how to fix USB serial port not appearing in Maple IDE under Ubuntu 9.10

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how to fix USB serial port not appearing in Maple IDE under Ubuntu 9.10

(17 posts) (9 voices)

Started 5 years ago by Adam
Latest reply from AndyH

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Adam
Member

My USB serial port /dev/ttyACM0 would not appear in the Maple IDE under Ubuntu 9.10 Karmic Koala unless I ran the IDE as root. I did not want to do that. This is what I did to fix it.

The problem is that Ubuntu defaults the /dev/ttyACM0 device to be in the "dialout" group, but the IDE needs it to be in the "plugdev" group. You can manually "sudo chgrp plugdev /dev/ttyACM0" but when you unplug and replug, it will go back to the "dialout" group. This is because the plugging is handled by the Linux udev system.

udev's config files are in /lib/udev/rules.d/ . The particular config file causing the problem is /lib/udev/rules.d/50-udev-default.rules. This can be overridden by creating a file in /etc/udev/rules.d/ . I created a file called /etc/udev/rules.d/50-udev-tty.rules, and put the following lines in it:

# to make Maple hotplug USB tty work
KERNEL=="ttyACM[0-9]", GROUP="plugdev"

Then I unplugged and plugged the USB cable to the Maple board, and restarted the Maple IDE. The board appeared in the Serial menu!

cheers
adam
--
Adam Feuer

Posted 5 years ago #
perry
Administrator

hi adam,

Have you verified that you are a member of the dialout group? If so, it shouldn't be necessary to change the group permissions on those devices

try running 'groups' and ensure that you're a member of dialout

Posted 5 years ago #

bnewbold
Ex-Leaflabs

Hey adamfeuer!

Did you run the install-udev-rules.sh script as described in the Quickstart and Installation docs? We bundle a 45-maple.rules file that is very similar to what you have above:

BUS!="usb", ACTION!="add", SUBSYSTEM!=="usb_device", GOTO="maple_rules_end"

SYSFS{idProduct}=="1001", SYSFS{idVendor}=="0110", MODE="664", GROUP="plugdev"
SYSFS{idProduct}=="1002", SYSFS{idVendor}=="0110", MODE="664", GROUP="plugdev"
SYSFS{idProduct}=="0003", SYSFS{idVendor}=="1EAF", MODE="664", GROUP="plugdev"
SYSFS{idProduct}=="0004", SYSFS{idVendor}=="1EAF", MODE="664", GROUP="plugdev"

LABEL="maple_rules_end"

FWIW i'm actually debugging this rules file on Ubuntu 10.04 where it doesn't seem to work as reliably; a possible alternative is:

ATTRS{idProduct}=="0003", ATTRS{idVendor}=="1eaf", MODE="664", GROUP="plugdev"
ATTRS{idProduct}=="0004", ATTRS{idVendor}=="1eaf", MODE="664", GROUP="plugdev" SYMLINK+="maple"

Posted 5 years ago #

Adam
Member

Bnewbold and Perry,

Yes, I ran the install-udev-rules.sh script, and have the 45-maple.rules file installed. I was also member of the dialout group - I tried both of these first!

However, they didn't work for me - I still had to run the maple-ide as root to use the serial port. After installing the additional rule file, all worked ok.

-adam

Posted 5 years ago #
bnewbold
Ex-Leaflabs
I'm curious why the bundled 45-maple.rules file didn't work for you; I originally wrote it on Ubuntu 9.10 64bit and it's always worked for us in testing. As you can see it tries to set the group for the Maple to "plugdev"; your version would apply to all CDC_ACM devices which should be fine for most people but might ruffle some feathers.

Could you post your kernel (uname -a) and udev version (udev --version)? And if you have the time could you give the latest version a try? I had to switch from SYSFS to ATTRS for the newer version of udev in Ubuntu 10.04; this should be backwards compatible.

