# make sure to use /dev/mapper/dmroot, not /dev/xvda directly - both have the # same fs, including UUID GRUB_DEVICE=/dev/mapper/dmroot GRUB_DISABLE_LINUX_UUID=true GRUB_DISABLE_OS_PROBER=true GRUB_CMDLINE_LINUX="$GRUB_CMDLINE_LINUX root=/dev/mapper/dmroot console=tty0 console=hvc0" # make SWIOTLB smaller - it isn't really needed unless PCI passthrough is used, # and even then, 16MB is enough GRUB_CMDLINE_LINUX="$GRUB_CMDLINE_LINUX swiotlb=8192" # add noresume - to avoid a 30 second hang on Debian HVM boot as it tries to # locate swap space for hibernation GRUB_CMDLINE_LINUX="$GRUB_CMDLINE_LINUX noresume" GRUB_TIMEOUT=0