I don't know specifically about your model, but some of the laserwriter models use localtalk only, which doesn't work in Linux. There are also a couple that are true serial, but use really strange settings that require various hacks in the serial driver. From what I've found on the net, this model looks like it uses RS-422 serial (asynchronous) at 57.6kb, which should be fine with what you've set. There may be a bug in the macserial driver, but it's hard to say. Check in /proc/interrupts to see if it's getting buried by the SCC chip
Here's part of the interrupts on my G4. Obviously I don't use the serial ports, since it's only the modem on this one. [EMAIL PROTECTED]:~$ cat /proc/interrupts CPU0 5: 0 OpenPIC Edge SCC-txdma 6: 0 OpenPIC Edge SCC-rxdma 7: 0 OpenPIC Edge SCC-txdma 8: 0 OpenPIC Edge SCC-rxdma [snip] 50: 0 OpenPIC Level SCC On Thu, Mar 13, 2003 at 12:15:38AM -0500, Ed McMan wrote: > I'm trying to get a laserwriter select 300 to print, and it's just not > happening. Whenever something tries to access /dev/ttyS1, the machine > locks up until the printer is turned off. Likewise, stty 57600 < > /dev/ttyS1 locks up the machine until the printer is turned off. The > machine is a 6500. It prints fine from Mac OS. I tried the > 2.2.20-pmac kernel, and the 2.4.18-newpmac kernel. Both did the same > thing. Any ideas?