diff -Nru boinc-7.18.1+dfsg/debian/changelog boinc-7.18.1+dfsg/debian/changelog
--- boinc-7.18.1+dfsg/debian/changelog	2022-01-30 08:29:47.000000000 +0000
+++ boinc-7.18.1+dfsg/debian/changelog	2024-03-29 20:13:35.000000000 +0000
@@ -1,3 +1,10 @@
+boinc (7.18.1+dfsg-4ubuntu0.1) jammy; urgency=medium
+
+  * Fix boinc-client crash on old CPUs. (LP: #1970521)
+    - d/rules: Reversing -mavx for compatibility with older servers.
+
+ -- Sudip Mukherjee <sudipm.mukherjee@gmail.com>  Fri, 29 Mar 2024 20:13:35 +0000
+
 boinc (7.18.1+dfsg-4) unstable; urgency=low
 
   * Refresh openssl patch
diff -Nru boinc-7.18.1+dfsg/debian/control boinc-7.18.1+dfsg/debian/control
--- boinc-7.18.1+dfsg/debian/control	2022-01-30 08:29:47.000000000 +0000
+++ boinc-7.18.1+dfsg/debian/control	2024-03-29 20:13:35.000000000 +0000
@@ -1,5 +1,6 @@
 Source: boinc
-Maintainer: Debian BOINC Maintainers <pkg-boinc-devel@lists.alioth.debian.org>
+Maintainer: Ubuntu Developers <ubuntu-devel-discuss@lists.ubuntu.com>
+XSBC-Original-Maintainer: Debian BOINC Maintainers <pkg-boinc-devel@lists.alioth.debian.org>
 Uploaders: Steffen Moeller <moeller@debian.org>,
            Guo Yixuan (郭溢譞) <culu.gyx@gmail.com>,
            Gianfranco Costamagna <locutusofborg@debian.org>
diff -Nru boinc-7.18.1+dfsg/debian/control.in boinc-7.18.1+dfsg/debian/control.in
--- boinc-7.18.1+dfsg/debian/control.in	2022-01-26 22:20:18.000000000 +0000
+++ boinc-7.18.1+dfsg/debian/control.in	2024-03-29 20:13:35.000000000 +0000
@@ -1,5 +1,6 @@
 Source: boinc
-Maintainer: Debian BOINC Maintainers <pkg-boinc-devel@lists.alioth.debian.org>
+Maintainer: Ubuntu Developers <ubuntu-devel-discuss@lists.ubuntu.com>
+XSBC-Original-Maintainer: Debian BOINC Maintainers <pkg-boinc-devel@lists.alioth.debian.org>
 Uploaders: Steffen Moeller <moeller@debian.org>,
            Guo Yixuan (郭溢譞) <culu.gyx@gmail.com>,
            Gianfranco Costamagna <locutusofborg@debian.org>
diff -Nru boinc-7.18.1+dfsg/debian/rules boinc-7.18.1+dfsg/debian/rules
--- boinc-7.18.1+dfsg/debian/rules	2022-01-28 20:02:15.000000000 +0000
+++ boinc-7.18.1+dfsg/debian/rules	2024-03-29 19:57:12.000000000 +0000
@@ -13,11 +13,12 @@
 export CXXFLAGS := $(shell dpkg-buildflags --get CXXFLAGS)
 export LDFLAGS  := $(shell dpkg-buildflags --get LDFLAGS)
 
-ARCH_AVX := i386 amd64 x32 hurd-i386
-ifneq (,$(findstring $(DEB_HOST_ARCH),$(ARCH_AVX)))
-  CPPFLAGS += -mavx
-  CXXFLAGS += -mavx
-endif
+# BOINC client itself is not time-critical and may be an older machine with no AVX yet
+#ARCH_AVX := i386 amd64 x32 hurd-i386
+#ifneq (,$(findstring $(DEB_HOST_ARCH),$(ARCH_AVX)))
+#  CPPFLAGS += -mavx
+#  CXXFLAGS += -mavx
+#endif
 
 #export CXX=clang++
 export AR=ar