Minicom Cannot Open /dev/ttys0 Input/output Error
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Cannot Open /dev/ttyusb0 Permission Denied
Stack Overflow the company Business Learn more about hiring developers or posting ads with cannot open /dev/ttys0 permission denied us Ask Ubuntu Questions Tags Users Badges Unanswered Ask Question _ Ask Ubuntu is a question and answer site for Ubuntu users minicom cannot open dev tty8 permission denied and developers. Join them; it only takes a minute: Sign up Here's how it works: Anybody can ask a question Anybody can answer The best answers are voted up and rise to the top Serial
Could Not Open Port /dev/ttyusb0: [errno 13] Permission Denied: '/dev/ttyusb0'
port terminal > Cannot open /dev/ttyS0: Permission denied up vote 7 down vote favorite 3 I had Windows XP on this box and it failed. Thinking it was corrupted OS I tried to reinstall, and it failed. But then I tried to install Ubuntu, and I could not run it from the USB or from the HD. Did the mem test and found out one of my 512MB sticks (had 2) failed.
Cu: /dev/ttys0: Line In Use
I removed the bad one and was able to install Ubuntu but it was sluggish. I was trying to quickly setup my packet radio for Hurricane Sandy. Downloaded the Serial Port Terminal and was able to get some use but the system kept locking up. So Installed Xubuntu next to it, planning on running out the next day to get RAM for the box. Put Xubuntu on and now I am getting the following error with serial port terminal.: Cannot open /dev/ttyS0: Permission denied I would like to be able to use serial port terminal, or equivalent with Xubuntu so I can use my kpc3 packet terminal, connect to the com port on the back of my computer. Any ideas? serial-port share|improve this question edited Aug 26 '13 at 3:33 Braiam 39.1k1693154 asked Oct 31 '12 at 18:03 Joe Reynolds 36112 add a comment| 3 Answers 3 active oldest votes up vote 15 down vote The tty devices belong to the "dialout" group, I suspect you are not a member of this group and hence are denied access to /dev/ttyS0, so you need to add yourself to that group. First check if you are a member of that group: groups ${USER} ..this will list all the groups you belong to. If you don't belo
1 #1 2013-04-05 14:35:39 Hexorg Member Registered: 2009-02-23 Posts: 27 [Solved] Using serial port (can't start communication) Hello everyone. I'm trying to connect to a switch through a cannot access /dev/ttyusb0' no such file or directory built-in to motherboard serial port using minicom. I have arch running on
Bash Dev Ttys0 Permission Denied
vanilla kernel. `zgrep -i serial /proc/config.gz` tells me that CONFIG_SERIAL_8250=y, but `dmesg | grep tty` shows only /dev/ttys0: tcgetattr: input/output error tty0 active. I can't see anything serial port related with neither lspci, lshw, nor lsusb.I do have /dev/ttyS[0-3] but if I try to cat any of them it http://askubuntu.com/questions/210177/serial-port-terminal-cannot-open-dev-ttys0-permission-denied gives me input/output error. `setserial /dev/ttyS0` says "/dev/ttyS0, UART: unknown, Port: 0x03f8, IRQ: 4". Setting uart to 8250 with setserial did not help :-\I also tried starting agetty@ttyS0.service, no luck either.It seems like it *should* work out-of-box. But I can't communicate with the switch :-\Can someone please help me get the serial port working?TL;DR:-> Hardware serial port-> Vanilla https://bbs.archlinux.org/viewtopic.php?id=160908 kernel-> `dmesg | grep tty` shows only tty0-> `setserial /dev/ttyS0` says "/dev/ttyS0, UART: unknown, Port: 0x03f8, IRQ: 4"-> cat: /dev/ttyS0: Input/output error-> Minicom stays dark.-> Thanks for help! Last edited by Hexorg (2013-04-05 15:12:43) Offline #2 2013-04-05 15:12:08 Hexorg Member Registered: 2009-02-23 Posts: 27 Re: [Solved] Using serial port (can't start communication) Nevermind... Someone had serial port disabled in BIOS... Offline #3 2013-04-05 15:12:38 ewaller Administrator From: Pasadena, CA Registered: 2009-07-13 Posts: 13,588 Re: [Solved] Using serial port (can't start communication) It looks like your system is expecting the serial port to exist on the old ISA bus. Most modern architectures use a LPC (Low Pin Count) bus to provide ISA bus services. The kernel sets up the four legacy MSDOS COM: ports of 0x3f8, 0x2f8, 0x3e8 and 0x02e8 sharing iqq's 3 and 4 and maps them to /dev/ttyS[[0-3]; regardless of whether there is really hardware there.The question is: How is your serial port actually implemented? Do you know for certain that it is implemented as an legacy ISA device
here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and http://unix.stackexchange.com/questions/192075/cat-dev-ttys0-input-output-error policies of this site About Us Learn more about Stack Overflow the company Business Learn more about hiring developers or posting ads with us Unix & Linux Questions Tags Users Badges Unanswered Ask Question _ Unix & Linux Stack Exchange is a question and answer site for users of Linux, FreeBSD and other Un*x-like operating systems. Join them; it only takes a permission denied minute: Sign up Here's how it works: Anybody can ask a question Anybody can answer The best answers are voted up and rise to the top cat /dev/ttyS0 Input/output error up vote 2 down vote favorite I created infrared receiver as in LIRC manual (http://www.lirc.org/receivers.html). And tested it on windows using program called Terminal. When I switched on RTS pin DCD pin was minicom cannot open also switched on and when I used remote controll DCD was blinking. So everything works with hardware. Next I tried using the same hardware on Linux Mint 17 on same computer as in http://lifehacker.com/5527752/control-your-desktop-pc-with-a-remote-using-lirc but with no luck: piotrek-H87-HD3 piotrek # cat /dev/ttyS0 cat: /dev/ttyS0: Input/output error I also followed http://www.commandlinefu.com/commands/view/10218/ttys0-terminal-on-serial-connection. In this tutorial there was the same error I had so I tried looking in BIOS setup but serial ports were enabled. Why isin't it working? Some information data: piotrek-H87-HD3 piotrek # cat /proc/tty/driver/serial serinfo:1.0 driver revision: 0: uart:16550A port:000003F8 irq:4 tx:0 rx:0 1: uart:unknown port:000002F8 irq:3 2: uart:unknown port:000003E8 irq:4 3: uart:unknown port:000002E8 irq:3 4: uart:16550A port:0000F080 irq:19 tx:34 rx:0 CTS|DSR|CD 5: uart:unknown port:00000000 irq:0 6: uart:unknown port:00000000 irq:0 7: uart:unknown port:00000000 irq:0 8: uart:unknown port:00000000 irq:0 ... //EDIT I was wondering lately if maybe linux somehow switched pin layout of my serial port? My motherboard COM port pins layout is : I have back panel extension cord which maps 1:1 pin layout from motherboard to back panel like this: ------------------- \ [1][3][5][7][9] / \ [2][4][6][8] / \ ___________ / In windows pin order