I have SLF4.7 on my laptop and I don't have the problem you mention. In the days when I had 4.4 it was OK too. Steve On Tue, 3 Nov 2009, WILLIAM J LUTTER wrote: > If I install SL4.4 on a laptop and then try to use the /dev/ttyS0 serial port, I find I can't control the ownership and permissions of the port. It resets from 0660 root uucp to root root and owner rw permissions. So, I can't add a user to the uucp group to manage usage of the serial port (this works ok on SL5.0. If I try to just run everything via sudo, it seems my terminal settings via stty have changed. > > I know I'm not using an up-to-date SL release, nevertheless, is this a "known" issue with an obvious work around - so I don't have to reinstall? > > Bill Lutter > -- ------------------------------------------------------------------ Steven C. Timm, Ph.D (630) 840-8525 [log in to unmask] http://home.fnal.gov/~timm/ Fermilab Computing Division, Scientific Computing Facilities, Grid Facilities Department, FermiGrid Services Group, Assistant Group Leader.