Hi all, Is there a HOWTO on serial port console debugging for Gentoo? I'm seeing a crash on a new kernel at boot time and the kernel developers have asked me to set up a null modem environment, which I've done. I'm now trying to test it. However their very simple first test command:
lightning ~ # echo x > /dev/ttyS0 lightning ~ # does not appear to produce any text on the second machine. I know nothing about setting up serial ports under Linux and am looking for some instructions. Here's the environment: Machine 1 - lightning - 1 serial port - this is the machine that crashes at boot with a certain option Machine 2 - gigastudio - 2 serial ports - this machine is running minicom What's a really simple process for checking out whether this is set up correctly? 1) I don't know that the null modem cable is good. I just bought it. 2) I don't know how to see if the serial ports are receiving any valid data, status signals, or anything else to show they are working. 3) I don't know if minicom would display incoming characters by default. I do think that I have serial support built into both kernels, but I'm not sure where to look to see status of serial ports. Thanks in advance for your ideas. Cheers, Mark -- gentoo-user@gentoo.org mailing list
