Hello!
Your description of the classic Null-Modem device is correct. The baud
rate isn't. it is 115200 not the value you used.

Thanks for correction!
My finger on the key 2 was too fast :-)
As I see, it is really time to go to bed... (at least in our country)

BR, Ales

-----
Gregg C Levine gregg.drw...@gmail.com
"This signature fought the Time Wars, time and again."


On Tue, Sep 17, 2013 at 5:10 PM, Aleš Nesrsta <star...@volny.cz> wrote:
# stty -F /dev/ttyUSB0 9600 -echo
# cat /dev/ttyUSB0 > ttyUSB0.txt


It was 9600 usually, but probably it should be 112500 now, as Vladimir
wrote.
If you want, you can ensure some speed on GRUB side by parameter -s ,e.g.:
serial -s 112500


serial
terminal_output console serial
debug=all
insmod ohci
insmod ehci
ls

I didn't get anything captured, sorry...  But with the serial setup,

grub seems to freeze on:

disk/pata.c:274:  status=0x50, error=0x0, sectors=0x0
kern/disk.c:326:  Closing `ata0'.


Something changed in GRUB in the meantime, so try this for current trunk
code:


serial
terminal_output console serial
debug=all
nativedisk
ls



My mistake, the adapter is not a null modem.

At least these pins must be connected by null-modem cable:
3 - 2
2 - 3
5 - 5
This is valid for "classic" 9pin PC connectors on both sides of cable. You
can check the cable by ohmmeter if it is correct.


Additionally:
There exist some important USB related patches which are not included in
trunk yet - see the history of mail list and search for posts from me and
Melki Christian some weeks ago.

BR, Ales


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