Dynamic resolution on Linux guest is broken

[PureTryOut]

Describe the issue

I've just updated UTM to 4.6.3 and since doing that dynamic resolution change in the guest is broken. This worked fine before and spice-vdagent is installed and running.

Configuration

• UTM Version: 4.6.3
• macOS Version: 15.1.1
• Mac Chip (Intel, M1, ...): M3

Debug log

Inside Linux spice-vdagentd is displaying some seemingly related errors:

$ cat /var/log/messages | grep spice-vdagentd
Dec  6 08:28:06 bart-macbook user.info spice-vdagentd: opening vdagent virtio channel
Dec  6 08:28:06 bart-macbook user.debug spice-vdagentd: Set max clipboard: 104857600
Dec  6 08:28:06 bart-macbook user.err spice-vdagentd: invalid message size for VDAgentMonitorsConfig
Dec  6 08:28:06 bart-macbook user.err spice-vdagentd: invalid message size for VDAgentMonitorsConfig
Dec  6 08:28:06 bart-macbook user.debug spice-vdagentd: Set max clipboard: 104857600
Dec  6 08:28:06 bart-macbook user.err spice-vdagentd: invalid message size for VDAgentMonitorsConfig
Dec  6 08:28:09 bart-macbook authpriv.notice sudo:     bart : TTY=pts/0 ; PWD=/home/bart ; USER=root ; COMMAND=/usr/sbin/spice-vdagentd --help
Dec  6 08:29:29 bart-macbook user.info spice-vdagentd: closed vdagent virtio channel
Dec  6 08:29:30 bart-macbook user.warn spice-vdagentd: no session info, max 1 session agent allowed
Dec  6 08:29:36 bart-macbook user.info spice-vdagentd: opening vdagent virtio channel
Dec  6 08:29:36 bart-macbook user.debug spice-vdagentd: Set max clipboard: 104857600
Dec  6 08:29:36 bart-macbook user.err spice-vdagentd: invalid message size for VDAgentMonitorsConfig
Dec  6 08:29:36 bart-macbook user.debug spice-vdagentd: Set max clipboard: 104857600
Dec  6 08:29:36 bart-macbook user.err spice-vdagentd: invalid message size for VDAgentMonitorsConfig
Dec  6 08:30:05 bart-macbook user.err spice-vdagentd: invalid message size for VDAgentMonitorsConfig
Dec  6 08:30:09 bart-macbook user.err spice-vdagentd: invalid message size for VDAgentMonitorsConfig
Dec  6 08:30:15 bart-macbook user.err spice-vdagentd: invalid message size for VDAgentMonitorsConfig

qemu-debug.log

[osy]

Can you try both v4.6.0 and v4.6.1 so I can figure out which update broke it?

[PureTryOut]

Actually after it didn't work the whole morning (even after several VM reboots) now it suddenly does. Nothing changed other than that I decoupled my external monitor on which the VM was showing and I'm now just working on my laptop's built-in screen.

As for upgrading or downgrading, I don't use macOS often (I rather be in the VM as long as Asahi Linux doesn't support the M3 yet 😅) so I'm not sure how to accomplish that. I've installed it as a Cask through Homebrew, can it on-demand downgrade back to another version?