I'm afraid this is a tough case to analyse. I'm not sure if there really is an issue or if it just is so complex it just runs into the arbitrary iteration limit of the solver.
It seems opencv stuff is quite complex, I don't know though if you can safely remove all opencv stuff from the system. Temporarily uninstalling krita and darktable might help, as could wine. It stands to reason we could implement the correct mapping in our quirk to directly upgrade those: libopencv-(.*)4.5d => libopencv-\g{1}406t64 But I am not 100% sure, it seems it tries to remove plasma-desktop and ubuntustudio-desktop earlier. Broken plasma-desktop:amd64 Depends on qml-module-org-kde-pipewire:amd64 < none | 5.27.11-0ubuntu2 @un uH > There is another chain of issues there with pulseaudio: Broken pipewire-alsa:amd64 Conflicts on pulseaudio:amd64 < 1:15.99.1+dfsg1-1ubuntu2.2 -> 1:16.1+dfsg1-2ubuntu10 @ii umU > Considering pulseaudio:amd64 11 as a solution to pipewire-alsa:amd64 1 MarkKeep pipewire-alsa:amd64 < none -> 1.0.5-1ubuntu1 @un uN Ib > FU=0 Holding Back pipewire-alsa:amd64 rather than change pulseaudio:amd64 Broken ubuntustudio-pipewire-config:amd64 Breaks on pulseaudio:amd64 < 1:15.99.1+dfsg1-1ubuntu2.2 -> 1:16.1+dfsg1-2ubuntu10 @ii umU > Considering pulseaudio:amd64 11 as a solution to ubuntustudio-pipewire-config:amd64 2 MarkKeep ubuntustudio-pipewire-config:amd64 < none -> 24.04.26 @un uN Ib > FU=0 Holding Back ubuntustudio-pipewire-config:amd64 rather than change pulseaudio:amd64 Installing pulseaudio:amd64 as Recommends of vokoscreen-ng:amd64 Upgrading: pulseaudio-module-jack:amd64 < 1:15.99.1+dfsg1-1ubuntu2.2 | 1:16.1+dfsg1-2ubuntu10 @ii umR > due to pulseaudio-module-jack:amd64 Depends on pulseaudio:amd64 < 1:15.99.1+dfsg1-1ubuntu2.2 | 1:16.1+dfsg1-2ubuntu10 @ii umR > (= 1:15.99.1+dfsg1-1ubuntu2.2) MarkInstall pulseaudio:amd64 < 1:15.99.1+dfsg1-1ubuntu2.2 -> 1:16.1+dfsg1-2ubuntu10 @ii umU > FU=0 MarkInstall pulseaudio-module-jack:amd64 < 1:15.99.1+dfsg1-1ubuntu2.2 -> 1:16.1+dfsg1-2ubuntu10 @ii umU > FU=0 I believe there is something wrong somewhere with those pulseaudio dependencies and either way you'd end up failing even if we fix opencv. It seems ubuntustudio-desktop is missing some pipewire depends to force it being installed or something. ** Also affects: ubuntustudio-meta (Ubuntu) Importance: Undecided Status: New -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2078639 Title: The update crashes at the same place. I have looked but cannot find any non-Ubuntu apps that may cause a problem To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ubuntu-release-upgrader/+bug/2078639/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs