when use minicom, received "Device /dev/ttyS1 access failed: Permission denied."
Hi,
I try to connect to my Cisco router via minicom, but I received the following error message: "Device /dev/ttyS1 access failed: Permission denied." My currently setting for serial port is: Serial Device : /dev/ttyS1 Bps/Par/Bits : 9600 8N1 Hardware Flow Control : No Software Flow Control : No and I use Prolific PL2303 USB adapter for connection, and here is the last couple line from dmesg output: usb 5-1: new full speed USB device using uhci_hcd and address 2 usb 5-1: New USB device found, idVendor=067b, idProduct=2303 usb 5-1: New USB device strings: Mfr=1, Product=2, SerialNumber=0 usb 5-1: Product: USB-Serial Controller usb 5-1: Manufacturer: Prolific Technology Inc. usb 5-1: configuration #1 chosen from 1 choice usbcore: registered new interface driver usbserial USB Serial support registered for generic usbcore: registered new interface driver usbserial_generic usbserial: USB Serial Driver core USB Serial support registered for pl2303 pl2303 5-1:1.0: pl2303 converter detected usb 5-1: pl2303 converter now attached to ttyUSB0 usbcore: registered new interface driver pl2303 pl2303: Prolific PL2303 USB to serial adaptor driver any idea what caused the problem? Thank you in advance! Regards, -Fu Lee |
By the way the os is Fedora 11
[root@flee-hp-pc fu]# uname -a Linux flee-hp-pc.homelinux.net 2.6.30.10-105.2.23.fc11.i686.PAE #1 SMP Thu Feb 11 07:05:37 UTC 2010 i686 i686 i386 GNU/Linux Thanks, -Fu Lee |
I have also tried different kind of calbes (straight through, roll-over),
also on device, I have tried /dev/ttyS0, /dev/ttyS1, /dev/ttyS2, ..., but still received the same error messages. Thanks, -Fu Lee |
Hi,
After I search some other forum, I found out my problem is caused by: 1. because I use USB converter, so on Serial Device need to specify: /dev/ttyUSB0 instead of /dev/ttyS0 2. for Cisco Catalyst 2950 it needs a roll-over cable connection 3. Bps/Par/Bits : 9600 8N1 After that, my connection is up and running, so please close my case. Thank you, -Fu Lee |
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