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  1. RHEL
  2. RHEL-45158

text console via virtio-gpu is not working on s390x anymore

    • kernel-5.14.0-486.el9
    • Yes
    • Critical
    • CustomerScenariosInitiative
    • 1
    • rhel-sst-virtualization-hwe
    • ssg_virtualization
    • 20
    • 26
    • 200
    • False
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    • None
    • zKVM CY24Q3
    • s390x
    • None

      What were you trying to do that didn't work?

      Connect to the guest console via virtio-gpu

      Please provide the package NVR for which bug is seen:

      guest kernel 5.14.0-467
      host kernel 5.14.0-460

      How reproducible:

      100%

      Steps to reproduce

      1. Set up a VM with virtio-gpu (but without an actual desktop environment), e.g.
        # virt-install --import --disk <installed-qcow2> --os-variant rhel9-unknown --name latest_rhel9 --memory 2048 --vcpus 2  --graphics vnc,listen=0.0.0.0 --input keyboard,bus=virtio --input tablet,bus=virtio --name rhel9
      2. Use VNC or virt-viewer to connect to the guest console

      Expected results

      The text console is displayed

      Actual results

      The session doesn't receive any graphics

      Additional notes

      thuth@redhat.com reported this. He already narrowed down the affected kernel version: up to 5.14.0-464 the console is still shown, since then not.

      Note that this only affects the text console, if the guest has a working desktop environment the graphics still work as expected. In that case the issue can be reproduced by stopping the gdm daemon.

      This was hit on s390x. I'll ask for help to reproduce this on other archs.

        1. after_fix_kernel-5.14.0-473.4645_1358747575.png
          16 kB
          Leo Fu
        2. before_fix_kernel-5.14.0-480.png
          8 kB
          Leo Fu
        3. black_screen_from_vnc.png
          11 kB
          Liang Cong
        4. info_from_virsh_console.png
          112 kB
          Liang Cong
        5. screenshot-1.png
          9 kB
          Sebastian Mitterle

              thuth@redhat.com Thomas Huth
              smitterl@redhat.com Sebastian Mitterle
              IBM Confidential Group
              Thomas Huth Thomas Huth
              Leo Fu Leo Fu
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                Created:
                Updated:
                Resolved: