Re: [linux-usb-devel] partial message via usb serial console
Paul B Schroeder <[email protected]>
| Newsgroups | gmane.linux.usb.user,gmane.linux.usb.devel |
|---|---|
| Organization | Uplogix, Inc. |
| Message-ID | <[email protected]> |
> >> I understand that getting the kernel messages via a USB console isn't >> reliable. But I can't get the system/rc/initscripts startup stuff via >> ttyUSB0 either. Or is this just as unreliable.. The only way I get >> system/rc/initscripts startup stuff via ttyUSB0 is if I set >> 'CONSOLE=/dev/ttyUSB0' on my kernel command line.. And in that case the >> baud rate gets changed from 115200 to 9600.. i.e. The issue I'm trying to >> solve now, is with these messages via ttyUSB0: > > That's up to your init system, which is specific to your distro. That > CONSOLE= line is probably what init is reading to do what you need it to > do. I don't know about the baud rate issue, sorry, try reading the > documentation for your distro about this. > Well, init is using /dev/console by default. This works for ttyS1, but not ttyUSB0.. So when I have 'kernel /boot/vmlinuz-2.6.19-1.2895.uplogix.14 ro root=/dev/hda1 panic=5 console=tty0 console=ttyS1,115200', I can do 'echo test >/dev/console' and I see the output on ttyS1.. But when I have 'kernel /boot/vmlinuz-2.6.19-1.2895.uplogix.14 ro root=/dev/hda1 panic=5 console=tty0 console=ttyUSB0,115200' and I do 'echo test >/dev/console', I get absolutely nothing out of ttyUSB0.. So in my case here, adding 'CONSOLE=/dev/ttyUSB0' to the kernel command line ends up in the environment. So init ends up using CONSOLE as it was set in the environment.. Which I shouldn't have to do. /dev/console should just work.. This isn't distro specific.. This should be set up in the kernel appropriately.. Correct?? Also, /dev/console looks okay to me: [root@A101100369 ~]# ls -l /dev/console crw------- 1 root root 5, 1 Oct 31 00:54 /dev/console Thanks...Paul... ------------------------------------------------------------------------- This SF.net email is sponsored by: Splunk Inc. Still grepping through log files to find problems? Stop. Now Search log events and configuration files using AJAX and a browser. Download your FREE copy of Splunk now >> http://get.splunk.com/ _______________________________________________ [email protected] To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-users