diff -Nru makedumpfile-1.6.5/debian/50-kdump-tools.rules makedumpfile-1.6.5/debian/50-kdump-tools.rules
--- makedumpfile-1.6.5/debian/50-kdump-tools.rules	2019-01-05 09:01:02.000000000 -0200
+++ makedumpfile-1.6.5/debian/50-kdump-tools.rules	2019-05-17 12:15:23.000000000 -0300
@@ -2,3 +2,4 @@
 SUBSYSTEM=="memory", ACTION=="offline", PROGRAM="/bin/systemctl try-restart kdump-tools.service"
 SUBSYSTEM=="cpu", ACTION=="add", PROGRAM="/bin/systemctl try-restart kdump-tools.service"
 SUBSYSTEM=="cpu", ACTION=="remove", PROGRAM="/bin/systemctl try-restart kdump-tools.service"
+SUBSYSTEM=="cpu", ACTION=="online", PROGRAM="/bin/systemctl try-restart kdump-tools.service"
diff -Nru makedumpfile-1.6.5/debian/changelog makedumpfile-1.6.5/debian/changelog
--- makedumpfile-1.6.5/debian/changelog	2019-02-07 09:22:23.000000000 -0200
+++ makedumpfile-1.6.5/debian/changelog	2019-06-14 10:58:40.000000000 -0300
@@ -1,8 +1,10 @@
-makedumpfile (1:1.6.5-1ubuntu1~18.04.1) bionic; urgency=low
+makedumpfile (1:1.6.5-1ubuntu2~18.04.1) bionic; urgency=medium
 
-  * Backport back to bionic. (LP: #1655280) (LP: #1790788)
+  [ Thadeu Lima de Souza Cascardo ]
+  * Use maxcpus instead of nr_cpus on ppc64el. (LP: #1828597)
+  * Reload kdump when CPU is brought online. (LP: #1828596)
 
- -- Thadeu Lima de Souza Cascardo <cascardo@canonical.com>  Thu, 07 Feb 2019 09:22:23 -0200
+ -- Thadeu Lima de Souza Cascardo <cascardo@canonical.com>  Fri, 14 Jun 2019 10:58:40 -0300
 
 makedumpfile (1:1.6.5-1ubuntu1) disco; urgency=low
 
diff -Nru makedumpfile-1.6.5/debian/rules makedumpfile-1.6.5/debian/rules
--- makedumpfile-1.6.5/debian/rules	2019-01-14 15:42:44.000000000 -0200
+++ makedumpfile-1.6.5/debian/rules	2019-05-17 12:13:54.000000000 -0300
@@ -7,13 +7,13 @@
 	SUBSTVARS = -Vdist:Depends="kexec-tools"
 endif
 
-KDUMP_CMDLINE_APPEND = nr_cpus=1 systemd.unit=kdump-tools-dump.service
+KDUMP_CMDLINE_APPEND = systemd.unit=kdump-tools-dump.service
 ifeq ($(DEB_HOST_ARCH),arm64)
-	# pass
+	KDUMP_CMDLINE_APPEND += nr_cpus=1
 else ifeq ($(DEB_HOST_ARCH),ppc64el)
-	KDUMP_CMDLINE_APPEND += irqpoll noirqdistrib nousb
+	KDUMP_CMDLINE_APPEND += maxcpus=1 irqpoll noirqdistrib nousb
 else
-	KDUMP_CMDLINE_APPEND += irqpoll nousb ata_piix.prefer_ms_hyperv=0
+	KDUMP_CMDLINE_APPEND += nr_cpus=1 irqpoll nousb ata_piix.prefer_ms_hyperv=0
 endif
 
 %: