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Old 09-07-2011, 09:05 AM   #1
varunb
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Location: Bangalore, INDIA
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Question Minicom showing intermittent console output thro' /dev/ttyUSB0 port


There is no error codes that gets displayed on screen. I am connecting through /dev/ttyUSB0 using PL203 driver. When i connect this to my hardware's console, and then execute 'find /' from my hardware's terminal, i get intermittent output thrown on minicom. As and when do keypress or move a mouse pointer it throws up a screenful of output before it stops. Again i have to keep moving either mouse/do key presses on keyboard to get the console output from my hardware. I am unable to get contineous console output of my hardware(logs).

On further experimatation, I have found that it doesnot look to be a minicom issue here. I tried using 'screen /dev/ttyUSB0 115200' and 'putty' (for linux) both are showing the same erratic behaviour mentioned above. My tty configuration as optained from stty is as below:

root# stty -a -F /dev/ttyUSB0
speed 115200 baud; rows 0; columns 0; line = 0;
intr = ^C; quit = ^\; erase = ^?; kill = ^U; eof = ^D; eol = <undef>;
eol2 = <undef>; swtch = <undef>; start = ^Q; stop = ^S; susp = ^Z; rprnt = ^R;
werase = ^W; lnext = ^V; flush = ^O; min = 1; time = 5;
-parenb -parodd cs8 -hupcl -cstopb cread clocal -crtscts
ignbrk -brkint -ignpar -parmrk -inpck -istrip -inlcr -igncr -icrnl -ixon -ixoff
-iuclc -ixany -imaxbel -iutf8
-opost -olcuc -ocrnl -onlcr -onocr -onlret -ofill -ofdel nl0 cr0 tab0 bs0 vt0 ff0
-isig -icanon -iexten -echo -echoe -echok -echonl -noflsh -xcase -tostop -echoprt
-echoctl -echoke

root# uname -a
Linux srinirao 2.6.37.1-1.2-desktop #1 SMP PREEMPT 2011-02-21 10:34:10 +0100 x86_64 x86_64 x86_64 GNU/Linux

I am using OpenSuse 11.4 distro on Intel's I7 processor and motherboard. It doesnot have onboard serial port, hence we are forced to use USB to Serial converter. Has anyone came across this issue ? Is there anything i am missing out here with either the ttyUSB0 or Kernel driver or configurations related to ttyUSB0 ? Should i upgrade/downgrade my drivers ?.

PLEASE HELP
I am facing this issue when i installed to OpenSuse 11.4.

Last edited by varunb; 09-09-2011 at 01:46 AM. Reason: editing the post after further examination.
 
Old 09-08-2011, 06:17 PM   #2
corp769
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Could you post the errors for us?
 
Old 09-09-2011, 12:37 AM   #3
varunb
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Quote:
Originally Posted by corp769 View Post
Could you post the errors for us?
like what errors i have to post???? is there any log files to see that???
 
Old 09-09-2011, 01:40 AM   #4
varunb
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Original Poster
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Question Minicom showing intermittent console output thro' /dev/ttyUSB0 port.

Quote:
Originally Posted by corp769 View Post
Could you post the errors for us?


There is no error codes that gets displayed on screen. I am connecting through /dev/ttyUSB0 using PL203 driver. When i connect this to my hardware's console, and then execute 'find /' from my hardware's terminal, i get intermittent output thrown on minicom. As and when do keypress or move a mouse pointer it throws up a screenful of output before it stops. Again i have to keep moving either mouse/do key presses on keyboard to get the console output from my hardware. I am unable to get contineous console output of my hardware(logs).

On further experimatation, I have found that it doesnot look to be a minicom issue here. I tried using 'screen /dev/ttyUSB0 115200' and 'putty' (for linux) both are showing the same erratic behaviour mentioned above. My tty configuration as optained from stty is as below:

root# stty -a -F /dev/ttyUSB0
speed 115200 baud; rows 0; columns 0; line = 0;
intr = ^C; quit = ^\; erase = ^?; kill = ^U; eof = ^D; eol = <undef>;
eol2 = <undef>; swtch = <undef>; start = ^Q; stop = ^S; susp = ^Z; rprnt = ^R;
werase = ^W; lnext = ^V; flush = ^O; min = 1; time = 5;
-parenb -parodd cs8 -hupcl -cstopb cread clocal -crtscts
ignbrk -brkint -ignpar -parmrk -inpck -istrip -inlcr -igncr -icrnl -ixon -ixoff
-iuclc -ixany -imaxbel -iutf8
-opost -olcuc -ocrnl -onlcr -onocr -onlret -ofill -ofdel nl0 cr0 tab0 bs0 vt0 ff0
-isig -icanon -iexten -echo -echoe -echok -echonl -noflsh -xcase -tostop -echoprt
-echoctl -echoke

root# uname -a
Linux srinirao 2.6.37.1-1.2-desktop #1 SMP PREEMPT 2011-02-21 10:34:10 +0100 x86_64 x86_64 x86_64 GNU/Linux

I am using OpenSuse 11.4 distro on Intel's I7 processor and motherboard. It doesnot have onboard serial port, hence we are forced to use USB to Serial converter. Has anyone came across this issue ? Is there anything i am missing out here with either the ttyUSB0 or Kernel driver or configurations related to ttyUSB0 ? Should i upgrade/downgrade my drivers ?.

PLEASE HELP
 
Old 10-04-2011, 07:54 AM   #5
varunb
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Registered: Mar 2011
Location: Bangalore, INDIA
Distribution: opensuse, fedora
Posts: 135
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Hi all,

I have added a bug on https://bugzilla.novell.com

Bug #716887


thanks and regards
varun
 
  


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