Re: Can't enable uart for Ubuntu SOS


Victor Sun
 

Hi Shuai,

First of all, make sure your grub has below commit:

http://git.savannah.gnu.org/cgit/grub.git/commit/?id=0f3f5b7c13fa9b677a64cf11f20eca0f850a2b20 multiboot2: Set min address for mbi allocation to 0x1000

 

If the issue still occurs, please post your board file and scenario file.

 

BR,

Victor

 

From: acrn-users@... <acrn-users@...> On Behalf Of "西安研发中心-数控研发部-张帅
Sent: Thursday, February 4, 2021 10:26 AM
To: acrn-users@...
Subject: [acrn-users] Can't enable uart for Ubuntu SOS

 

Hello,
        We have a development board with i5-7300U and tried to install acrn sos. We generated the board and scenario xmls using ACRN Configuration Tool, builded the acrn Hypervisor with RELEASE=0. When boot into ubuntu-service-vm, the system got stuck with HDMI show "loading ACRN..."
        There is a serial port on the board, so we want to output the boot log. The setting of the uart is as fellows. The serial works ok when boot into the Ubuntu without acrn kernel(native boot?) ; but there is nothing output when boot into  ubuntu-service-vm.  Is this configuration correct? or should I do something else?

$ dmesg | grep tty
[   13.399735] dw-apb-uart.2: ttyS4 at MMIO 0xb151b000 (irq = 20, base_baud = 115200) is a 16550A
[   13.399769] printk: console [ttyS4] enabled

$ vi /etc/grub.d/40_custom
#!/bin/sh
exec tail -n +3 $0
# This file provides an easy way to add custom menu entries.  Simply type the
# menu entries you want to add after this comment.  Be careful not to change
# the 'exec tail' line above.
menuentry "ACRN Multiboot Ubuntu Service VM" --id ubuntu-service-vm {
  load_video
  insmod gzio
  insmod part_gpt
  insmod ext2

  search --no-floppy --fs-uuid --set 9efd748b-88fc-4082-b2f9-2e91b6e3dc07
  echo 'loading ACRN...'
  multiboot2 /boot/acrn/acrn.bin  root=PARTUUID="41d2eeec-fd7b-4479-9ae0-3a41845d25ff" uart=mmio@0xb151b000
  module2 /boot/bzImage Linux_bzImage
}


Best Regards
zhangshuai

 

------------------------- 
Xi'an R&D Center Computerized Numerical Control R&D Dept.  Shuai Zhang 
Tel : 029-84503040-8360 
E-mail :  zhangshuai@...     Web :  www.jingdiao.com

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