[Qemu-devel] [Bug 1597138] [NEW] Deadlock on Windows 10 pop-up

[Shannon Barber]

Public bug reported:

I was able to install and can log in but whenever a pop-up is attempted the VM 
appears to deadlock.
I can still kill -9 the process and recover but the VM and the QEmu console 
both hang with no error output.

At first I thought it was UAC but renaming a file causes a pop-up and that also 
deadlocks.
I rebuilt QEmu 2.6.0 with debug info and did a thread back-trace once the 
deadlock occurs.
See the attachment for the trace.

I am attempting to setup GPU pass-thru with a GTX 970 but this deadlock
occurs with -vga std (and no GPU pass-thru) as well.

(I cannot install or start Windows 7 but I am told this is a known bug.)

** Affects: qemu
     Importance: Undecided
         Status: New

** Attachment added: "qemu_deadlock_bt.txt"
   
https://bugs.launchpad.net/bugs/1597138/+attachment/4691950/+files/qemu_deadlock_bt.txt

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https://bugs.launchpad.net/bugs/1597138

Title:
  Deadlock on Windows 10 pop-up

Status in QEMU:
  New

Bug description:
  I was able to install and can log in but whenever a pop-up is attempted the 
VM appears to deadlock.
  I can still kill -9 the process and recover but the VM and the QEmu console 
both hang with no error output.

  At first I thought it was UAC but renaming a file causes a pop-up and that 
also deadlocks.
  I rebuilt QEmu 2.6.0 with debug info and did a thread back-trace once the 
deadlock occurs.
  See the attachment for the trace.

  I am attempting to setup GPU pass-thru with a GTX 970 but this
  deadlock occurs with -vga std (and no GPU pass-thru) as well.

  (I cannot install or start Windows 7 but I am told this is a known
  bug.)

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