From mboxrd@z Thu Jan 1 00:00:00 1970 From: David Mosberger Date: Mon, 08 Mar 2004 21:28:02 +0000 Subject: Re: Help in setting up serial console on 64 bit machine Message-Id: <16460.58722.881615.608507@napali.hpl.hp.com> List-Id: References: <53CF1076699CD711B7DD0002A51363F102C36031@exw-ks.ks.lsil.com> In-Reply-To: <53CF1076699CD711B7DD0002A51363F102C36031@exw-ks.ks.lsil.com> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: "Dachepalli, Sudhir" Cc: "'Linux-Kernel (E-mail)'" , linux-ia64@vger.kernel.org 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" 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 timeoutP 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 Sudhir> - To unsubscribe from this list: send the line "unsubscribe Sudhir> linux-serial" in the body of a message to Sudhir> majordomo@vger.kernel.org More majordomo info at Sudhir> http://vger.kernel.org/majordomo-info.html - To unsubscribe Sudhir> from this list: send the line "unsubscribe linux-kernel" in Sudhir> the body of a message to majordomo@vger.kernel.org More Sudhir> majordomo info at http://vger.kernel.org/majordomo-info.html Sudhir> Please read the FAQ at http://www.tux.org/lkml/