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graphic: 0.945
virtual: 0.888
device: 0.734
PID: 0.713
files: 0.665
performance: 0.662
VMM: 0.611
ppc: 0.592
semantic: 0.590
x86: 0.590
arm: 0.549
socket: 0.545
vnc: 0.530
hypervisor: 0.502
network: 0.491
kernel: 0.489
debug: 0.463
risc-v: 0.424
architecture: 0.420
i386: 0.388
KVM: 0.371
peripherals: 0.364
mistranslation: 0.319
permissions: 0.315
TCG: 0.297
boot: 0.248
user-level: 0.245
register: 0.144
assembly: 0.094
[git]Virt-Manager cannot start any previously created virtual machine with Qemu commit bd306cfe: 'spicevmc' is not a valid char driver name
Description of problem:
With qemu built on commit bd306cfe, I'm unable to start a previously created VM.
Because of both bug #463 and #474 I was blocked from building qemu from git for something like a week or so. My last built and working Qemu is based on commit 9bef7ea9d9.
Doing a git bissect won't be an easy task :(
Steps to reproduce:
1. Build qemu using commit bd306cfe
2. Launch Virt-Manager
3. Try to launch a previously created VM or try to boot a new one.
Additional information:
Every single time I tried to launch a VM, I get a dialog box with this error message:
```
Error starting domain: internal error: qemu unexpectedly closed the monitor: 2021-07-18T07:56:50.116480Z qemu-system-x86_64: -chardev spicevmc,id=charchannel1,name=vdagent: 'spicevmc' is not a valid char driver name
Traceback (most recent call last):
File "/usr/share/virt-manager/virtManager/asyncjob.py", line 65, in cb_wrapper
callback(asyncjob, *args, **kwargs)
File "/usr/share/virt-manager/virtManager/asyncjob.py", line 101, in tmpcb
callback(*args, **kwargs)
File "/usr/share/virt-manager/virtManager/object/libvirtobject.py", line 57, in newfn
ret = fn(self, *args, **kwargs)
File "/usr/share/virt-manager/virtManager/object/domain.py", line 1329, in startup
self._backend.create()
File "/usr/lib/python3.9/site-packages/libvirt.py", line 1353, in create
raise libvirtError('virDomainCreate() failed')
libvirt.libvirtError: internal error: qemu unexpectedly closed the monitor: 2021-07-18T07:56:50.116480Z qemu-system-x86_64: -chardev spicevmc,id=charchannel1,name=vdagent: 'spicevmc' is not a valid char driver name
```
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