I'm switching a server to UEFI boot -- and bumping into issues with serial console config running on uname -rm 5.5.6-24.g4a830b1-default x86_64 with grub2-install --version grub2-install (GRUB2) 2.04 my grub config currently includes, GRUB_TERMINAL_OUTPUT="gfxterm serial" GRUB_SERIAL_COMMAND="serial --unit=0 --speed=115200 --parity=n --word=8 --stop=1" GRUB_CMDLINE_LINUX=" ... \ console=tty0 console=ttyS0,115200n81 \ earlyprintk=serial,ttyS0,115200,keep" i.e., cat /proc/cmdline BOOT_IMAGE=/vmlinuz-5.5.6-24.g4a830b1-default i915.modeset=1 acpi_osi=Linux systemd.log_level=info systemd.log_target=kmsg log_buf_len=1M printk.devkmsg=on console=tty0 console=ttyS0,115200n81 earlyprintk=serial,ttyS0,115200,keep ... Connected to the serial console from a local desktop running 'minicom', output _does_ appear as expected. However, formatting -- specifically carriage returns / line feeds -- _starts_ out OK, and _finishes_ OK once reaching the login prompt, and after. But, in the 'middle', CRs/LFs go cause loss of display on serial console. Here's what I see in desktop's 'minicom' connected to server's serial port: https://pastebin.com/raw/KNB2JDHM What needs to be configured to get the serial console to output consistently 'well behaved' formatting from start of output to login prompt, and onward?
