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[Bug 2111450] Re: [SRU] ppm and vu meter backgrounds not redrawn properly

 

** Attachment added: "Patchance example for test case"
   https://bugs.launchpad.net/ubuntu/+source/meterbridge/+bug/2111450/+attachment/5879574/+files/Screenshot_20250521_103900.png

** Also affects: meterbridge (Ubuntu Oracular)
   Importance: Undecided
       Status: New

** Also affects: meterbridge (Ubuntu Plucky)
   Importance: Undecided
       Status: New

** Also affects: meterbridge (Ubuntu Questing)
   Importance: High
     Assignee: Erich Eickmeyer (eeickmeyer)
       Status: In Progress

** Also affects: meterbridge (Ubuntu Noble)
   Importance: Undecided
       Status: New

** Changed in: meterbridge (Ubuntu Noble)
     Assignee: (unassigned) => Erich Eickmeyer (eeickmeyer)

** Changed in: meterbridge (Ubuntu Oracular)
     Assignee: (unassigned) => Erich Eickmeyer (eeickmeyer)

** Changed in: meterbridge (Ubuntu Plucky)
     Assignee: (unassigned) => Erich Eickmeyer (eeickmeyer)

** Changed in: meterbridge (Ubuntu Plucky)
   Importance: Undecided => High

** Changed in: meterbridge (Ubuntu Oracular)
   Importance: Undecided => High

** Changed in: meterbridge (Ubuntu Noble)
   Importance: Undecided => High

** Bug watch added: Debian Bug tracker #1050548
   https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1050548

** Also affects: meterbridge (Debian) via
   https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1050548
   Importance: Unknown
       Status: Unknown

** Changed in: meterbridge (Ubuntu Questing)
       Status: In Progress => Fix Committed

** Changed in: meterbridge (Ubuntu Noble)
       Status: New => In Progress

** Changed in: meterbridge (Ubuntu Oracular)
       Status: New => In Progress

** Changed in: meterbridge (Ubuntu Plucky)
       Status: New => In Progress

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https://bugs.launchpad.net/bugs/2111450

Title:
  [SRU] ppm and vu meter backgrounds not redrawn properly

Status in meterbridge package in Ubuntu:
  Fix Committed
Status in meterbridge source package in Noble:
  In Progress
Status in meterbridge source package in Oracular:
  In Progress
Status in meterbridge source package in Plucky:
  In Progress
Status in meterbridge source package in Questing:
  Fix Committed
Status in meterbridge package in Debian:
  Unknown

Bug description:
  [Impact]

  The meters in Meterbridge are not redrawn correctly. This is due to a
  change in libsdl. As such, users are seeing lines after the meter
  shows any activity which can, over time, appear illegible, affecting
  usability. See attached screenshot.

  [Test Case]

  As this is a JACK application, either:

  * Run Ubuntu Studio 25.04's live iso or any Ubuntu Studio 25.04
  installation

  -or-

  * Install ubuntustudio-pipewire-config to install required JACK
  configurations for pipewire to get it to properly use the pipewire-
  jack interface.

  * Install meterbridge and patchance

  * Run meterbridge

  * Run patchance

    * Attach a wire via dragging from the monitor of your default audio
  device to the input on meterbridge.

  * Have your system make a sound (volume control or youtube video) and
  watch the needle on the meterbridge window.

  EXPECTED: No ghost lines

  ACTUAL: Ghost lines appear where needle once was.

  [What could go wrong]

  It's possible this patch just plain doesn't work or further refinement
  is needed, and this patch might just cause meterbridge to not run.
  This has, however, been tested to work on Ubuntu Studio 25.04.

  [Other Information]

  Debian Bug: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1050548

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References