diff --git a/builds/linux/ubuntu/20-04-lts/data/user-data.pkrtpl.hcl b/builds/linux/ubuntu/20-04-lts/data/user-data.pkrtpl.hcl
index 08a56b7ac..348f55428 100644
--- a/builds/linux/ubuntu/20-04-lts/data/user-data.pkrtpl.hcl
+++ b/builds/linux/ubuntu/20-04-lts/data/user-data.pkrtpl.hcl
@@ -43,3 +43,5 @@ ${network}
     - sed -i -e 's/^#\?PasswordAuthentication.*/PasswordAuthentication yes/g' /target/etc/ssh/sshd_config
     - echo '${build_username} ALL=(ALL) NOPASSWD:ALL' > /target/etc/sudoers.d/${build_username}
     - curtin in-target --target=/target -- chmod 440 /etc/sudoers.d/${build_username}
+    - curtin in-target --target=/target -- sed -i 's/^GRUB_CMDLINE_LINUX_DEFAULT=.*$/GRUB_CMDLINE_LINUX_DEFAULT=""/' /etc/default/grub
+    - curtin in-target --target=/target -- update-grub
diff --git a/builds/linux/ubuntu/22-04-lts/data/user-data.pkrtpl.hcl b/builds/linux/ubuntu/22-04-lts/data/user-data.pkrtpl.hcl
index 419cd7315..4d51dee52 100644
--- a/builds/linux/ubuntu/22-04-lts/data/user-data.pkrtpl.hcl
+++ b/builds/linux/ubuntu/22-04-lts/data/user-data.pkrtpl.hcl
@@ -43,3 +43,5 @@ ${network}
     - sed -i -e 's/^#\?PasswordAuthentication.*/PasswordAuthentication yes/g' /target/etc/ssh/sshd_config
     - echo '${build_username} ALL=(ALL) NOPASSWD:ALL' > /target/etc/sudoers.d/${build_username}
     - curtin in-target --target=/target -- chmod 440 /etc/sudoers.d/${build_username}
+    - curtin in-target --target=/target -- sed -i 's/^GRUB_CMDLINE_LINUX_DEFAULT=.*$/GRUB_CMDLINE_LINUX_DEFAULT=""/' /etc/default/grub
+    - curtin in-target --target=/target -- update-grub
diff --git a/builds/linux/ubuntu/24-04-lts/data/user-data.pkrtpl.hcl b/builds/linux/ubuntu/24-04-lts/data/user-data.pkrtpl.hcl
index 2616f7f5e..4ed14c34a 100644
--- a/builds/linux/ubuntu/24-04-lts/data/user-data.pkrtpl.hcl
+++ b/builds/linux/ubuntu/24-04-lts/data/user-data.pkrtpl.hcl
@@ -43,3 +43,5 @@ ${network}
     - sed -i -e 's/^#\?PasswordAuthentication.*/PasswordAuthentication yes/g' /target/etc/ssh/sshd_config
     - echo '${build_username} ALL=(ALL) NOPASSWD:ALL' > /target/etc/sudoers.d/${build_username}
     - curtin in-target --target=/target -- chmod 440 /etc/sudoers.d/${build_username}
+    - curtin in-target --target=/target -- sed -i 's/^GRUB_CMDLINE_LINUX_DEFAULT=.*$/GRUB_CMDLINE_LINUX_DEFAULT=""/' /etc/default/grub
+    - curtin in-target --target=/target -- update-grub