Re: [Query] Garbled characters on gtkterm

[Tony Lindgren <tony@atomide.com>]

* DebBarma, Tarun Kanti <tarun.kanti@ti.com> [100917 10:36]:
> Hi,
> While trying to boot kernel image on N800 I am seeing
> lot of garbled characters along with the trace in gtkterm.
> 
> I have configured the terminal as follows:
> Port: ttyS0
> Speed: 115200
> Parity: none
> Bits:8
> Stopbits: 1
> Flow control: none
> End of delay(ms): 0
> 
> Can someone help me if I am missing anything in my configuration?

> [    0.000000] Linux version 2.6.36-rc4-00040-g4c1f85c-dirty (x0016154@omaplbp) (gcc version 4.4.1 (Sourcery G++ Lite 2010q1-202) ) #7 Fri Sep 17 15:57:29 IST 2010

Quite recent kernel, good :)

> 
> [    0.000000] CPU: ARMv6-compatible processor [4107b362] revision 2 (ARMv6TEJ), cr=00c5387f
> 
> [    0.000000] CPU: VIPT aliasing data cache, VIPT aliasing instruction cache
> 
> [    0.000000] Machine: Nokia N800
> 
> [    0.000000] Ignoring unrecognised tag 0x414f4d50
> 
> [    0.000000] bootconsole [earlycon0] enabled
> 
> [    0.000000] Memory policy: ECC disabled, Data cache writeback
> ....
> <<Garbled characters>>

I'm not seeing these, just booted my n800 last night with the cbus
patches from Felipe. I believe all I did was yes "" | ARCH=arm make oldconfig
on the n8x0_defconfig that we still have around.

I've seen things like that with some USB serial dongles earlier,
I believe that the pl2303 based one worked, and then the ftdi
driver one produced garbage. AFAIK, this was related to some
problem with the serial port level shifter, I think this was
with n810.

Regards,

Tony