to fix this oops.

Thanks!
  Bjorn

> I have tried to catch the full output with a USB serial console, but
> it's not able to send the full output before it dies it seems. Sometimes
> it gets further than other times.
> 
> Here is one oops/panic:
> [   31.295898] kernel tried to execute NX-protected page - exploit
> attempt? (uid: 0)
> [   31.296575] BUG: unable to handle kernel paging request at
> ffff88013a891630
> [   31.297233] IP: [<ffffffff814f6940>] fair_sched_class+0x0/0xc0
> [   31.297594] PGD 202063 PUD b067 PMD 800000013a8001e3
> [   31.298567] Oops: 0011 [#1] SMP
> [   31.298569] last sysfs file:
> /sys/devices/pci0000:00/0000:00:1c.1/0000:10:00.0/firmware/0000:10:00.0/loading
> [   31.298572] CPU 1
> [   31.298574] Modules linked in: iscsi_tcp libiscsi_tcp libiscsi
> scsi_transport_iscsi sbp2 btusb sdhci_pci sdhci bluetooth psmouse
> ricoh_mmc ohci1394 mmc_core ieee1394 pl2303
> [   31.298585] Pid: 0, comm: swapper Not tainted 2.6.30 #9 HP Compaq
> 6910p (GB949ET#AK8)
> [   31.298587] RIP: c2c0:[<ffffffff814f6940>]  [<ffffffff814f6940>]
> fair_sched_class+0x0/0xc0
> [   31.298592] RSP: ffffffff8102e891:ffff88013b9a1b20  EFLAGS:
> ffff88013b8c4a80
> [   31.298594] RAX: ffffffff81030f1a RBX: ffffffff810b047b RCX:
> ffffffff8123d135
> [   31.298597] RDX: ffff88013b976580 RSI: 0000000000000001 RDI:
> ffff88013b8c4a80
> [   31.298599] RBP: ffffffff810303a2 R08: ffff88013b9a1ae0 R09:
> ffff88002804c2c0
> [   31.298601] R10: ffff88013b9765b8 R11: ffff88002804c328 R12:
> ffff88013b9a1ab0
> [   31.298603] R13: 0000000000000001 R14: 0000000000000001 R15:
> ffff88002804c328
> [   31.298606] FS:  000000[   31.319076] bad: scheduling from the idle
> thread!
> [   31.319[   31.320577] Call Trace:
> [   31.321325] bad: scheduling from the idle thread!
> [   31.322044] Pid: 0, comm: swapper Tainted: [   31.322805] Call Trace:
> [   31.323568] bad: scheduling from the idle thread!
> [   31.324318] Pid: 0, comm: swapper Tainted: G      D    2.6.30 #9
> [   31.325028] Call Trace:
> 
> I did a few runs and the full output from that is here:
> http://pastebin.com/fe18c31c
> 
> fair_sched_class seems to be mentioned every time from what I've seen.
> 
> I also tried removing "button" support from ACPI and that seems to
> eliminate the problem, so I have a workaround.
> Compiling "button" as a module does not seem to eliminate the problem
> though even with the module blacklisted (and not loaded then of course).
> 
> This is on a HP Compaq 6910p as you might have seen in the oops/panic
> output.
> I don't know how to proceed on troubleshooting/debugging this.
> 
> Let me know if there is anything I can do to help find the issue.
> 
> P.S. I'm currently not subscribed so please feel free to CC me on any
> posts regarding
> this.
> 
> /Andreas Sundstrom
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