modify
vim /etc/default/grub
Inside the modification
GRUB_CMDLINE_LINUX="8250.nr_uarts=16"
then
update-grub
reboot
Premise: serial port driver is 8250
View
cat /boot/config-`uname -r` | grep 8250
modify
vim /etc/default/grub
Inside the modification
GRUB_CMDLINE_LINUX="8250.nr_uarts=16"
then
update-grub
reboot
Premise: serial port driver is 8250
View
cat /boot/config-`uname -r` | grep 8250