Bug 7938 - [Anolis23.1][RC1][loongarch64]virt-manager 默认配置虚拟机以 spcie 显示启动后，无法切换为 vnc 显示，libvirt有报错
Summary: [Anolis23.1][RC1][loongarch64]virt-manager 默认配置虚拟机以 spcie 显示启动后，无法切换为 vnc 显示，...
Status: NEW
Alias: None
Product: Anolis OS 23
Classification: Anolis OS
Component: BaseOS Packages (show other bugs) BaseOS Packages
Version: 23.1
Hardware: loongarch Linux
: P3-Medium S3-normal
Target Milestone: ---
Assignee: happy_orange
QA Contact: bolong_tbl
URL:
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Keywords:
Depends on:
Blocks:
 
Reported: 2024-01-18 17:45 UTC by wuzhiguo
Modified: 2024-03-29 09:50 UTC (History)
2 users (show)

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Description wuzhiguo loongson_group 2024-01-18 17:45:20 UTC 
Description of problem:
virt-manager 默认配置虚拟机以 spcie 显示启动后，无法切换为 vnc 显示
libvirt 报错信息：
libvirt.libvirtError: unsupported configuration: chardev 'spicevmc' not supported without spice graphics

Version-Release number of selected component (if applicable):
kernel版本 5.10.134-16.2_rc1.an23.loongarch64
qemu版本 6.2.0-4.an23
libvirt版本 9.9.0
virt-manager版本 4.1.0

Steps to Reproduce:
1. virt-manager默认配置虚拟机以 spcie 显示启动，然后关机
2. 将 Display Spice 修改为 VNC，点击Apply

Actual results:
libvirt 报错： libvirt.libvirtError: unsupported configuration: chardev 'spicevmc' not supported without spice graphics

Expected results:
修改成功，切换为 vnc 显示

Additional info:
x86 AnolisOS-23 也有此问题
Comment 1 lixianglai loongson_group 2024-01-23 17:03:58 UTC 
问题由libvirt社区patch引入：
https://listman.redhat.com/archives/libvir-list/2022-May/231225.html

无共有问题，目前libvirt社区没有人报bug，virt-manager可以通过删除硬件
Channel(spice)
同时通过编辑xml，删除以下行
<graphics type="spice" autoport="yes">
  <listen type="address"/>
  <image compression="off"/>
</graphics>
<audio id="1" type="spice"/>
可以删除spice显示，然后再添加VNC，问题本质spice和spice audio增加删除缺少联动机制，同时libvirt有增加了spice和spice audio之间的合法性判断导致的