Fix Lubuntu installation issues stemming from pkgselect problems

common/modules/pkgselect/PackageSelectViewStep.cpp

@@ -5,6 +5,7 @@
 #include "network/Manager.h"
 
 #include <QVariantMap>
+#include <QFile>
 
 PackageSelectViewStep::PackageSelectViewStep( QObject* parent )
     : Calamares::ViewStep( parent ),
@@ -33,7 +34,7 @@ bool PackageSelectViewStep::exists_and_true(const QString& key) const
 }
 
 QWidget* PackageSelectViewStep::widget()
-{   
+{
     return m_widget;
 }
 
@@ -187,6 +188,22 @@ PackageSelectViewStep::onLeave()
 	    }
     }
     gs->insert("packages", config);
+
+    /*
+     * This is a hack; a config file would be the right way to specify whether
+     * the distribution we're running on uses stacked squashfses or not. That
+     * being said, pulling in the full config framework for this would be
+     * overkill at the moment, so we're just using a flag file for this. If we
+     * ever need more than this, we should use Calamares' configuration
+     * framework instead.
+     */
+    if (QFile::exists("/etc/calamares/modules/stacked_squashfs.flag")) {
+        if (!ui->minimal_button->isChecked()) {
+            QVariantMap enableAllUnpack;
+            enableAllUnpack.insert("unpack_regular", true);
+            gs->insert("installation_data", enableAllUnpack);
+        }
+    }
 }
 
 void PackageSelectViewStep::updatePackageSelections(bool checked) {

debian/changelog

@@ -1,3 +1,12 @@
+calamares-settings-ubuntu (1:25.10.4) questing; urgency=medium
+
+  * Don't try to uninstall packages to make a minimal system when stacked
+    squashfses are in use. (LP: #2121435)
+  * Unpack the second squashfs when doing non-minimal installs when stacked
+    squashfses are in use. (LP: #2121155)
+
+ -- Aaron Rainbolt <arraybolt3@ubuntu.com>  Tue, 26 Aug 2025 17:21:35 -0500
+
 calamares-settings-ubuntu (1:25.10.3) questing; urgency=medium
 
   * Fix an FTBFS on riscv64 by disabling CGO on that platform.

lubuntu/modules/pkgselect_context.conf

@@ -1,19 +1,15 @@
 ---
 dontChroot: false
 timeout: 10800
-"packages.minimalButton":
-    true:
-        - "DEBIAN_FRONTEND=noninteractive apt-get -y --purge remove snapd lubuntu-snap-installation-monitor vlc plasma-discover transmission-qt quassel 2048-qt featherpad noblenote kcalc qps zsync partitionmanager qapt-deb-installer picom qlipper qtpass libreoffice*"
-        - "apt-get -y autoremove"
 "packages.partyButton":
     true:
         - "DEBIAN_FRONTEND=noninteractive apt-get update"
         - "DEBIAN_FRONTEND=noninteractive apt-get -y install ubuntu-restricted-addons unrar"
 "packages.updatesButton":
-    true: 
+    true:
         - "DEBIAN_FRONTEND=noninteractive apt-get update"
         - "DEBIAN_FRONTEND=noninteractive apt-get -y -o Dpkg::Options::='--force-confnew' full-upgrade"
 "packages.virtmanagerButton":
-    true: 
+    true:
         - "DEBIAN_FRONTEND=noninteractive apt-get update"
         - "DEBIAN_FRONTEND=noninteractive apt-get -y install virt-manager"

lubuntu/modules/stacked_squashfs.flag

@@ -0,0 +1,3 @@
+This file exists to indicate to Calamares that the OS image it is running on
+uses stacked squashfses. It is necessary for Calamares to unpack all
+applicable squashfses when doing a non-minimal install.