Ubuntu
linux-source-2.6.17 package

  1. Bug #74034
  2. Comment #14

Comment 14 for bug 74034

Revision history for this message
Matthew Williams (number6) wrote : Re: Serial ports of some HP Laptops don't work in Edgy

Dirk,

Try using a program like minicom to access the serial port. If you haven't used minicom before, run "sudo minicom -s" to set up the port parameters like port name, baudrate, framing and flow control.

Another thing to check is the existance of a ttyS0 lock file in /var/lock. It should be called /var/lock/LCK..ttyS0. At least, that's what's created on my machine when minicom is accessing the serial port. The contents of this file should contain information about the process that holds the lock.

The PNP disable/enable trick works for me. I now have a fully operational serial port. As I said, I do not know why the serial port isn't being correctly setup on boot, so if my work-around doesn't work for you, there's not much that I can do to help.

Matt