How can I fix this Serial Console Problem?

Question

For more information on the Azure Serial Console, see <https://aka.ms/serialconsolelinux>.
Connecting to console of TelesupplyDemo □ ■ □
+-----------------------------------------------+
Connected to the serial port of the VM.
If no login prompt is displayed, press ENTER.
+-----------------------------------------------+

Initializing cgroup subsys cpuset
Initializing cgroup subsys cpu
Linux version 2.6.32-754.27.1.mxel6.1.zultys.1.i686 (mockbuild@centos7-node02) (gcc version 4.4.7 20120313 (Red Hat 4.4.7-23) (GCC) ) #1 SMP Wed Feb 26 05:54:54 PST 2020
KERNEL supported cpus:
Intel GenuineIntel
AMD AuthenticAMD
NSC Geode by NSC
Cyrix CyrixInstead
Centaur CentaurHauls
Transmeta GenuineTMx86
Transmeta TransmetaCPU
UMC UMC UMC UMC
BIOS-provided physical RAM map:
BIOS-e820: 0000000000000000 - 000000000009fc00 (usable)
BIOS-e820: 000000000009fc00 - 00000000000a0000 (reserved)
BIOS-e820: 00000000000e0000 - 0000000000100000 (reserved)
BIOS-e820: 0000000000100000 - 000000003fff0000 (usable)
BIOS-e820: 000000003fff0000 - 000000003ffff000 (ACPI data)
BIOS-e820: 000000003ffff000 - 0000000040000000 (ACPI NVS)
BIOS-e820: 0000000100000000 - 00000001c0000000 (usable)
bootconsole [earlyser0] enabled
?

Answer 1

@Richard Valle Did you resize your VM? From when exactly are you facing this issue?What was your last attempted time to access the serial console? Can you share the screenshot of the error?
What is the status of the Virtual Machine in the portal? For example, Running, Stopped, Failed, etc

As I understand when you to use SAC, the screen will show
+-----------------------------------------------+
Connected to the serial port of the VM.
If no login prompt is displayed, press ENTER.
+-----------------------------------------------+
If you press ENTER nothing happens

Based on this we can assume issue may be related: - Serial Console is not enabled on the Guest or The OS is not on a healthy state and/or the Kernel didn't started.
On Linux VMs:

• Check the Guest OS is any of the Endorse Linux distros
• Then depending on the distro:

Access for RedHat

• Log in to the Red Hat system via SSH
• Enable password for root user
• passwd root (set a strong root password)
• Ensure root user can only log in via ttyS0
• edit /etc/ssh/sshd_config and ensure PermitRootLog in is set to no
• edit /etc/securetty file to only allow log in via ttyS0 Now if the system boots into single user mode you can log in via root password.

Ensure the feature is enabled in the GuestOS: Azure Serial Console

Hope this helps! Kindly let us know if the above helps or you need further assistance on this issue.

Looking forward for your reply!

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