Hi，<div>I have encountered the same situation . <div class="gmail_quote">2012/5/29 Charles.Tsai-蔡清海-研究發展部 <<a href="mailto:charles.tsai@cloudena.com" target="_blank">charles.tsai@cloudena.com</a>> <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"> <div lang="EN-US" link="blue" vlink="purple"> <div> Bug description: A  sever bug  was found on 64-bit Windows 7 VM which crashed after running idle for a while(~ 2-3 hours). When we checked the kvm process, it was killed from the system.   Drivers installed:                 Qxl,                 Virtioserail                 Vdagent   Qemu & Spice:       Hans’s Qemu + "spice-0.10.tar.gz"   Steps to reproduce: 1.       Create a 64-bit Windows 7 VM image 2.       Install qxl, virioserai driver and vdagent 3.       Launch the VM and let it run idle 4.       After a couple of hours, the VM will crash   Memory demp information:   0: kd> !analyze -v ******************************************************************************* *                                                                             * *                        Bugcheck Analysis                                    * *                                                                             * *******************************************************************************   DRIVER_POWER_STATE_FAILURE (9f) A driver is causing an inconsistent power state. Arguments: Arg1: 0000000000000003, A device object has been blocking an Irp for too long a time Arg2: fffffa8003bb24b0, Physical Device Object of the stack Arg3: fffff80003bd3518, Functional Device Object of the stack Arg4: fffffa80025e9510, The blocked IRP   Debugging Details: ------------------     DRVPOWERSTATE_SUBCODE:  3   IRP_ADDRESS:  fffffa80025e9510   DEVICE_OBJECT: fffffa8003bb24b0   DRIVER_OBJECT: fffffa8003a1ac70   IMAGE_NAME:  vioser.sys   DEBUG_FLR_IMAGE_TIMESTAMP:  4fc31b19   MODULE_NAME: vioser   FAULTING_MODULE: fffff88003670000 vioser   DEFAULT_BUCKET_ID:  VISTA_DRIVER_FAULT   BUGCHECK_STR:  0x9F   PROCESS_NAME:  System   CURRENT_IRQL:  2   LAST_CONTROL_TRANSFER:  from fffff80002930e53 to fffff800028c3040   STACK_TEXT:  fffff800`03bd34c8 fffff800`02930e53 : 00000000`0000009f 00000000`00000003 fffffa80`03bb24b0 fffff800`03bd3518 : nt!KeBugCheckEx fffff800`03bd34d0 fffff800`028cf0e6 : fffff800`03bd3600 fffff800`03bd3600 00000000`00000001 00000000`00000000 : nt! ?? ::FNODOBFM::`string'+0x28e30 fffff800`03bd3570 fffff800`028ce396 : fffff800`02a72700 00000000`00034df1 00000000`00000000 00000000`00000000 : nt!KiProcessTimerDpcTable+0x66 fffff800`03bd35e0 fffff800`028cf00e : 00000007`ddaba240 fffff800`03bd3c58 00000000`00034df1 fffff800`02a410a8 : nt!KiProcessExpiredTimerList+0xc6 fffff800`03bd3c30 fffff800`028ce707 : 00000059`a9892fc1 00000059`00034df1 00000059`a9892fbb 00000000`000000f1 : nt!KiTimerExpiration+0x1be fffff800`03bd3cd0 fffff800`028cb77a : fffff800`02a3ce80 fffff800`02a4ac40 00000000`00000000 fffff880`00c3ef44 : nt!KiRetireDpcList+0x277 fffff800`03bd3d80 00000000`00000000 : fffff800`03bd4000 fffff800`03bce000 fffff800`03bd3d40 00000000`00000000 : nt!KiIdleLoop+0x5a     STACK_COMMAND:  kb   FOLLOWUP_NAME:  MachineOwner   FAILURE_BUCKET_ID:  X64_0x9F_IMAGE_vioser.sys   BUCKET_ID:  X64_0x9F_IMAGE_vioser.sys   Followup: MachineOwner ---------   0: kd> lmvm vioser start             end                 module name fffff880`03670000 fffff880`03680000   vioser     (private pdb symbols)  d:\localsymbols\vioser.pdb     Loaded symbol image file: vioser.sys     Image path: \SystemRoot\system32\DRIVERS\vioser.sys     Image name: vioser.sys     Timestamp:        Mon May 28 14:28:41 2012 (4FC31B19)     CheckSum:         0000F577     ImageSize:        00010000     Translations:     0000.04b0 0000.04e4 0409.04b0 0409.04e4   0: kd> !devobj fffffa8003bb24b0 f Device object (fffffa8003bb24b0) is for: vport0p1 \Driver\VirtioSerial DriverObject fffffa8003a1ac70 Current Irp 00000000 RefCount 1 Type 0000001b Flags 0000304c Dacl fffff9a100232a11 DevExt fffffa8003badbc0 DevObjExt fffffa8003bb2620 DevNode fffffa8003bbfb30 ExtensionFlags (0000000000)  Device queue is not busy.   0: kd> !irp fffffa80025e9510 Irp is active with 2 stacks 1 is current (= 0xfffffa80025e95e0) No Mdl: No System Buffer: Thread 00000000:  Irp stack trace.       cmd  flg cl Device   File     Completion-Context >[ 16, 2]   0 e1 fffffa8003bb24b0 00000000 fffff800028ad990-fffffa8002b61ce0 Success Error Cancel pending                \Driver\VirtioSerial   nt!IopUnloadSafeCompletion                                         Args: 00014400 00000001 00000004 00000002 [  0, 0]   0  0 00000000 00000000 00000000-fffffa80027e32e0                                              Args: 00000000 00000000 00000000 00000000                   </div> </div> _______________________________________________ Spice-devel mailing list <a href="mailto:Spice-devel@lists.freedesktop.org">Spice-devel@lists.freedesktop.org</a> <a href="http://lists.freedesktop.org/mailman/listinfo/spice-devel" target="_blank">http://lists.freedesktop.org/mailman/listinfo/spice-devel</a> </blockquote></div> </div>