> i have centos 4.2. I have install a PCI card having serial port. > when the os is booted it detects the new hardware ( serial port) .a device is also created /dev/ttyS0. the port works very goog on the same pc in windows XP. but when i connect any serial device to that port in linux it does not work. > > in /proc/ioports > > there is entry for that port as > > 0000-001f : dma1 > 0020-003f : pic1 > 0040-005f : timer > 0060-006f : keyboard > 0070-007f : rtc > 0080-008f : dma page reg > 00a0-00bf : pic2 > 00c0-00df : dma2 > 00f0-00ff : fpu > 0170-0177 : ide1 > 01f0-01f7 : ide0 > 0376-0376 : ide1 > 03c0-03df : vga+ > 03f6-03f6 : ide0 > 03f8-03ff : serial(auto) ---- > displayed here > 0cf8-0cff : PCI conf1 > c000-cfff : PCI Bus #01 > c800-c8ff : Realtek Semiconductor Co., Ltd. RTL-8139 > c800-c8ff : 8139too > d800-d81f : PCI device 8086:24d3 (Intel Corp.) > dc00-dc1f : PCI device 8086:24d2 (Intel Corp.) > dc00-dc1f : usb-uhci > e000-e01f : PCI device 8086:24d4 (Intel Corp.) > e000-e01f : usb-uhci > e400-e41f : PCI device 8086:24d7 (Intel Corp.) > e400-e41f : usb-uhci > e800-e81f : PCI device 8086:24de (Intel Corp.) > e800-e81f : usb-uhci > ec00-ec07 : PCI device 8086:2572 (Intel Corp.) > ffa0-ffaf : PCI device 8086:24db (Intel Corp.) > > > please help me out is there any extra configuration to be done. <http://tldp.org/HOWTO/Remote-Serial-Console-HOWTO/>