diff --git a/live-build/ubuntu-cpc/hooks.d/base/riscv64/grub/10_cmdline.cfg b/live-build/ubuntu-cpc/hooks.d/base/riscv64/grub/10_cmdline.cfg
index c8cf57d0..39cd1e13 100644
--- a/live-build/ubuntu-cpc/hooks.d/base/riscv64/grub/10_cmdline.cfg
+++ b/live-build/ubuntu-cpc/hooks.d/base/riscv64/grub/10_cmdline.cfg
@@ -1,4 +1,4 @@
 # Booting on many riscv64 systems is slow. Let the user view progress.
 # For minimum output use
 # GRUB_CMDLINE_LINUX_DEFAULT="quiet"
-GRUB_CMDLINE_LINUX_DEFAULT="efi=debug earlycon"
+GRUB_CMDLINE_LINUX_DEFAULT="efi=debug earlycon=sbi"
diff --git a/live-build/ubuntu-cpc/hooks.d/base/riscv64/u-boot-menu/10_cmdline.conf b/live-build/ubuntu-cpc/hooks.d/base/riscv64/u-boot-menu/10_cmdline.conf
index 380be66e..231c2c23 100644
--- a/live-build/ubuntu-cpc/hooks.d/base/riscv64/u-boot-menu/10_cmdline.conf
+++ b/live-build/ubuntu-cpc/hooks.d/base/riscv64/u-boot-menu/10_cmdline.conf
@@ -1 +1 @@
-U_BOOT_PARAMETERS="ro efi=debug earlycon"
+U_BOOT_PARAMETERS="ro efi=debug earlycon=sbi"