3 files changed, 12 insertions, 2 deletions
diff --git a/apt-pkg/depcache.cc b/apt-pkg/depcache.cc
index f7f508f85..09d7a93bc 100644
--- a/apt-pkg/depcache.cc
+++ b/apt-pkg/depcache.cc
@@ -1853,6 +1853,10 @@ bool pkgDepCache::IsInstallOkMultiArchSameVersionSynced(PkgIterator const &Pkg,
       if (CV.Downloadable() == false)
 	 continue;
 
+      // Ignore siblings marked for deletion
+      if (PkgState[P->ID].Delete())
+	 continue;
+
       PkgState[Pkg->ID].iFlags |= AutoKept;
       if (unlikely(DebugMarker == true))
 	 std::clog << OutputInDepth(Depth) << "Ignore MarkInstall of " << APT::PrettyPkg(this, Pkg)
diff --git a/apt-pkg/solver3.cc b/apt-pkg/solver3.cc
index 65e3940b4..4d7e0ff0b 100644
--- a/apt-pkg/solver3.cc
+++ b/apt-pkg/solver3.cc
@@ -1007,6 +1007,7 @@ void APT::Solver::UndoOne()
       auto &state = (*this)[solvedItem.assigned];
       state.decision = Decision::NONE;
       state.reason = nullptr;
+      state.reasonStr = nullptr;
       state.depth = 0;
    }
 
@@ -1071,6 +1072,8 @@ bool APT::Solver::Pop()
    if (not choice.empty() && not Enqueue(choice, false, {}))
       return false;
 
+   (*this)[choice].reasonStr = "backtracked";
+
    if (unlikely(debug >= 2))
       std::cerr << "Backtracked to choice " << choice.toString(cache) << "\n";
 
@@ -1366,7 +1369,8 @@ bool APT::Solver::ToDepCache(pkgDepCache &depcache) const
       }
       else if (P->CurrentVer || depcache[P].Install())
       {
-	 depcache.MarkDelete(P, false, 0, not(*this)[P].reason);
+	 bool automatic = (not (*this)[P].reason) && (not (*this)[P].reasonStr);
+	 depcache.MarkDelete(P, false, 0, automatic);
 	 depcache[P].Marked = 0;
 	 depcache[P].Garbage = 1;
       }
diff --git a/apt-pkg/solver3.h b/apt-pkg/solver3.h
index 8d834b313..45b55d962 100644
--- a/apt-pkg/solver3.h
+++ b/apt-pkg/solver3.h
@@ -237,7 +237,7 @@ class Solver
    // \brief If set, removals are allowed.
    bool AllowRemove{_config->FindB("APT::Solver::Remove", not(requestFlags & EDSP::Request::FORBID_REMOVE))};
    // \brief If set, removal of manual packages is allowed.
-   bool AllowRemoveManual{AllowRemove && _config->FindB("APT::Solver::RemoveManual", false)};
+   bool AllowRemoveManual{AllowRemove && _config->FindB("APT::Solver::RemoveManual", true)};
    // \brief If set, installs are allowed.
    bool AllowInstall{_config->FindB("APT::Solver::Install", not(requestFlags & EDSP::Request::FORBID_NEW_INSTALL))};
    // \brief If set, we use strict pinning.
@@ -477,6 +477,8 @@ struct APT::Solver::State
    // Vars < 0 are package ID, reasons > 0 are version IDs.
    const Clause *reason{};
 
+   const char *reasonStr{};
+
    // \brief The depth at which the decision has been taken
    depth_type depth{0};