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Old 11-20-2011, 10:20 PM
Tru Huynh
 
Default serial console oddities with CentOS Linux release 6.0 (Final)

On Sun, Nov 20, 2011 at 02:13:13PM -0500, Dennis Clarke wrote:
>
....
> However I can not actually see the GRUB menu at boot time. I see nothing
> until the server begins to boot and then I can see everything. However the
> grub menu is absent entirely.
>
> My config looks like so :
>
..
> serial --unit=0 --speed=9600 --word=8 --parity=no --stop=1
> terminal -timeout=30 serial console
put these two lines at the beginning and fix the --timeout typo

This config works for me:
<cut>
serial --unit=0 --speed=38400
terminal --timeout=10 serial console
default=0
timeout=5

title CentOS Linux (2.6.32-71.29.1.el6.x86_64)
root (hd0,0)
kernel /vmlinuz-2.6.32-71.29.1.el6.x86_64 ro root=/dev/mapper/vg_c6-lv_root rd_LVM_LV=vg_c6/lv_root rd_LVM_LV=vg_c6/lv_swap rd_NO_LUKS rd_NO_MD rd_NO_DM LANG=en_US.UTF-8 SYSFONT=latarcyrheb-sun16 KEYBOARDTYPE=pc KEYTABLE=us nomodeset crashkernel=auto rhgb quiet console=tty0 console=ttyS0,38400n
initrd /initramfs-2.6.32-71.29.1.el6.x86_64.img
</cut>

Cheers,

Tru

--
Tru Huynh (mirrors, CentOS i386/x86_64 Package Maintenance)
http://pgp.mit.edu:11371/pks/lookup?op=get&search=0xBEFA581B
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Old 11-21-2011, 04:34 PM
Paul Heinlein
 
Default serial console oddities with CentOS Linux release 6.0 (Final)

On Sun, 20 Nov 2011, Dennis Clarke wrote:

> My config looks like so :
>
> # grep -v "^#" /boot/grub/grub.conf
> default=0
> timeout=30
> serial --unit=0 --speed=9600 --word=8 --parity=no --stop=1
> terminal -timeout=30 serial console

The "timeout" option needs a double-dash: "--timeout".

> title CentOS (2.6.32-71.el6.x86_64)
> root (hd0,0)
> kernel /vmlinuz-2.6.32-71.el6.x86_64 ro
> root=UUID=2396ae8a-7eaa-4690-8701-10fb1b604e21 rd_NO_LUKS
> rd_NO_LVM rd_NO_MD rd_NO_DM LANG=en_US.UTF-8
> SYSFONT=latarcyrheb-sun16 KEYBOARDTYPE=pc KEYTABLE=us
> crashkernel=auto rhgb console=tty0 console=ttyS0,9600n8

I've always edited out the "rhgb" option when I depend on a serial
console, but I honestly haven't checked whether it makes any
difference in CentOS 6.0.

--
Paul Heinlein <> heinlein@madboa.com <> http://www.madboa.com/
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