Public bug reported:
Hi,
for quite a while we had thought enabling opengl to go along the MIR for
virglrenderer (bug 1657409), but missed that it is a prereq for using MDEVs as
well.
This now become much more important as newer drivers (recent nvidia drivers, as
well as kernel >4.16 for intel) made this much more available to users - and it
would work just fine if qemu had opengl enabled.
Other than for virgl we don't need additional libraries to be promoted to MAIN.
Those we need for "just" opengl are already in MAIN for Ubuntu Desktop support.
So the change is as easy as adding a few build-deps and setting a config option.
The code is already in place, qemu 2.11 (Bionic) has all it needs for nvidia
and 2.12 >=Cosmic has the code for Intel.
That said flipping this build option (no other change) would allow:
- >= 18.10 use vfio MDEVs for gpu's of nvidia and intel
- 18.04 use vfio MDEVs for gpu's of nvidia
- 18.04 + HWE kernel + later Cloud-Archive with qemu >2.12 use vfio MDEVs for
intel gpus
I did a bunch of tests and found no related regressions.
And in terms of SRU terms this falls clearly under "enabling new HW/Feature in
LTS" exception as the use of vfio-MDEV for gpus just wasn't as clear back then
but becomes more and more important now.
** Affects: qemu (Ubuntu)
Importance: Undecided
Status: In Progress
** Affects: qemu (Ubuntu Bionic)
Importance: Undecided
Status: Triaged
** Affects: qemu (Ubuntu Cosmic)
Importance: Undecided
Status: Triaged
** Also affects: qemu (Ubuntu Cosmic)
Importance: Undecided
Status: New
** Also affects: qemu (Ubuntu Bionic)
Importance: Undecided
Status: New
** Changed in: qemu (Ubuntu Bionic)
Status: New => Triaged
** Changed in: qemu (Ubuntu Cosmic)
Status: New => Triaged
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https://bugs.launchpad.net/bugs/1804766
Title:
Please enable opengl for acceleration and vfio-MDEV support
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