id = 2637
title = "ubuntu 22.04 virtio-vga-gl notwork"
state = "opened"
created_at = "2024-10-24T05:23:19.995Z"
closed_at = "n/a"
labels = ["device:graphics", "device:virtio"]
url = "https://gitlab.com/qemu-project/qemu/-/issues/2637"
host-os = "- OS/kernel version:"
host-arch = "- QEMU flavor:"
qemu-version = "- QEMU command line:"
guest-os = "- OS/kernel version:"
guest-arch = "## Description of problem"
description = """"""
reproduce = """1.qemu-system-x86_64 \\
    -m 2048 \\
    -smp 2 \\
    -hda /home/perilla/virt/redroid.qcow2 \\
    -boot d \\
    -net nic -net user,hostfwd=tcp::1122-:22,hostfwd=tcp::19000-:9000,hostfwd=tcp::15555-:5555 \\
    -vnc :0 \\
    -device virtio-vga-gl \\
    -display sdl,gl=on \\
    -enable-kvm 

the machine can't startup normally

host console output:
qemu-system-x86_64: warning: host doesn't support requested feature: CPUID.80000001H:ECX.svm [bit 2]\\n
qemu-system-x86_64: warning: host doesn't support requested feature: CPUID.80000001H:ECX.svm [bit 2]\\n
gl_version 46 - core profile enabled\\n

after`gl_version` line, startup prograss stopped![image]

vm console output:
it seems different every startup progress

first time:

![image](/uploads/4bbdb263db3faa812aeb568e7e5d2c9f/image.png){width=764 height=467}
second time:

![image](/uploads/0d7c92b8f5b2e5241b15da1681b10eda/image.png){width=780 height=415}

2.
3."""
additional = """when I use -device virtio-gpu, it works fine 
qemu-system-x86_64 \\
    -m 2048 \\
    -smp 2 \\
    -hda /home/username/virt/redroid.qcow2 \\
    -boot d \\
    -net nic -net user,hostfwd=tcp::1122-:22,hostfwd=tcp::19000-:9000,hostfwd=tcp::15555-:5555 \\
    -vnc :0 \\
    -device virtio-gpu \\
    -display sdl,gl=on \\
    -enable-kvm \\
     -device qxl

host console output:\\n
qemu-system-x86_64: warning: host doesn't support requested feature: CPUID.80000001H:ECX.svm [bit 2]\\n
qemu-system-x86_64: warning: host doesn't support requested feature: CPUID.80000001H:ECX.svm [bit 2]\\n"""