Here's the new version of that file (http://github.com/leaflabs/maple-ide/blob/master/build/linux/dist/45-maple.rules ):
```
 
ATTRS{idProduct}=="1001", ATTRS{idVendor}=="0110", MODE="664", GROUP="plugdev" 
ATTRS{idProduct}=="1002", ATTRS{idVendor}=="0110", MODE="664", GROUP="plugdev" 
ATTRS{idProduct}=="0003", ATTRS{idVendor}=="1eaf", MODE="664", GROUP="plugdev" SYMLINK+="maple" 
ATTRS{idProduct}=="0004", ATTRS{idVendor}=="1eaf", MODE="664", GROUP="plugdev" SYMLINK+="maple" 
```
Other issues that have caught me up in the past are having the correct permissions on the .rules file and remembering to restart udev.
Posted 5 years ago #
gadgetkontor
Member

same problem on Sidux 32bit (rolling release distro based on debian sid - sidux.com): the updated udev rule works now.

Posted 5 years ago #
Adam
Member

I am running Ubuntu 9.10 on a Mac Pro hardware with a custom kernel. I can't post the uname and udev info right now because it's at home, but will look at it tonight.

However... I also ran a distupgrade this morning to upgrade to 10.10... so may not have the problem anymore. I will try to remove my rule file and use the current rule file that you list above and report back.

-adam
--
Adam Feuer

Posted 5 years ago #
Adam
Member

I don't know why it was not working the Ubuntu 9.10 version I was using. Now, however...

Whoops, I mean, a distupgrade to Ubuntu 10.04 LTS. The upgrade worked, I uninstalled my custom rule file and the old file, and installed the one you reference above. That worked fine - I can plug and unplug my Maple board, and can see the /dev/ttyACM0 entry in the Serial Port menu. The IDE automatically selects it.

All is well!

cheers
adam
--
Adam Feuer

Posted 5 years ago #
poslathian
LeafLabs

Hmm, there certainly needs to be some more hunting here. The install script udev rules, and /dev/maple remapping never worked for me. I got it working in debian lenny via manually adding myself to plugdev and creating plugdev, but the /dev/maple remap still doesnt work. In general, it seems were starting to get a pile of people running as root to avoid extra hassle here. Thanks for pointing out this fix, im sure it will apply to others!

Posted 5 years ago #
celem
Member

I recently installed maple-ide version 0.0.12 into my Linux Mint-13-XFCE amd64 system (same base as Ubuntu 12.04). Plugging in a Maple-mine r3 into a usb port assigned is as:
crw-rw-r-- 1 root dialout 166, 0 Jan 5 17:37 /dev/ttyACM0

However, the ide only displays /dev/ttyS0, which has nothing attached to it. This is true is run as user or root since my userid is assigned to both the dialout and plugdev groups.

After installing /etc/udev/rules.d/45-maple.rules, the node /dev/maple is created but the ttyACM0 remains assigned to the dialout group and the ide still only displays /dev/ttyS0

After installing /etc/udev/rules.d/50-udev-tty.rules, as described by 'adam', herein, the port is correctly assigned to plugdev.
crw-rw-r-- 1 root plugdev 166, 0 Jan 5 17:37 /dev/ttyACM0
Unfortunately, the ide still only displays /dev/ttyS0

No joy with the ide on Linux!

Is this a 32-bit vs 64-bit issue?? I noticed, while poking around in the RXTX java source, that there were 32 and 64 bit versions of the RXTX comm driver. Possibly I have a 32 bit version?

Posted 3 years ago #
celem
Member

I loaded the 64-bit maple-ide-0.0.9 and it behaves the same - the ide still only displays /dev/ttyS0.

Posted 3 years ago #
celem
Member

UPDATE: After loading 64-bit maple-ide-0.0.9 into a second folder, I copied librxtxSerial.so and RXTXcomm.jar from the 64-bit maple-ide-0.0.9/lib to the 32-bit maple-ide-v0.0.12/lib and NOW the ttyACM0 port is detected and displayed along with the anomalous ttyS0.

There REALLY needs to be a 64-bit Linux version of .12!

Posted 3 years ago #
msowka
Member

Yes, In can reproduce this problem on my Precise 12.04 LTS install. After setting the udev-tty.rules the right group got hacked in there.

Thanks OP

Posted 3 years ago #
bnewbold
Ex-Leaflabs

A 64bit linux build is a top priority, sorry it has been so long in coming.

Posted 2 years ago #
crenn
Moderator

Will new builds utilising the new libmaple style be available for all platforms?

Posted 2 years ago #

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