Hello, I have a RS/6000 B50 with a ttyS0 serial console and a modem attached to ttyS0 and agetty process atteched to ttyS0 as well. Today I noticed that kernel is logging messages like Nov 8 16:07:35 spunk kernel: Bogus interrupt -1 from PC = c00dbfa0 Nov 8 16:08:37 spunk kernel: Bogus interrupt -1 from PC = c00dbfa0 every 61 seconds or so. The /boot/System.map-2.4.2 file gives the following section: c00dbf48 t rs_set_termios c00dc0d4 t rs_close c00dc330 t rs_wait_until_sent When I remove the agetty process, the messages stop and when I enable it again, the messages appear again. I don't know what to think about that. The dial-in is working fine though and I can't think anything else. Is it just a message (which I could ignore) or does it mean something is wrong ? Perhaps the setup (a modem attached to the serial console and agetty attached to the serial port as well) is not correct ? I could use another serial port for testing to see if the messages cease, but its not very simply done (the machine is a remote one and I would need to call the housing provider and pay for a visit). Also, I would like to control the booting of the B50 from the IBM stuff, not just hoping that after kernel upgrade the new kernel would load correctly and start the agetty on a port. Using two modems (one for serial console and another for ttyS1 login) doesn't seem to be a effective idea. The distribution is SuSE 7.1 PPC edition, the kernel is 2.4.2 (SuSE stock), the agetty line in the inittab is S0:123:respawn:/sbin/agetty 9600 ttyS0 Thanks in advance, Aivo Kalu, aivo@matti.ee