Re: Can't enable uart for Ubuntu SOS
Geoffroy Van Cutsem
Hi Zhangshuai,toggle quoted messageShow quoted text
What is your version of Ubuntu? I'm running Ubuntu 20.04 on a machine and did not have to update Grub to install ACRN.
This is the right location, do you see the Grub menu at all after updating the Grub binary? If not, can you get to the EFI shell and manually start it from there? Make sure you have secure boot turned off in your bios as well.
Back to your question about the UART, can you also try to use the bdf info instead, i.e.:
# lspci | grep UART
00:18.0 . Series HSUART Controller #1 (rev 0b)
00:18.1 . Series HSUART Controller #2 (rev 0b)
Which translates into uart=bdf@00:18.1 (if you want to use the second one for example).
One last thing, make sure you have flow control (HW and SW) turned off in your serial port program (e.g. minicom).