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SubjectRe: Help in setting up serial console on 64 bit machine
Sudhir,

First a general comment: for ia64-specific questions, it's generally
better to ask on linux-ia64@vger.kernel.org.

As for your particular issue: the serial console normally is ttyS0,
not ttyS1, so that might be the reason you're not seeing any output.

Also, 9600 baud is rather slow. If the client-side can handle it,
115200 baud will be much nicer.

--david

>>>>> On Mon, 8 Mar 2004 15:04:04 -0600 , "Dachepalli, Sudhir" <sudhir.dachepalli@lsil.com> said:

Sudhir> Hello SerialConsole user,

Sudhir> I have a problem while setting up serial console to
Sudhir> direct kernel printk messages to serial console. I dont see
Sudhir> messages getting displayed.

Sudhir> My setup --------- 1. IA 64 machine. 2. Redhat AS 3.0
Sudhir> 3. Kernel 2.4.18-e.37smp 4. Server Hardware : HP rx5670

Sudhir> Serial Console setup -------------------- 1. I have
Sudhir> connected serial cable between two linux terminals. 2. open
Sudhir> minicom on both servers. 3. changed the settings to
Sudhir> 9600-8-n-1, no h/w flow control, no s/w flow control, stop
Sudhir> bits =1. 4. I typed some charecters on server 1 and saw the
Sudhir> charecters appear in server 2's minicom. 5. I typed some
Sudhir> charecters on server 2 and saw the charecters appear in
Sudhir> server 1's minicom. 6. I have changed the kernel command
Sudhir> line for booting the kernel . PLEASE SEE BELOW FOR
Sudhir> "elilo.conf". 7. label=serial ( elilo entry to boot the
Sudhir> serial console setup. ) 8. I have also checked the options
Sudhir> in "make menuconfig" and found everything correct for serial
Sudhir> console setup.

Sudhir> After selecting "label=serial" and botting the OS the
Sudhir> following is the command line from proc. [root@beast root]#
Sudhir> cat /proc/cmdline
Sudhir> BOOT_IMAGE=scsi0:EFI\redhat\vmlinuz-2.4.18-e.37smp
Sudhir> root=LABEL=/ console=ttyS1,9600n8 console=tty0 ro

Sudhir> The kernel cmdline seems to be correct but the messages are
Sudhir> not directed on console. I have setup serial consoles on 32
Sudhir> bit machines earlier, but not on 64 bit.

Sudhir> Please throw me some pointers to make it work.


Sudhir> regards, sudhir dachepalli



Sudhir> [root@beast root]# uname -a Linux beast 2.4.18-e.37smp #1
Sudhir> SMP Tue Aug 5 16:07:26 EDT 2003 ia64 unknown

Sudhir> [root@beast root]# cat /etc/*release* Red Hat Linux Advanced
Sudhir> Server release 2.1AS (Derry) prompt timeout=50
Sudhir> default=2.4.18-e.37smp

Sudhir> image=vmlinuz-2.4.18-e.37 label=2.4.18-e.37
Sudhir> initrd=initrd-2.4.18-e.37.img read-only
Sudhir> append="root=LABEL=/"

Sudhir> image=vmlinuz-2.4.18-e.37 label=scsi-128 initrd=scsi-128.img
Sudhir> read-only root=/dev/sda4

Sudhir> image=vmlinuz-2.4.18-e.37smp label=2.4.18-e.37smp
Sudhir> initrd=initrd-2.4.18-e.37smp.img read-only
Sudhir> append="root=LABEL=/"

Sudhir> image=vmlinuz-2.4.18-e.37smp label=serial
Sudhir> initrd=initrd-2.4.18-e.37smp.img read-only
Sudhir> append="root=LABEL=/ console=ttyS1,9600n8 console=tty0"

Sudhir> image=vmlinuz-2.4.18-e.37smp label=lyq initrd=lyq.img
Sudhir> read-only append="root=LABEL=/"

Sudhir> image=vmlinuz-2.4.18-e.37smp label=mpp initrd=mpp.img
Sudhir> read-only root=/dev/sda4

Sudhir> image=vmlinuz-2.4.18-e.12smp label=linux
Sudhir> initrd=initrd-2.4.18-e.12smp.img read-only root=/dev/sda4

Sudhir> image=vmlinuz-2.4.18-e.12 label=linux-up
Sudhir> initrd=initrd-2.4.18-e.12.img read-only root=/dev/sda4


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