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[Bug 1140464] New: grub: error message "error: serial port `com0' isn't found. error: terminal `serial' isn't found."
  • From: bugzilla_noreply@xxxxxxxxxx
  • Date: Fri, 05 Jul 2019 07:55:28 +0000
  • Message-id: <bug-1140464-21960@http.bugzilla.opensuse.org/>
http://bugzilla.opensuse.org/show_bug.cgi?id=1140464


Bug ID: 1140464
Summary: grub: error message "error: serial port `com0' isn't
found. error: terminal `serial' isn't found."
Classification: openSUSE
Product: openSUSE Distribution
Version: Leap 15.1
Hardware: aarch64
OS: Other
Status: NEW
Severity: Normal
Priority: P5 - None
Component: Bootloader
Assignee: jsrain@xxxxxxxx
Reporter: okurz@xxxxxxxx
QA Contact: jsrain@xxxxxxxx
Found By: ---
Blocker: ---

## Observation

On the serial terminal (SOL from IPMI) of an aarch64 machine I can see the
following error messages immediately after the message `Welcome to GRUB!`:

```
error: serial port `com0' isn't found.
error: terminal `serial' isn't found.
error: terminal `serial' isn't found.
```

but the grub menu appears correctly though in the SOL session.

/etc/default/grub contains:

```
GRUB_SERIAL_COMMAND="serial --unit=0 --speed=115200 --parity=no"
```

output on dmesg regarding any serial port:

```
[ 0.278976] Serial: AMBA PL011 UART driver
[ 2.621554] Serial: 8250/16550 driver, 4 ports, IRQ sharing enabled
[ 2.827127] Serial: AMBA driver
[ 2.827201] msm_serial: driver initialized
[ 2.869881] ARMH0011:00: ttyAMA0 at MMIO 0x602b0000 (irq = 8, base_baud = 0)
is a SBSA
[ 2.869917] console [ttyAMA0] enabled
```

I assume the configuration comes from the YaST installer?


## Further details

External references I have found:

*
https://forum.up-community.org/discussion/1883/i-installed-ubuntu-16-04-2-desktop-amd64-iso-still-no-serial-port-working
* https://lists.gnu.org/archive/html/help-grub/2017-01/msg00018.html

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