On Tuesday 27 April 2010 03:07:35 Robert Hancock wrote: > On 04/26/2010 02:34 PM, Alan Stern wrote: > > On Mon, 26 Apr 2010, Ondrej Zary wrote: > >> On Monday 26 April 2010 21:17:27 Alan Stern wrote: > >>> On Mon, 26 Apr 2010, Ondrej Zary wrote: > >>>> Hello, > >>>> I'm trying to debug oops on resume from suspend-to-RAM on Asus > >>>> P4P800-VM mainboard. It crashes with invalid opcode (see below). The > >>>> kernel is 2.6.32-trunk from Debian but the same problem is present > >>>> with vanilla kernels - both newer and older (but screen remains blank > >>>> most of the time, only keyboard LEDs blink indicating an oops). > >>>> > >>>> What can cause this problem? > >>>> > >>>> 8.000339 invalid opcode: 0000 [#1] SMP > >>>> 8.003529 last sysfs file: /sys/power/state > >>>> 8.004265 Modules linked in: sco bridge stp bnep l2cacp crc16 > >>>> bluetooth rfkill loop i2c_i801 snd_intel8x0 snd_ac97_codec shpchp > >>>> ac97_bus parport_pc parport > >>>> rng_core pci_hotplug snd_pcsp snd_pcm snd_timer snd soundcore psmouse > >>>> snd_page_alloc serio_raw evdev processor ext3 jbd mbcache ide_gd_mod > >>>> ata_generic libata scsi_mod > >>>> ide_pci_generic i915 drm_kms_helper uhci_hcd drm i2c_algo_bit piix > >>>> i2c_core ehci_hcd intel_agp e100 video ide_core mii floppy agpgart > >>>> output usbcore nls_base button > >>>> thermal fan thermal_sys [last unloaded: scsi_wait_scan] > >>>> [ 148.004265] > >>>> [ 148.004265] Pid: 0, comm: swapper Not tainted (2.6.32-trunk-686 #1) > >>>> To Be Filled By O.E.M. [ 148.004265] EIP: 0060:[<c1008ff3>] EFLAGS: > >>>> 00010086 CPU: 0 > >>>> [ 148.004265] EIP is at mwait_idle+0x4e/0x6c > >>> > >>> I had exactly the same problem (on an HP computer with an Intel > >>> chipset). As far as anyone could figure out, it is caused by a bug in > >>> the BIOS. It's not entirely clear that this is the complete answer, > >>> but nothing else turned up. See > >>> > >>> http://bugzilla.kernel.org/show_bug.cgi?id=15385 > >>> > >>> for the complete record. The best solution I could find was to boot > >>> with "idle=halt" on the command line. You might check to see if any > >>> BIOS updates are available. > >> > >> Thanks, it does not crash with "idle=halt" or "idle=poll". According to > >> this: http://siyobik.info/index.php?module=x86&id=215 > >> the MWAIT instruction can be enabled/disabled in IA32_MISC_ENABLES MSR. > >> Kernel probably should enable it at boot and also on resume. > >> Here's some more info: > >> http://software.intel.com/en-us/forums/showthread.php?t=63654 > > > > That could be the answer. Clearly this should be handled by the > > arch-specific boot/setup code. I don't know enough about it, but other > > people do. > > It looks like idle=nomwait should be the workaround with the least > impact at the moment.. It does not work for me. -- Ondrej Zary _______________________________________________ linux-pm mailing list linux-pm@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linux-foundation.org/mailman/listinfo/linux-pm
