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halogene

Member

Registered: 2013-05-29

Posts: 69

[solved] qemu guest agent won't start

Recently the qemu guest agent stopped working in my VM running Windows 8.1. I have installed all current drivers (and the current qemu-ga) from the virtio-win iso image, especially the vioserial which seems to be precondition for qemu-ga to run as it uses the serial interface. When running the qemu-ga from console, I get the following:

<timestamp>: critical: error opening path
<timestamp>: critical: error opening channel
<timestamp>: critical: failed to create guest agent channel
<timestamp>: critical: failed to initialize guest agent channel

I believe that this has started to occurr either after upgrade to kernel 4.6.2 or to qemu version 2.6 (more likely the latter). In any case, I have been happily using qemu-ga's features without problems previously.

Any ideas where I could start to investigate? I haven't found anything useful on this topic via web search...

Last edited by halogene (2016-07-04 20:50:34)

halogene

Member

Registered: 2013-05-29

Posts: 69

Re: [solved] qemu guest agent won't start

Heh. Somehow the channel for qemu-ga got lost from my VM, and I overlooked to re-add it. So I was able to fix it by adding a channel via virt-manager with the target org.qemu.guest_agent.0 .