On Sun, Apr 09, 2006 at 05:33:50PM +0200, Christophe Jacquet wrote: > When I type " echo 'Hello world' >/dev/lp0 ", I get the message: > > lp0: ECP mode > > The string gets printed on the printer. > > Then, Linux crashes. I get no more messages. The Bash prompt never comes back. I > can interact with OBP by hitting "Stop-A", and reboot the machine. Hi, this reminds me of a problem I had a few week ago while playing with an homebuild parallel port project. The machine would lock totally, but as soon as I disconnected the circuit from the port the machine would unlock. Maybe you could try disconnecting the printer and see what happens? Here are more details about the problem I observed: When the parallel port interrupt is enabled, the machine hangs as long as the ACK pin is held low. I observed that the parport interrupt count in /proc/interrupt were higher after each hang. It looks to me like the parport interrupt is level triggered instead of edge triggered. I wanted try on x86 hardware to see if the problem also happens before posting, but I decided to post anyway when I saw this message. I observed this on a 2.6.16-rc6-git-something. Regards, Raphael Assenat - To unsubscribe from this list: send the line "unsubscribe sparclinux" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
