Hi, I built a linux from scrach distro and setserial is not installed. At boot up; all of the IRQ numbers for serial ports 1-4 are reported correctly (according to the bios setting) from the bootup log. They are as followed. ttyS0 at 0x03f8 (irq = 4) is a 16550A ttyS1 at 0x02f8 (irq = 4) is a 16550A ttyS2 at 0x03e8 (irq = 11) is a 16550A ttyS3 at 0x02e8 (irq = 11) is a 16550A However, after bootup, i login and looked at /proc/tty/driver/serial, i noticed that all the IRQ for four serial ports are wrong, and they as as follow: ttyS0 to IRQ 4 ttyS1 to IRQ 3 ttyS2 to IRQ 4 ttyS3 to IRQ 3 as expected, serial ports ttyS1, ttyS2, and ttyS3 did not function because the IRQs were reconfigured somehow. I would like to know what reconfigured the IRQs since setserial is not installed in my distro. I also checked all the startup scripts in userspace and noticed that nothing would have reconfigured these ports. I am thinking about installing setserial to my distro to reconfigure the irqs back to the ones listed at bootup; however, I would like to know what caused them to change in the first place. Thank you, Toan -- To unsubscribe from this list: send the line "unsubscribe linux-serial" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
