[SeaBIOS] Guest Reboot After Plug HDMI

[Lying]

Hello, Everybody. I encounter a problem when i using my guest.
I booting my guest without HDMI primarily, Then i add it, but my guest is be rebooted.
To know what cause it, i do it again, especially i check my guest is running normal or not with "ping" before plugging, that's well.
What i was suffer? can you help me solve it?
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