What if you append "init=" e.g., something like "init=/bin/ash" as part of bootargs?
You may need to have a look at /etc/inittab in your filesystem. Regards - Hemant ________________________________ From: [email protected] [mailto:[email protected]] On Behalf Of kunal singh Sent: Thursday, September 30, 2010 6:05 PM To: Raffaele Recalcati Cc: [email protected] Subject: Re: problem with serial console Hi Raffaele, Thanks for the suggestion. (1) Console is fine. I am able to communicate with the u-boot (115200,n8). Also if I use printascii (a kernel function) I am able to output on console. (2) There is no message, after the kernel decompression (because console is not up). Here is what I see. Load address: 0x82000000 Loading: ####T ###################T ########################################## ################################################################## ######################T ############################################ ################################################################# ###################T ##############################################T ## ######T ######################################## done Bytes transferred = 1898828 (1cf94c hex) ## Booting image at 82000000 ... Image Name: Linux-2.6.32-rc2-davinci1 Image Type: ARM Linux Kernel Image (uncompressed) Data Size: 1898764 Bytes = 1.8 MB Load Address: 80008000 Entry Point: 80008000 Verifying Checksum ... OK OK Starting kernel ... Uncompressing Linux........................................................................................................................... done, booting the kernel. /* AND THEN NOTHING BECAUSE CONSOLE IS NOT FUNCTIONAL, but booting goes on */ Regards, kunal On Wed, Sep 29, 2010 at 5:38 PM, Raffaele Recalcati <[email protected]<mailto:[email protected]>> wrote: On Wed, Sep 29, 2010 at 4:48 AM, kunal singh <[email protected]<mailto:[email protected]>> wrote: > Hi, > > MY SETUP > ----------------- > We have a dm6446 based board & we have been using 2.6.18 (MV) Linux. > Recently I tried upgrading to kernel 2.6.32 (PSP 03.01). > > PROBLEM > ------------------- > When the kernel boots I can not see any boot messages on the serial > console. I assume that if the boot flow passes beyond console_init (in > init/main.c) I should start to receive printk messages on the console. But > it does not happen so. > > ADDITIONAL INFORMATION > --------------------- > (1) If use the printascii function (low level debug print) in the > init/main.c, I can get messages on serial console. So, I assume that nothing > is wrong with hardware. > (2) The command line arguments (printed from kernel using printascii) > show that console=ttyS0,115200n8 > > Any idea what could be wrong? First Check your setup. I mean, with the same PC and serial port cable you can read and write to another device with 115200n8 comfiguration? Second You need to copy, in the mail, every messages you have on the serial line, from power up Third Check info here http://processors.wiki.ti.com/index.php/Category:DM644x Good work, Raffaele
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