[Bug 1795857] Re: enable CONFIG_DRM_BOCHS

[Christian Ehrhardt ]

Thanks cascardo for testing power8 already.

This came up in bug 1823152 as well and made me aware of this.
If qemu is not run in commandline most frontends set something else than "-vga std" therefore I wasn't aware. But I can confirm seeing the issue.

I think I can test x86 quite easily, is there a PPA to test this?
Actually everyone can:
1. sudo qemu-img create /var/lib/libvirt/images/xubuntu18_04.qcow2 15G
2. sudo qemu-system-x86_64-spice -enable-kvm -cpu host -boot d -cdrom ~/Downloads/xubuntu-18.04.2-desktop-amd64.iso /var/lib/libvirt/images/xubuntu18_04.qcow2 -m 8G
3. sudo qemu-system-x86_64-spice -enable-kvm -cpu host /var/lib/libvirt/images/xubuntu18_04.qcow2 -m 8G

#3 fails with the default, set "-vga qxl" and you have a working guest.
For mass testing you can do the install in #2 once and then just copy around the image file to boot e.g. under different Hosts versions.


OTOH - I'm not sure I can speak for all potential implications as the kmod header reads like:
"# Framebuffer drivers are generally buggy and poorly-supported, and cause
# suspend failures, kernel panics and general mayhem.  For this reason we
# never load them automatically."
I won't test e.g. suspend on all of them and/or might it be an issue on bare metal or on real Bochs?

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https://bugs.launchpad.net/bugs/1795857

Title:
  enable CONFIG_DRM_BOCHS

Status in kmod package in Ubuntu:
  Confirmed
Status in linux package in Ubuntu:
  Incomplete
Status in kmod source package in Disco:
  Confirmed
Status in linux source package in Disco:
  Incomplete

Bug description:
  CONFIG_DRM_BOCHS got disabled for
  https://bugs.launchpad.net/ubuntu/+source/kmod/+bug/1378648

  but doing so regressed running qemu with the 'std' VGA driver, where
  it'd fail to start X after install, as mentioned on bug 1794280

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