Comment 15 for bug 1934510

Hi, I had a look the list of bugs Christian added to the description. Here is my take on those.

### https://bugs.launchpad.net/ubuntu/+source/grub2/+bug/1935659

A patch exists:

https://github.com/OpenMandrivaAssociation/grub2/blob/master/grub-2.02-fuse3.patch

I couldn't spot any upstreaming effort for it. I had a look in the upstream repo, bug tracker and mailing list and apparently fuse3 isn't being considered for the moment.

The patch looks very reasonable, but better double check if it's already used in production by other distros.

As noted in the bug the src:grub2-unsigned binary packages need to be copyable back to to older releases. The packages contain only the EFI binaries, so even if the source pkg Build-Depends on libfuse, the binary packages do not.

Note: this is not the whole story:

<juliank> paride: the goal of grub2-unsigned was to be able to just binary-copy it back like shim, but then things changed because bionic needed special work

but this still seems doable to me.

Status: doable.

### https://bugs.launchpad.net/ubuntu/+source/open-vm-tools/+bug/1935665

There's an upstream PR opened by lp:~3v1n0 to address this

https://github.com/vmware/open-vm-tools/pull/544/

On 2021-10-06 upstream mentioned that they have an upstream bug report to track it, but no activity since then. The patch isn't small but it's made by several simple changes, however I would NOT feel fully confident to ship it without having it landed upstream first, especially in a LTS.

Status: waiting for upstream.

### https://bugs.launchpad.net/ubuntu/+source/s390-tools/+bug/1935666

There's a patch in active review, ETA difficult to estimate:

https://github.com/ibm-s390-linux/s390-tools/pull/117

I would be -1 for applying the patch as a delta in the Ubuntu package, especially given that upstream requested changed.

Status: waiting for upstream.

### https://bugs.launchpad.net/ubuntu/+source/snapd/+bug/1935667

Status: Fix Committed. \o/

### https://bugs.launchpad.net/ubuntu/+source/xdg-desktop-portal/+bug/1935668

In Progress, effort driven by the Desktop team, fuse3 port of the package ready for review. I think this won't be a blocker.

Status: doable.

### Final thoughts

I think we have two main blockers:

 - open-vm-tools
 - s390-tools

Both have upstream PRs pending, but it's difficult to tell when they'll be merged. Grub will need patching, but maintaining that kind of patch in the Ubuntu grub package is nothing new.

I don't have much MIR experience, but the following course of action seems reasonable to me:

 - MIR fuse3, without immediately demoting fuse2 to universe
 - Move everything we can to fuse3. This will leave open-vm-tools
   and s390-tools out for now.
 - If fuse3 support for the missing packages lands upstream before
   Jammy's feature freeze, then let's proceed with the switch to fuse3
   and demotion of fuse2. This should be our aim.
 - If the above fails, we'll have to live with two fuse implementations
   in Jammy.

I hope this helps!