LILO and nvme

I recently upgraded to a 1 TB NVME drive and I have Windows 10 on it. The computer boots by default from another disk, a standard SSD, where Slackware -current is installed with LILO. The problem is that selecting Windows from LILO does not boot it. The screen just stays blank. If I specify in the BIOS that the NVME has boot priority, it boots fine.

So, Slackware is on /dev/sda, while Windows on /dev/nvme0n1. I searched quite a bit and finally found this blog post with some very useful comments. Apparently all I needed to do is add the following line in the beginning of /etc/lilo.conf:

# LILO configuration file
# generated by 'liloconfig'
#
# Start LILO global section
boot = /dev/sda
disk=/dev/nvme0n1 bios=0x80 max-partitions=7

# This option loads the kernel and initrd much faster:
compact

My Linux (I have /boot on sda1, while / is on sda2) and Windows (only one partition nvme0n1p1) entries are as follows:

# Linux bootable partition config begins
image = /boot/vmlinuz-generic-5.7.6
  initrd = /boot/initrd-5.7.6.gz
  root = /dev/sda2
  label = generic-5.7.6
  read-only

and

# Windows bootable partition config begins
  other = /dev/nvme0n1p1
  label = Win10
  table = /dev/nvme0n1

After running lilo -v, LILO boots Windows just fine from the NVME.