diff --git a/rootfs.py b/rootfs.py
index 143eafc7..fac39c2d 100755
--- a/rootfs.py
+++ b/rootfs.py
@@ -830,9 +830,9 @@ def _qemu_arg_list_for_kernel(args, generator, target, size):
         '-append',
     ]
     if args.interactive:
-        arg_list += ['consoleblank=0 earlyprintk=vga root=/dev/sda1 rootfstype=ext3 init=/init rw']
+        arg_list += ['consoleblank=0 earlyprintk=vga root=/dev/sda1 init=/init rw']
     else:
-        arg_list += ['console=ttyS0 earlycon=uart8250,io,0x3f8,115200n8 root=/dev/sda1 rootfstype=ext3 init=/init rw']
+        arg_list += ['console=ttyS0 earlycon=uart8250,io,0x3f8,115200n8 root=/dev/sda1 init=/init rw']
     return arg_list
 
 
diff --git a/steps-guix/jump/linux64.sh b/steps-guix/jump/linux64.sh
index 9dc79984..6807a849 100644
--- a/steps-guix/jump/linux64.sh
+++ b/steps-guix/jump/linux64.sh
@@ -26,4 +26,7 @@ else
     kexec -l "${current_kernel}" --console-serial \
         --append="console=ttyS0 root=/dev/sda1 init=/init rw rootwait"
 fi
+sync
+echo u > /proc/sysrq-trigger || true
+mount -o remount,ro / || true
 kexec -e
diff --git a/steps/jump/linux.sh b/steps/jump/linux.sh
index 3496d58d..79ea533f 100755
--- a/steps/jump/linux.sh
+++ b/steps/jump/linux.sh
@@ -23,10 +23,13 @@ else
     # kexec time
     if [ "${BARE_METAL}" = True ]; then
         kexec -l "/boot/vmlinuz" \
-            --append="root=/dev/sda1 rootfstype=ext3 init=/init rw rootwait"
+            --append="root=/dev/sda1 init=/init rw rootwait"
     else
         kexec -l "/boot/vmlinuz" --console-serial \
-            --append="console=ttyS0 root=/dev/sda1 rootfstype=ext3 init=/init rw rootwait"
+            --append="console=ttyS0 root=/dev/sda1 init=/init rw rootwait"
     fi
+    sync
+    echo u > /proc/sysrq-trigger || true
+    mount -o remount,ro / || true
     kexec -e
 fi