[Bug 1888169] Re: Cinnamon segfault at 28 ip 00007fb707b32ae2 sp 00007ffd444e3780 error 6 in libmuffin.so.0.0.0[7fb707afe000+74000]

[Łukasz Zemczak]

Ok, the debdiff looked fine, sponsored to the focal-proposed Unapproved queue. Two things to note:
 * Since I have sponsored the upload, I cannot review it from the queue, so you need to find someone else from the SRU team to process your upload
 * The regression potential field needs a bit more work for this to follow the Ubuntu SRU guidelines. The regression potential section should be filled in with regression potential analysis coming from the new change that is being uploaded. So, look at the code and think "what might go wrong if there is a *bug* in the changes I'm introducing". Or, even better, "if this code was to cause a regression somewhere, where would that be?". This way the SRU team can better understand the risks of including this in the stable series + when something breaks, we can more easily identify which change could have caused it. Could you update the section with that in mind?

Cheers.

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Title:
  Cinnamon segfault at 28 ip 00007fb707b32ae2 sp 00007ffd444e3780 error
  6 in libmuffin.so.0.0.0[7fb707afe000+74000]

Status in muffin package in Ubuntu:
  Fix Released
Status in muffin source package in Focal:
  In Progress

Bug description:
  This is an upstream issue-read the following bug reports.

  https://github.com/linuxmint/cinnamon/issues/9401
  https://github.com/linuxmint/cinnamon/issues/9468

  I will shortly publish a patch/debdiff to allow for possible SRU.

  This is a REGRESSION of a commit in Cinnamon 4.0.0
  (https://github.com/linuxmint/muffin/commit/1d38120c9ded2578a14cb2e8bf46bb82b3acdc75)

  SRU TEMPLATE:

  [Impact]

   * In fallback mode Cinnamon/Muffin segfaults and makes the desktop unusable.
   
   * This would occur by having two monitors-a laptop and an external with the laptop off and the external on-supposedly with NVIDIA as a driver.
  [Test Case]
   
   * Upstream commits example to replicate bug:
   "Example to reproduce: Laptop monitor + external monitor.  Arrange laptop
   monitor to the right of the external one.  Using nvidia-450 (confirmed
   for me, at least), turn laptop monitor off.  Ignoring horrible lag from
   driver, turn the laptop monitor back on (arranging it still to the right
   of the external monitor)."

  [Regression Potential]

   * This is actually a SOLVE of a regression-I'd task this at medium
  priority.

   * This regression fix goes back to Cinnamon 4.0.0-or when Eoan Ermine
  was released by getting refresh rates form xrandr

   * In upstream Mint this was an SRU/release as seen here:
  https://github.com/linuxmint/muffin/releases/tag/master.mint20 (The
  latest is the patch for this bug)

  [Other Info]
   
   * I couldn't pbuilder-dist for some reason. Missing dependencies or stuff didn't exist-in sbuild it did though and my debuild -S did.

   * I will work on patching this in Groovy through debian unstable and
  will  attach the bug report for groovy as part of this
  situation/regression.

  ProblemType: Bug
  DistroRelease: Ubuntu 20.04
  Package: muffin 4.4.3-1
  ProcVersionSignature: Ubuntu 5.4.0-40.44-generic 5.4.44
  Uname: Linux 5.4.0-40-generic x86_64
  ApportVersion: 2.20.11-0ubuntu27.3
  Architecture: amd64
  CasperMD5CheckResult: skip
  CurrentDesktop: ubuntu:GNOME
  Date: Sun Jul 19 21:49:09 2020
  InstallationDate: Installed on 2020-04-23 (87 days ago)
  InstallationMedia: Ubuntu 20.04 LTS "Focal Fossa" - Release amd64 (20200423)
  ProcEnviron:
   TERM=xterm-256color
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  SourcePackage: muffin
  UpgradeStatus: No upgrade log present (probably fresh install)

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